HMB™ is a research proven product, that exhibits strong anti-catabolic properties, prevents
muscle breakdown, whilst also increasing strength, nitrogen retention and power, without the bulking up that comes with Creatine. HMB™ is superb at preserving muscle tissue when dieting down for contests or weight classes or anyone requiring
strength increases. Even more amazing is that at the 3gm daily dose HMB™ exerts strong fat burning properties, so you can now get strong, lean and hard.
This is what is said.(Independant Study).
Personally, i think that i did hold onto muscle when dieting, last comp came in harder and heavier and leaner

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(kept same eating and training from previous year)