Summary:
                    
A complete protein is a protein source that "contains adequate proportions of the nine essential amino acids" that our body can not produce on its own.
                      Relatively low in protein, a single red bell pepper contains 1.6 grams of protein, or about 3% of recommended daily values. [1]
 To get the adequate amount of protein with red bell pepper alone, you will need 31 red bell pepper (5050 grams) for an average female, or 37 red bell pepper for males. [4] That's over 1310 calories, and a lot of red bell pepper! Pairing red bell pepper with a richer protein source is a good idea.
                      
                      
                        Full nutritional profile for red bell pepper 
                        
                        USDA Source: Peppers, sweet, red, raw
                    
Macronutrients in 1 large (164g) of red bell pepper:
| % of RDV | Amount | ||
| Calories | 
                               | 
                            2.1% | 43 kCal | 
| Carbohydrates | 
                               | 
                            0% | - | 
| Total fat | 
                               | 
                            0.8% | 0.5 grams | 
| Protein | 
                               | 
                            3.2% | 1.6 grams | 
                    Proportionally, red bell pepper does contain abundant amounts of 4 out of the nine essential amino acids.  However, red bell pepper is a little short on isoleucine, leucine, lysine, methionine and valine.[1]
To have adequate amounts of all nine essential amino acids with red bell pepper alone, you will have to eat 87 red bell pepper (14333 grams) for an average person. [2]
That's about 184% more red bell pepper to compensate for the lack of isoleucine, leucine, lysine, methionine and valine, compared to the protein requirement alone.
                  
The amount of each essential amino acid in 1 large (164g) of red bell pepper:
| Amino Acid | % of RDV [2] | Amount [1] | 
                            Complete / Adequate  | 
                        |
| Protein | 
                               | 
                           
                            3.2% | 1.624g | |
| Histidine | 
                               | 
                           
                            4.4% | 0.028g | |
| Isoleucine | 
                               | 
                           
                            4% | 0.034g | |
| Leucine | 
                               | 
                           
                            3.1% | 0.059g | |
| Lysine | 
                               | 
                           
                            3.5% | 0.059g | |
| Methionine | 
                               | 
                           
                            1.1% | 0.01g | |
| Phenylalanine | 
                               | 
                           
                            5.5% | 0.082g | |
| Threonine | 
                               | 
                           
                            7.3% | 0.066g | |
| Tryptophan | 
                               | 
                           
                            7.6% | 0.02g | |
| Valine | 
                               | 
                           
                            4.7% | 0.051g | 
                          
                      
                                              
                          
                          
                                              
                      Low in protein, carrot is high in isoleucine, leucine, lysine, methionine and valine,  which is complementary to red bell pepper. 
A ratio of 0.7 red bell pepper (109g) and 3 carrots (212g) creates a complete protein profile. In fact, any ratio of more than 1.9:1 of carrot to red bell pepper will be complete. 
                      
                      
                        Full nutritional profile for carrots 
                        USDA Source: Carrots, raw
                    
| Amino Acid | % of RDV [2] | Amount [5] | 
                            Complete / Adequate  | 
                        |
| Protein | 
                               | 
                            6.1% | 3.1g | |
| Histidine | 
                               | 
                            16.4% | 0.1g | |
| Isoleucine | 
                               | 
                            21.7% | 0.19g | |
| Leucine | 
                               | 
                            13.5% | 0.26g | |
| Lysine | 
                               | 
                            14.8% | 0.25g | |
| Methionine | 
                               | 
                            5.7% | 0.05g | |
| Phenylalanine | 
                               | 
                            12.4% | 0.18g | |
| Threonine | 
                               | 
                            49.9% | 0.45g | |
| Tryptophan | 
                               | 
                            14.8% | 0.04g | |
| Valine | 
                               | 
                            16.7% | 0.18g | 
                          
                      
                                              
                          
                          
                                              
                      Pumpkin seed is a reasonable source of supplementary protein, and  is high in isoleucine, leucine, lysine, methionine and valine,  complementing the profile of red bell pepper. 
For example, 2 red bell pepper (328g) and 0.4 cup of pumpkin seeds (27g) make a complete amino acids profile. The entire range to create a complete protein are ratios of 1:0.08 to 1:41 for red bell pepper to pumpkin seed by weight. 
                      
                      
                        Full nutritional profile for pumpkin seeds 
                        USDA Source: Seeds, pumpkin and squash seeds, whole, roasted, without salt
                    
| Amino Acid | % of RDV [2] | Amount [6] | 
                            Complete / Adequate  | 
                        |
| Protein | 
                               | 
                            16.5% | 8.3g | |
| Histidine | 
                               | 
                            31% | 0.2g | |
| Isoleucine | 
                               | 
                            38% | 0.33g | |
| Leucine | 
                               | 
                            28.7% | 0.54g | |
| Lysine | 
                               | 
                            28.8% | 0.49g | |
| Methionine | 
                               | 
                            15.4% | 0.13g | |
| Phenylalanine | 
                               | 
                            27.8% | 0.41g | |
| Threonine | 
                               | 
                            35.1% | 0.32g | |
| Tryptophan | 
                               | 
                            49.1% | 0.13g | |
| Valine | 
                               | 
                            46.7% | 0.5g | 
                          
                      
                                              
                          
                          
                                              
                      A reasonable source of supplementary protein, hedge mustard seed is high in isoleucine, leucine, lysine, methionine and valine,  which is complementary to red bell pepper. 
A ratio of 2 red bell pepper (328g) and 0.4 cup of hedge mustard seeds (28g) creates a complete protein profile. The entire range to create a complete protein are ratios of 1:0.09 to 1:43 for red bell pepper to hedge mustard seed by weight. 
                      
                      
                        Full nutritional profile for hedge mustard seeds 
                        USDA Source: Seeds, sisymbrium sp. seeds, whole, dried
                    
| Amino Acid | % of RDV [2] | Amount [7] | 
                            Complete / Adequate  | 
                        |
| Protein | 
                               | 
                            13.3% | 6.6g | |
| Histidine | 
                               | 
                            23.3% | 0.15g | |
| Isoleucine | 
                               | 
                            29.1% | 0.25g | |
| Leucine | 
                               | 
                            24.5% | 0.46g | |
| Lysine | 
                               | 
                            20.1% | 0.34g | |
| Methionine | 
                               | 
                            12.4% | 0.11g | |
| Phenylalanine | 
                               | 
                            22% | 0.33g | |
| Threonine | 
                               | 
                            36% | 0.32g | |
| Tryptophan | 
                               | 
                            43.7% | 0.11g | |
| Valine | 
                               | 
                            27.7% | 0.3g | 
                          
                          
                                              
                      Chia seed is a reasonable source of supplementary protein, and  is high in isoleucine, leucine, lysine, methionine and valine,  complementing the profile of red bell pepper. 
For example, 2 red bell pepper (328g) and 0.7 ounce of chia seeds (19g) make a complete amino acids profile. The entire range to create a complete protein are ratios of 1:0.06 to 1:29 for red bell pepper to chia seed by weight. 
                      
                      
                        Full nutritional profile for chia seeds 
                        USDA Source: Seeds, chia seeds, dried
                    
| Amino Acid | % of RDV [2] | Amount [8] | 
                            Complete / Adequate  | 
                        |
| Protein | 
                               | 
                            12.7% | 6.4g | |
| Histidine | 
                               | 
                            24.7% | 0.16g | |
| Isoleucine | 
                               | 
                            25.5% | 0.22g | |
| Leucine | 
                               | 
                            19.9% | 0.38g | |
| Lysine | 
                               | 
                            17.6% | 0.3g | |
| Methionine | 
                               | 
                            15.1% | 0.13g | |
| Phenylalanine | 
                               | 
                            23.8% | 0.35g | |
| Threonine | 
                               | 
                            29.4% | 0.26g | |
| Tryptophan | 
                               | 
                            46.7% | 0.12g | |
| Valine | 
                               | 
                            25.9% | 0.28g | 
                          
                      
                                              
                          
                          
                                              
                      A great source of protein, spirulina is high in isoleucine, leucine, lysine, methionine and valine,  which is complementary to red bell pepper. 
A ratio of 1.4 red bell pepper (234g) and 1.4 tablespoons of spirulina (10g) creates a complete protein profile. The entire range to create a complete protein are ratios of 1:0.04 to 1:30 for red bell pepper to spirulina by weight. 
                      
                      
                        Full nutritional profile for spirulina 
                        USDA Source: Seaweed, spirulina, dried
                    
| Amino Acid | % of RDV [2] | Amount [9] | 
                            Complete / Adequate  | 
                        |
| Protein | 
                               | 
                            16.3% | 8.1g | |
| Histidine | 
                               | 
                            23.8% | 0.15g | |
| Isoleucine | 
                               | 
                            43.5% | 0.37g | |
| Leucine | 
                               | 
                            31% | 0.59g | |
| Lysine | 
                               | 
                            22.8% | 0.39g | |
| Methionine | 
                               | 
                            15.2% | 0.13g | |
| Phenylalanine | 
                               | 
                            26.7% | 0.4g | |
| Threonine | 
                               | 
                            43.9% | 0.39g | |
| Tryptophan | 
                               | 
                            47.1% | 0.12g | |
| Valine | 
                               | 
                            39.7% | 0.43g | 
                          
                      
                                              
                          
                          
                                              
                      Lotus seed is a reasonable source of supplementary protein, and  is high in isoleucine, leucine, lysine, methionine and valine,  complementing the profile of red bell pepper. 
For example, 0.6 red bell pepper (103g) and 1.6 cups of lotus seeds (51g) make a complete amino acids profile. In fact, any ratio of more than 0.5:1 of lotus seed to red bell pepper will be complete. 
                      
                      
                        Full nutritional profile for lotus seeds 
                        USDA Source: Seeds, lotus seeds, dried
                    
| Amino Acid | % of RDV [2] | Amount [10] | 
                            Complete / Adequate  | 
                        |
| Protein | 
                               | 
                            17.7% | 8.9g | |
| Histidine | 
                               | 
                            37.5% | 0.24g | |
| Isoleucine | 
                               | 
                            47.7% | 0.41g | |
| Leucine | 
                               | 
                            34.6% | 0.65g | |
| Lysine | 
                               | 
                            31.4% | 0.54g | |
| Methionine | 
                               | 
                            16.5% | 0.14g | |
| Phenylalanine | 
                               | 
                            29.6% | 0.44g | |
| Threonine | 
                               | 
                            46.8% | 0.42g | |
| Tryptophan | 
                               | 
                            47.8% | 0.12g | |
| Valine | 
                               | 
                            49.6% | 0.54g | 
                          
                      
                                              
                          
                          
                                              
                      A great source of protein, dijon mustard is high in isoleucine, leucine, lysine, methionine and valine,  which is complementary to red bell pepper. 
A ratio of 1.3 red bell pepper (205g) and 5.2 tablespoons of dijon mustard (31g) creates a complete protein profile. In fact, any ratio of more than 0.15:1 of dijon mustard to red bell pepper will be complete. 
                      
                      
                        Full nutritional profile for dijon mustard 
                        USDA Source: Spices, mustard seed, ground
                    
| Amino Acid | % of RDV [2] | Amount [11] | 
                            Complete / Adequate  | 
                        |
| Protein | 
                               | 
                            20.4% | 10.2g | |
| Histidine | 
                               | 
                            49.1% | 0.31g | |
| Isoleucine | 
                               | 
                            48% | 0.41g | |
| Leucine | 
                               | 
                            38.3% | 0.72g | |
| Lysine | 
                               | 
                            38% | 0.65g | |
| Methionine | 
                               | 
                            19% | 0.16g | |
| Phenylalanine | 
                               | 
                            31.5% | 0.47g | |
| Threonine | 
                               | 
                            38.2% | 0.34g | |
| Tryptophan | 
                               | 
                            40.2% | 0.1g | |
| Valine | 
                               | 
                            49.6% | 0.54g | 
                          
                          
                                              
                      Crimini mushroom is a reasonable source of supplementary protein, and  is high in isoleucine, leucine, lysine, methionine and valine,  complementing the profile of red bell pepper. 
For example, 0.3 red bell pepper (53g) and 2.5 cups of crimini mushroom (218g) make a complete amino acids profile. In fact, any ratio of more than 4:1 of crimini mushroom to red bell pepper will be complete. 
                      
                      
                        Full nutritional profile for crimini mushroom 
                        USDA Source: Mushrooms, brown, italian, or crimini, raw
                    
| Amino Acid | % of RDV [2] | Amount [12] | 
                            Complete / Adequate  | 
                        |
| Protein | 
                               | 
                            11.9% | 6g | |
| Histidine | 
                               | 
                            24.6% | 0.15g | |
| Isoleucine | 
                               | 
                            26.4% | 0.23g | |
| Leucine | 
                               | 
                            18.6% | 0.35g | |
| Lysine | 
                               | 
                            33.2% | 0.57g | |
| Methionine | 
                               | 
                            12.5% | 0.11g | |
| Phenylalanine | 
                               | 
                            15.9% | 0.24g | |
| Threonine | 
                               | 
                            29.7% | 0.27g | |
| Tryptophan | 
                               | 
                            49.3% | 0.13g | |
| Valine | 
                               | 
                            24.7% | 0.27g | 
                          
                      
                                              
                          
                          
                                              
                      A reasonable source of supplementary protein, spinach is high in isoleucine, leucine, lysine, methionine and valine,  which is complementary to red bell pepper. 
A ratio of 1.1 red bell pepper (182g) and 8.4 cups of spinach (253g) creates a complete protein profile. In fact, any ratio of more than 1.4:1 of spinach to red bell pepper will be complete. 
                      
                      
                        Full nutritional profile for spinach 
                        USDA Source: Spinach, raw
                    
| Amino Acid | % of RDV [2] | Amount [13] | 
                            Complete / Adequate  | 
                        |
| Protein | 
                               | 
                            18.1% | 9g | |
| Histidine | 
                               | 
                            30.7% | 0.19g | |
| Isoleucine | 
                               | 
                            47.7% | 0.41g | |
| Leucine | 
                               | 
                            33.4% | 0.63g | |
| Lysine | 
                               | 
                            29.6% | 0.51g | |
| Methionine | 
                               | 
                            16.9% | 0.14g | |
| Phenylalanine | 
                               | 
                            28% | 0.42g | |
| Threonine | 
                               | 
                            42.5% | 0.38g | |
| Tryptophan | 
                               | 
                            46.3% | 0.12g | |
| Valine | 
                               | 
                            43% | 0.46g | 
                          
                      
                                              
                          
                          
                                              
                      Pistachio is a great source of protein, and  is high in isoleucine, leucine, lysine, methionine and valine,  complementing the profile of red bell pepper. 
For example, 0.8 red bell pepper (137g) and 0.3 cup of pistachio (36g) make a complete amino acids profile. In fact, any ratio of more than 0.26:1 of pistachio to red bell pepper will be complete. 
                      
                      
                        Full nutritional profile for pistachio 
                        USDA Source: Nuts, pistachio nuts, dry roasted, without salt added
                    
| Amino Acid | % of RDV [2] | Amount [14] | 
                            Complete / Adequate  | 
                        |
| Protein | 
                               | 
                            17.8% | 8.9g | |
| Histidine | 
                               | 
                            34.1% | 0.21g | |
| Isoleucine | 
                               | 
                            43.3% | 0.37g | |
| Leucine | 
                               | 
                            34.4% | 0.65g | |
| Lysine | 
                               | 
                            27.8% | 0.48g | |
| Methionine | 
                               | 
                            16.6% | 0.14g | |
| Phenylalanine | 
                               | 
                            32% | 0.48g | |
| Threonine | 
                               | 
                            34.5% | 0.31g | |
| Tryptophan | 
                               | 
                            42.3% | 0.11g | |
| Valine | 
                               | 
                            47.2% | 0.51g | 
                          
                      
                                              
                          
                          
                                              
                      A reasonable source of supplementary protein, poppy seed is high in isoleucine, leucine, lysine, methionine and valine,  which is complementary to red bell pepper. 
A ratio of 2.5 red bell pepper (410g) and 0.3 cup of poppy seeds (36g) creates a complete protein profile. The entire range to create a complete protein are ratios of 1:0.09 to 1:35 for red bell pepper to poppy seed by weight. 
                      
                      
                        Full nutritional profile for poppy seeds 
                        USDA Source: Spices, poppy seed
                    
| Amino Acid | % of RDV [2] | Amount [15] | 
                            Complete / Adequate  | 
                        |
| Protein | 
                               | 
                            21% | 10.5g | |
| Histidine | 
                               | 
                            37.9% | 0.24g | |
| Isoleucine | 
                               | 
                            44.1% | 0.38g | |
| Leucine | 
                               | 
                            32.8% | 0.62g | |
| Lysine | 
                               | 
                            28.6% | 0.49g | |
| Methionine | 
                               | 
                            23.8% | 0.2g | |
| Phenylalanine | 
                               | 
                            32% | 0.48g | |
| Threonine | 
                               | 
                            45.5% | 0.41g | |
| Tryptophan | 
                               | 
                            44.2% | 0.11g | |
| Valine | 
                               | 
                            48.1% | 0.52g | 
                          
                      
                                              
                          
                          
                                              
                      Sour cream is a reasonable source of supplementary protein, and  is high in isoleucine, leucine, lysine, methionine and valine,  complementing the profile of red bell pepper. 
For example, 3.3 red bell pepper (547g) and 0.7 cup of sour cream (139g) make a complete amino acids profile. In fact, any ratio of more than 0.25:1 of sour cream to red bell pepper will be complete. 
                      
                      
                        Full nutritional profile for sour cream 
                        USDA Source: Cream, sour, cultured
                    
| Amino Acid | % of RDV [2] | Amount [16] | 
                            Complete / Adequate  | 
                        |
| Protein | 
                               | 
                            17.6% | 8.8g | |
| Histidine | 
                               | 
                            35.1% | 0.22g | |
| Isoleucine | 
                               | 
                            39.7% | 0.34g | |
| Leucine | 
                               | 
                            34.1% | 0.65g | |
| Lysine | 
                               | 
                            33.9% | 0.58g | |
| Methionine | 
                               | 
                            16.4% | 0.14g | |
| Phenylalanine | 
                               | 
                            33% | 0.49g | |
| Threonine | 
                               | 
                            46.3% | 0.42g | |
| Tryptophan | 
                               | 
                            47.7% | 0.12g | |
| Valine | 
                               | 
                            40.8% | 0.44g | 
                          
                          
                                              
                      Low in protein, caramel is high in isoleucine, leucine, lysine, methionine and valine,  which is complementary to red bell pepper. 
A ratio of 3.3 red bell pepper (547g) and 0.9 cup of caramel (308g) creates a complete protein profile. The entire range to create a complete protein are ratios of 1:0.6 to 1:0.07 for red bell pepper to caramel by weight. 
                      
                      
                        Full nutritional profile for caramel 
                        USDA Source: Toppings, butterscotch or caramel
                    
| Amino Acid | % of RDV [2] | Amount [17] | 
                            Complete / Adequate  | 
                        |
| Protein | 
                               | 
                            18.3% | 9.1g | |
| Histidine | 
                               | 
                            34.3% | 0.22g | |
| Isoleucine | 
                               | 
                            45.2% | 0.39g | |
| Leucine | 
                               | 
                            33.8% | 0.64g | |
| Lysine | 
                               | 
                            32.6% | 0.56g | |
| Methionine | 
                               | 
                            17.1% | 0.15g | |
| Phenylalanine | 
                               | 
                            33% | 0.49g | |
| Threonine | 
                               | 
                            46.8% | 0.42g | |
| Tryptophan | 
                               | 
                            25.2% | 0.07g | |
| Valine | 
                               | 
                            43.6% | 0.47g | 
                          
                      
                                              
                          
                          
                                              
                      Yogurt is a reasonable source of supplementary protein, and  is high in isoleucine, leucine, lysine, methionine and valine,  complementing the profile of red bell pepper. 
For example, 3.3 red bell pepper (547g) and 0.5 cup of yogurt (117g) make a complete amino acids profile. The entire range to create a complete protein are ratios of 1:0.21 to 1:0.37 for red bell pepper to yogurt by weight. 
                      
                      
                        Full nutritional profile for yogurt 
                        USDA Source: Yogurt, plain, whole milk
                    
| Amino Acid | % of RDV [2] | Amount [18] | 
                            Complete / Adequate  | 
                        |
| Protein | 
                               | 
                            18.9% | 9.5g | |
| Histidine | 
                               | 
                            30.7% | 0.19g | |
| Isoleucine | 
                               | 
                            39% | 0.34g | |
| Leucine | 
                               | 
                            32.1% | 0.61g | |
| Lysine | 
                               | 
                            32.8% | 0.56g | |
| Methionine | 
                               | 
                            17.7% | 0.15g | |
| Phenylalanine | 
                               | 
                            33.2% | 0.49g | |
| Threonine | 
                               | 
                            42.7% | 0.38g | |
| Tryptophan | 
                               | 
                            34.3% | 0.09g | |
| Valine | 
                               | 
                            46.7% | 0.5g | 
                          
                      
                                              
                          
                          
                                              
                      Low in protein, mayonnaise is high in isoleucine, leucine, lysine, methionine and valine,  which is complementary to red bell pepper. 
A ratio of 3.3 red bell pepper (547g) and 1.5 cups of mayonnaise (322g) creates a complete protein profile. In fact, any ratio of more than 0.6:1 of mayonnaise to red bell pepper will be complete. 
                      
                      
                        Full nutritional profile for mayonnaise 
                        USDA Source: Salad dressing, mayonnaise, regular
                    
| Amino Acid | % of RDV [2] | Amount [19] | 
                            Complete / Adequate  | 
                        |
| Protein | 
                               | 
                            17% | 8.5g | |
| Histidine | 
                               | 
                            28.1% | 0.18g | |
| Isoleucine | 
                               | 
                            37.7% | 0.32g | |
| Leucine | 
                               | 
                            26.6% | 0.5g | |
| Lysine | 
                               | 
                            25.1% | 0.43g | |
| Methionine | 
                               | 
                            16.9% | 0.15g | |
| Phenylalanine | 
                               | 
                            30.7% | 0.46g | |
| Threonine | 
                               | 
                            44% | 0.4g | |
| Tryptophan | 
                               | 
                            46.3% | 0.12g | |
| Valine | 
                               | 
                            37.8% | 0.41g |