Journal
BRITISH JOURNAL OF NUTRITION
Volume 126, Issue 12, Pages 1832-1842Publisher
CAMBRIDGE UNIV PRESS
DOI: 10.1017/S0007114521000635
Keywords
Muscle protein synthesis; Plant-based proteins; Dairy; Protein blends; Fractional synthesis rate; Young healthy males
Categories
Funding
- Tereos (Marckolsheim, France)
- Cargill (Minneapolis, MN, USA)
- Kellogg (Battle Creek, MI, USA)
- Top-sector AgriFood [AF-16504]
- TiFN (Wageningen, the Netherlands), a public-private partnership on precompetitive research in food and nutrition [16NH02]
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The study found that ingestion of 30 g milk protein, 30 g wheat protein, or a blend of 15 g wheat plus 15 g milk protein increases muscle protein synthesis rates in young males. Furthermore, there were no significant differences in muscle protein synthesis rates following the ingestion of 30 g milk protein compared to 30 g wheat protein or a blend of 15 g milk plus 15 g wheat protein in healthy, young males.
Plant-derived proteins have been suggested to have less anabolic properties when compared with animal-derived proteins. Whether blends of plant- and animal-derived proteins can compensate for their lesser anabolic potential has not been assessed. The present study compares post-prandial muscle protein synthesis rates following the ingestion of milk protein with wheat protein or a blend of wheat plus milk protein in healthy, young males. In a randomised, double-blind, parallel-group design, 36 males (23 (sd 3) years) received a primed continuous L-[ring-C-13(6)]-phenylalanine infusion after which they ingested 30 g milk protein (MILK), 30 g wheat protein (WHEAT) or a 30 g blend combining 15 g wheat plus 15 g milk protein (WHEAT+MILK). Blood and muscle biopsies were collected frequently for 5 h to assess post-prandial plasma amino acid profiles and subsequent myofibrillar protein synthesis rates. Ingestion of protein increased myofibrillar protein synthesis rates in all treatments (P < 0 center dot 001). Post-prandial myofibrillar protein synthesis rates did not differ between MILK v. WHEAT (0 center dot 053 (sd 0 center dot 013) v. 0 center dot 056 (sd 0 center dot 012) %center dot h(-1), respectively; t test P = 0 center dot 56) or between MILK v. WHEAT+MILK (0 center dot 053 (sd 0 center dot 013) v. 0 center dot 059 (sd 0 center dot 025) %center dot h(-1), respectively; t test P = 0 center dot 46). In conclusion, ingestion of 30 g milk protein, 30 g wheat protein or a blend of 15 g wheat plus 15 g milk protein increases muscle protein synthesis rates in young males. Furthermore, muscle protein synthesis rates following the ingestion of 30 g milk protein do not differ from rates observed after ingesting 30 g wheat protein or a blend with 15 g milk plus 15 g wheat protein in healthy, young males.
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