Table 2 Leucine content of protein sources for studies that used a protein ingestion timing method
Research study | Protein used | Leucine content | Reached 3g Threshold for Leucine |
|---|---|---|---|
Hoffman et al.[31] | 42 g of a proprietary blend of protein (enzymatically hydrolyzed collagen protein isolate, whey protein isolate, and casein protein isolate) | 3.6 g | Yes |
Hoffman et al.[32] | 42 g of a proprietary protein blend (enzymatically hydrolyzed collagen protein isolate, whey protein isolate, casein protein isolate, plus 250 mg of additional branch chain amino acids) | 3.6 g | Yes |
Cribb et al.[33] | Whey protein, creatine and dextrose mixture based on individuals bodyweight | 3.49 g1 | Yes |
Verdijk et al.[34] | 20 g of casein split into two 10 g servings pre- and post-workout | 1.64 g total in 2 servings2 | No |
Hulmi et al.[35] | 30 g whey split into two 15 g servings pre- and post-workout | 3.4 g total in 2 servings | No as only 1.7 g were given at a time |
Andersen et al.[36] | 25 g of a protein blend (16.6 g of whey protein; 2.8 g of casein; 2.8 g of egg white protein; and 2.8 g of l-glutamine) | 2.29 g 2,3 | No |
Elliot et al.[37] | 237 g of whole milk | 0.639 g | No |
Hartman et al.[38] | 500 mL of fat-free milk | 1.35 g | No |
Wilkinson et al.[39] | 500 mL of fat-free milk | 1.35 g | No |
Rankin et al.[40] | Chocolate milk based on bodyweight | Unknown | Unknown |
Josse et al.[41] | 500 mL of fat-free milk | 1.35 g | No |