Amino Acid Protein Calculator

Enter foods to make sure you are getting all the essential amino acids.
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Romaine Lettuce
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Tomatoes
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Raw Onions
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  • Calories 99 5% DV
  • Protein 3.6g 7% DV
  • Carbs 22g 8% DV
  • Fat 0.6g 1% DV
  • Fiber 5.5g 20% DV
  • Sugar 11g 23% DV
  • Amino Acid Score 17%
  • Lysine / Arginine 0.6
Amino Acid Bar Charts

Total Recommended Daily Intake

  • Cystine 8% RDI 23mg
  • Histidine 8% RDI 53mg
  • Isoleucine 5% RDI 70mg
  • Leucine 4% RDI 113mg
  • Lysine 6% RDI 133mg
  • Methionine 3% RDI 19mg
  • Phenylalanine 13% RDI 111mg
  • Threonine 9% RDI 94mg
  • Tryptophan 13% RDI 36mg
  • Tyrosine 6% RDI 55mg
  • Valine 5% RDI 86mg
Protein Comparison Table

Table Legend

  1. Romaine Lettuce
  2. Tomatoes
  3. Raw Onions
-- = missing data
Amino Acids
Food # 1 2 3 Total
Weight (g) 47 149 160 356
Essential  
Histidine (mg)
(%RDI)
10
(1%)
21
(3%)
22
(3%)
53
(8%)
Isoleucine (mg)
(%RDI)
21
(2%)
27
(2%)
22
(2%)
70
(5%)
Leucine (mg)
(%RDI)
36
(1%)
37
(1%)
40
(1%)
113
(4%)
Lysine (mg)
(%RDI)
30
(1%)
40
(2%)
62
(3%)
133
(6%)
Methionine (mg)
(%RDI)
7
(1%)
9
(1%)
3
(0%)
19
(3%)
Phenylalanine (mg)
(%RDI)
31
(3%)
40
(5%)
40
(5%)
111
(13%)
Threonine (mg)
(%RDI)
20
(2%)
40
(4%)
34
(3%)
94
(9%)
Tryptophan (mg)
(%RDI)
5
(2%)
9
(3%)
22
(8%)
36
(13%)
Valine (mg)
(%RDI)
26
(1%)
27
(1%)
34
(2%)
86
(5%)
Conditional  
Arginine (mg) 25
31
166
223
Cystine (mg)
(%RDI)
3
(1%)
13
(5%)
6
(2%)
23
(8%)
Glycine (mg) 23
28
40
91
Proline (mg) 21
22
19
63
Tyrosine (mg)
(%RDI)
12
(1%)
21
(2%)
22
(3%)
55
(6%)
Non-Essential  
Alanine (mg) 26
40
34
100
Aspartic acid (mg) 65
201
146
412
Betaine (mg) 0
0
0
0
Glutamic acid (mg) 84
642
413
1139
Hydroxyproline (mg) --
--
--
0
Serine (mg) 24
39
34
96
Lysine to Arginine Ratio of All Selected Foods: 0.6
Data Source
Romaine Lettuce
USDA Food Data Central Standard Release (Common)Omega-6 data was extrapolated from undifferentiated-Octadecadienoic Acid (18:2) acid.
Tomatoes
USDA Food Data Central Standard Release (Common)Omega-6 data was extrapolated from undifferentiated-Octadecadienoic Acid (18:2) acid.Iodine data is obtained from the USDA Iodine database.
Raw Onions
USDA Food Data Central Standard Release (Common)Omega-6 data was extrapolated from undifferentiated-Octadecadienoic Acid (18:2) acid.Iodine data is obtained from the USDA Iodine database.