Home Ingredients BetaTor® (HMB Free Acid)
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BetaTor® (HMB Free Acid)

Evidence Level
Strong
1 Clinical Trial
3 Documented Benefits
4/5 Evidence Score

BetaTor® is a free-acid form of HMB (beta-hydroxy-beta-methylbutyrate), a metabolite of the amino acid leucine that helps protect muscle from breakdown. The free-acid form is designed to be absorbed faster and reach the bloodstream at higher levels than the older calcium-bound HMB. It is used to support muscle preservation, strength, and recovery, especially around resistance training.

Studied Dose About 1 to 3 grams per day, often around training.
Active Compound Beta-hydroxy-beta-methylbutyrate (HMB) in the free-acid form, a leucine metabolite that supports muscle protein balance.

Benefits

Muscle preservation

HMB reduces muscle protein breakdown, helping preserve lean mass during intense training, calorie restriction, or periods of low activity.

Supported by Trial 1

Strength and recovery

Taken with resistance exercise, the free-acid form is studied for supporting strength gains and faster recovery between sessions.

Supported by Trial 1

Faster absorption

The free-acid form reaches the blood more quickly and at higher peak levels than calcium HMB, which is the rationale for the branded form.

Supported by Trial 1

Mechanism of action

1

Reduced protein breakdown

HMB suppresses the muscle-protein-degradation pathways activated by stress and exercise, tilting the balance toward muscle retention.

2

Support for protein synthesis

HMB also supports muscle protein synthesis signaling, complementing its anti-catabolic effect, especially alongside training.

Clinical trials

1
HMB Free Acid and Resistance Exercise — RCT
PubMed

Randomized study of HMB free-acid ingestion with resistance exercise on hormonal and recovery markers. (Townsend et al. 2015, International Journal of Endocrinology)

Resistance-trained men.

HMB free-acid ingestion around resistance exercise favorably affected markers related to muscle recovery and the anabolic response, supporting its use for training.

Side effects and drug interactions

Common Potential side effects

GENERALLY WELL-TOLERATED — HMB has a strong safety record.
Mild digestive upset is uncommon.
No stimulant effects.

Important Drug interactions

No significant drug interactions are established.
Generally safe alongside protein and creatine.
Tell your doctor if pregnant, breastfeeding, or managing a condition.

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Frequently asked questions about BetaTor® (HMB Free Acid)

What is BetaTor® (HMB Free Acid)?

BetaTor® is a free-acid form of HMB (beta-hydroxy-beta-methylbutyrate), a metabolite of the amino acid leucine that helps protect muscle from breakdown. The free-acid form is designed to be absorbed faster and reach the bloodstream at higher levels than the older calcium-bound HMB.

What is the recommended dosage of BetaTor® (HMB Free Acid)?

The clinically studied dose for BetaTor® (HMB Free Acid) is About 1 to 3 grams per day, often around training.. Always follow product labeling and consult a healthcare provider for personalized dosing recommendations.

What is BetaTor® (HMB Free Acid) used for?

BetaTor® (HMB Free Acid) is studied for muscle preservation, strength and recovery, faster absorption. HMB reduces muscle protein breakdown, helping preserve lean mass during intense training, calorie restriction, or periods of low activity.

Are there side effects from taking BetaTor® (HMB Free Acid)?

Reported potential side effects may include: GENERALLY WELL-TOLERATED — HMB has a strong safety record. Mild digestive upset is uncommon. Always consult a healthcare provider before starting any new supplement, especially if you have underlying conditions or take medications.

Is BetaTor® (HMB Free Acid) safe to take?

Whether BetaTor® (HMB Free Acid) is safe depends on the dose, your overall health, and any medications you take. At studied doses, reported side effects can include: GENERALLY WELL-TOLERATED — HMB has a strong safety record. It may also interact with certain medications. BetaTor® (HMB Free Acid) is not suitable for everyone — consult a healthcare provider before use if you are pregnant or breastfeeding, have a medical condition, or take prescription medications.

References(1 citations)

Evidence ratings on NutraSmarts are based on the totality of human clinical research, with emphasis on randomized controlled trials, meta-analyses, and systematic reviews. The references below directly support claims made throughout this page.

  1. Townsend JR, Hoffman JR, Gonzalez AM, et al. Effects of beta-Hydroxy-beta-methylbutyrate Free Acid Ingestion and Resistance Exercise on the Acute Endocrine Response. Int J Endocrinol. 2015;2015:856708..PubMedUsed to support: RCT supporting HMB free acid with resistance exercise.