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Carbs vs protein: no extra muscle gains found

NCT ID NCT07600138

Completed Knowledge-focused Sponsor: Auburn University Source: ClinicalTrials.gov ↗

First seen Jun 24, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study looked at whether adding extra carbohydrates to a daily protein supplement helps resistance-trained men build more muscle and strength. Twenty-five men took either a protein-only or a protein-plus-carb supplement for 8 weeks each. The results showed no significant difference in muscle size, strength, or endurance between the two groups, suggesting that modest extra carbs may not enhance training outcomes.

What this could mean

Our plain-language read of the trial. This is informational only — not medical advice or a prediction.

Active substance
Whey protein and maltodextrin (carbohydrate) supplement
What this could lead to
If confirmed, this could help refine nutrition guidelines for resistance training, showing that extra carbs beyond protein may not improve muscle gains.
What could go wrong
This was a small study (25 men) with trained participants only, so results may not apply to beginners or women. The modest carb increase may not be enough to see effects.

This is an AI summary of the original study and may miss details. Read our disclaimer.

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Conditions

The condition(s) this trial relates to.

myostatin-related muscle hypertrophy

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

MUSCLE HYPERTROPHY STRENGTH

Contacts and locations

Locations

  • School of Kinesiology

    Auburn, Alabama, 36879-5432, United States

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