The Popularity of β-Hydroxy-β-Methylbutyric Acid (HMB) as a Muscle Supplement Remains Strong

From sports nutrition to healthy aging, β-Hydroxy-β-Methylbutyric Acid (HMB) continues to earn a place in some of today's most popular muscle health supplements. Once primarily associated with strength training and athletic recovery, HMB has expanded into products designed to support active lifestyles, healthy aging, and muscle maintenance. As consumer interest in performance and longevity grows, manufacturers are increasingly incorporating HMB into innovative formulations, creating a need for reliable analytical testing to help verify product quality and label claims. 

What is HMB?

HMB is a metabolite of the amino acid leucine. Leucine is first metabolized to α-keto-isocaproate (KIC), and approximately 5% of KIC is then converted to HMB¹. Research suggests that HMB supports muscle protein synthesis through the mechanistic target of rapamycin (mTOR) pathway and helps reduce muscle protein degradation through the ubiquitin-proteasome proteolytic pathway^2,3. Because only limited amounts of HMB are produced through typical dietary protein intake, supplementation is commonly used to increase HMB availability. HMB supplements are available as HMB free acid and, more commonly, as calcium HMB. A daily serving of 3 grams of calcium HMB has been supported by data from early studies⁴.

How is HMB being used?

HMB supplementation has been used for many years to support skeletal muscle recovery and maintenance associated with intense exercise and strength training based on initial studies⁴. It continues to gain traction as a mainstream supplement and has expanded into applications for aging adults seeking to help mitigate age-related loss of skeletal muscle and strength associated with sarcopenia⁵. HMB is also commonly paired with creatine in sports nutrition products, complementing creatine’s role in strength support with HMB’s association with muscle recovery. As the market continues to grow, reliable analytical methods are essential to help verify product integrity and support quality programs.

How we can help

Eurofins Supplement & OTC Testing in Madison, WI has developed an analytical method for accurate quantitation of HMB in a variety of dietary supplements and raw materials, including drink mix powders, capsules, gummies, nutritional beverages, and infant formulas. This HPLC-UV method provides the separation capability needed for the challenging and complex ingredient profiles commonly found in dietary supplements. The ISO-accredited method offers a fit-for-purpose limit of quantification (LOQ) of 0.5%, supporting analysis of most fortified products. If needed, theoretical calcium and calcium monohydrate forms can be calculated from the HMB result using molecular weight conversion.

To learn more about our HMB testing capabilities, please reach out today.

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