Taking HMB-free acid supplements raised levels of HMB in the blood of older men, showing the body absorbed it, but this did not lead to meaningful health improvements except for a minor gain in thigh muscle mass.

60

Pro

0

Against

Evidence from Studies

Supporting (1)

60

Community contributions welcome

60

A double-blind placebo controlled trial into the impacts of HMB supplementation and exercise on free-living muscle protein synthesis, muscle mass and function, in older adults

Randomized Controlled Trial

Human

2019 Oct

The study found that taking HMB-free acid helped older men gain a little more muscle in their thighs, but didn’t make them stronger or improve other functions more than exercise alone. So yes, it worked a little, but not much.

Contradicting (0)

0

Community contributions welcome

No contradicting evidence found

Gold Standard Evidence Needed

According to GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this specific claim, ordered from strongest to weakest evidence.

Source Study

A double-blind placebo controlled trial into the impacts of HMB supplementation and exercise on free-living muscle protein synthesis, muscle mass and function, in older adults

Score: 60

DOI: 10.1016/j.clnu.2018.09.025

Science Topic

Does HMB-free acid supplementation increase plasma HMB and muscle mass in older men?

Supported

We analyzed the available evidence and found that HMB-free acid supplementation increases plasma HMB levels in older men, meaning the body absorbs it as expected [1]. However, the changes in muscle mass were small — only a minor gain in thigh muscle was observed, with no other meaningful health improvements noted [1]. The evidence we’ve reviewed so far leans toward absorption occurring without strong or consistent benefits for muscle growth or overall health in this group. We did not find any studies that contradicted these findings, but the lack of broader effects suggests the increase in blood HMB does not reliably translate into noticeable physical changes. What we’ve found so far is limited to one assertion, and while absorption is confirmed, the practical impact remains unclear. For older men considering HMB-free acid, the evidence suggests it may raise blood levels of HMB, but it’s unlikely to produce significant gains in muscle or health outcomes based on what’s been observed.

2 items of evidenceView full answer

Similar Assertions

Taking HMB-free acid supplements raises levels of HMB in the blood of older men, but this does not lead to greater improvements in muscle building, gene activity, or physical function than resistance training by itself.

60

0

88%

In healthy men aged 67 to 69 who are doing progressive strength training for six weeks, taking 3 grams of HMB-free acid daily might be linked to a small increase in thigh muscle mass compared to a placebo, but this effect was not seen consistently in other muscle measurements or function tests.

60

0

87%

In healthy men aged 67 to 69, taking 3 grams of HMB-free acid daily while doing strength training led to a slightly greater increase in thigh muscle mass compared to a placebo, though the difference was not large enough to be considered statistically certain.

60

0

87%

In older men doing strength training, taking HMB-free acid supplements for six weeks did not lead to measurable improvements in strength, muscle size, or maximum force production compared to a placebo, even if there was a slight increase in lean mass.

60

0

84%

For older men doing strength training, taking HMB-free acid supplements does not lead to greater increases in muscle strength, muscle size, or maximum force production than taking a placebo over six weeks.

60

0

84%