HMB free acid

Tier 2 — promising · Muscle · Rapid absorption · Athletic

The free acid form of HMB absorbs about twice as fast as the calcium salt form and reaches higher peak blood levels. A 2024 trial found 3 g free acid HMB taken 30 minutes before training significantly reduced muscle damage markers compared to placebo. Most useful for athletes in heavy training phases or people returning from injury. More expensive than HMB calcium. The faster absorption makes timing around workouts more effective.

Dose: 1 g × 3 daily (one dose 30 min pre-exercise); faster absorption than HMB calcium form