Which protein shake is best for older men's muscles after eating?
Whey protein stimulates postprandial muscle protein accretion more effectively than do casein and casein hydrolysate in older men.
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
Older men drank different protein shakes—whey, casein, or broken-down casein—and scientists checked how well their muscles used the protein.
No biological mechanisms were identified in this study. This may be an epidemiological, observational, or survey-based study that reports associations rather than proposing causal biological pathways.
Systematic Reviews & Meta-Analyses
Max 100Randomized Controlled Trials
Max 90Cohort Studies
Max 72Case-Control Studies
Max 58Cross-Sectional Studies
Max 44Case Reports & Case Series
Max 30Expert Opinion & Narrative Reviews
Max 548 / 90
Evidence Score
Participants are randomly assigned to treatment or control groups, minimizing bias. Considered the gold standard for testing whether an intervention causes an effect.
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
Older men drank different protein shakes—whey, casein, or broken-down casein—and scientists checked how well their muscles used the protein.
No biological mechanisms were identified in this study. This may be an epidemiological, observational, or survey-based study that reports associations rather than proposing causal biological pathways.
Systematic Reviews & Meta-Analyses
Max 100Randomized Controlled Trials
Max 90Cohort Studies
Max 72Case-Control Studies
Max 58Cross-Sectional Studies
Max 44Case Reports & Case Series
Max 30Expert Opinion & Narrative Reviews
Max 548 / 90
Evidence Score
Participants are randomly assigned to treatment or control groups, minimizing bias. Considered the gold standard for testing whether an intervention causes an effect.
Publication
Authors
Pennings B, Boirie Y, Senden JM, Gijsen AP, Kuipers H, van Loon LJ
Related Content
Claims (4)
Whey protein gives you a quick spike in amino acids in your blood, while casein keeps levels up longer — but overall, they give your body about the same amount of fuel, and neither one boosts muscle or energy-cell growth more during sleep.
For older guys around 74, drinking a shake with 20 grams of whey protein helps their muscles build new protein better after a meal than the same amount of casein or broken-down casein.
When older guys drink a whey or pre-digested casein protein shake, the protein shows up in their blood faster than when they drink regular casein — meaning it gets absorbed more quickly.
In older men, how much leucine shows up in the blood after eating protein seems to be closely linked to how much muscle their body makes afterward — the more leucine, the more muscle building.