Table 1

Approximate Essential Amino Acid Profile of Various Protein Sources

ESSENTIAL AMINO ACID

MILK PROTEIN ISOLATE

WHEY PROTEIN ISOLATE

WHEY PROTEIN HYDROL.

CASEIN

SOY PROTEIN ISOLATE

EGG PROTEIN

Isoleucine

4.4

6.1

5.5

4.7

4.9

5.7

Leucine

10.3

12.2

14.2

8.9

8.2

8.4

Lysine

8.1

10.2

10.2

7.6

6.3

6.8

Methionine

3.3

3.3

2.4

3.0

1.3

3.4

Phenylalanine

5.0

3.0

3.8

5.1

5.2

5.8

Threonine

4.5

6.8

5.5

4.4

3.8

4.6

Tryptophan

1.4

1.8

2.3

1.2

1.3

1.2

Valine

5.7

5.9

5.9

5.9

5.0

6.4

Total BCAAs

20.4

24.2

25.6

19.5

18.1

20.4

Total EAAs

42.7

49.2

49.8

40.7

36.0

42.3

Approximate concentration of essential and branched chain amino acids (EAA and BCAA, respectively) present within various forms of commercially available protein (g/100 g). Adapted from [27]. Casein is the average of reported values for Calcium Caseinate, Sodium Caseinate, and Potassium Caseinate; Whey Protein Isolate is the average of reported values for Ion-Exchange and Cross-Flow Microfiltrated Whey Protein Isolates. Hydrol. is hydrolysate.

Hulmi et al. Nutrition & Metabolism 2010 7:51   doi:10.1186/1743-7075-7-51