Muscle Mass and Lean Body Mass:
Several studies have demonstrated that HMB supplementation in Older Adults can help preserve or even increase lean body mass (LBM) in older adults. This effect is particularly noted in situations of muscle loss due to aging (sarcopenia), illness, or bed rest. A recent meta-analysis (April 2025) of 21 randomized controlled trials involving participants over 50 years old reported improvements in muscle mass with HMB oral supplementation.
HMB supplementation in Older Adults is crucial for maintaining overall health and wellness as they age.
Muscle Strength:
Furthermore, HMB supplementation in Older Adults enhances recovery from exercise, making it a vital part of their regimen.
HMB supplementation in Older Adults has consistently shown positive effects on muscle preservation and growth. Meta-analyses have concluded that HMB supplementation, often at a dose of 3 grams per day, can significantly improve muscle strength indicators like handgrip strength.
The role of HMB supplementation in Older Adults also extends to improved performance in daily activities.
Mitigation of Muscle Damage
Understanding the bioavailability of HMB supplementation in Older Adults is essential for maximizing its benefits.
HMB supplementation in Older Adults is known for its ability to attenuate exercise-induced muscle damage, which can indirectly contribute to protein sparing by supporting faster recovery and reducing the need for extensive repair.
Thus, HMB supplementation in Older Adults should be considered a key component of nutritional strategies.
Bioavailabilty of HMB Supplemented in Humans:
Calcium β-hydroxy-β-methylbutyrate (CaHMB) is a common supplemental form of HMB, a metabolite of the amino acid leucine. Its bioavailability in humans has been a subject of research, with comparisons often made to the free acid form of HMB (HMB-FA).
Here’s a summary of what studies indicate regarding the bioavailability of CaHMB:
Efficient Absorption: Studies have demonstrated that CaHMB is efficiently absorbed in the body, providing a steady supply of HMB in the plasma.
Many experts recommend HMB supplementation in Older Adults to combat age-related muscle loss effectively.
Adopting HMB supplementation in Older Adults can significantly enhance physical resilience.
Peak Plasma Concentration (Cmax) and Time to Peak (Tmax):
The benefits of HMB supplementation in Older Adults are well-documented in various clinical studies.
CaHMB in capsules or dissolved in water generally leads to rapid and large increases in plasma HMB concentrations.
One study found that CaHMB in water resulted in the fastest Tmax (around 43 minutes) compared to CaHMB in capsules (around 79 minutes) and HMB-FA (around 78 minutes). However, it is best taken by capsule as commercial flavored powders are a challenge due to the bitterness of HMB. It is well-tolerated by most individuals.
Utilizing HMB supplementation in Older Adults can lead to higher lean tissue mass and strength.
Future research will continue to explore the impacts of HMB supplementation in Older Adults.
Optimal Dosage and Duration:
Research suggests that a daily dosage of 3 grams of HMB is generally effective, and benefits are often more pronounced with supplementation durations exceeding 12 weeks.
Safety
Studies consistently indicate that HMB supplementation is well-tolerated with no significant adverse side effects reported, even at dosages higher than the commonly recommended 3 grams per day.
HMB Alone vs. HMB with Exercise/Other Nutrients:
: While HMB supplemented only has shown the benefits in muscle preservation and growth, (even in non-exercising older adults), its effects on muscle growth and strength are often optimized when combined with resistance exercise and/or other nutritional substrates like protein, arginine, and lysine.
Specific Populations
More research is needed to refine treatment choices combining HMB and exercises for particular populations of older adults, such as those with frailty, limited mobility, or specific health conditions. It is best to hire a trained and certified strength and conditioning professional specializing in the senior population.
Studies
1. Baier et al., 2009
Title: The Use of HMB, Arginine, and Lysine in Improving Lean Body Mass and Strength in Elderly Women
Journal: Nutrition
- Participants: 77 elderly women (average age ~76)
- Intervention: HMB (2g/day), arginine (5g/day), lysine (1.5g/day) for 12 weeks
- Results:
- Significant increase in lean body mass
- Improved strength and function
- Benefits seen even without resistance training
- Conclusion: HMB combined with arginine and lysine can improve muscle mass and strength in elderly women.
https://pubmed.ncbi.nlm.nih.gov/19164608
2. Vukovich et al., 2001
Title: Effect of HMB Supplementation on Strength and Body Composition of Older Men and Women
Journal: The Journal of Nutrition, Health & Aging
- Participants: Older adults, both sexes
- Intervention: 3g/day HMB for 8 weeks
- Results:
- Lean mass increased significantly in the HMB group
- Strength improvements, especially in resistance-trained individuals
- Conclusion: HMB can be beneficial for muscle preservation and gains in older adults.
https://pubmed.ncbi.nlm.nih.gov/11435528
3. Flakoll et al., 2004
Title: Effect of a nutritional supplement containing HMB, arginine, and lysine on muscle strength, functionality, body composition, and protein metabolism in elderly women
Journal: The Journal of Clinical Endocrinology & Metabolism
- Participants: 70+ year-old women
- Intervention: Same as Baier et al. (combo of HMB, arginine, lysine) for 12 weeks
- Results:
- Improved muscle function and protein synthesis
- Increased muscle mass
- Conclusion: Nutritional supplementation with HMB is effective for improving muscle health in elderly women.
https://pubmed.ncbi.nlm.nih.gov/15105032
4. Hsieh et al., 2010
Overall, HMB supplementation in Older Adults serves as a pivotal strategy for maintaining muscle health.
Title: Supplementation with β-Hydroxy-β-methylbutyrate (HMB) improves physical performance in older adults
Journal: Journal of Strength and Conditioning Research
- Participants: 30+ elderly adults
- Intervention: HMB 3g/day for 8 weeks
- Results:
- Improved muscle strength and physical performance (chair stands, walking tests)
- Conclusion: HMB supplementation can enhance physical function in aging adults.
https://pubmed.ncbi.nlm.nih.gov/20460233
5. Deutz et al.,2021 (NOURISH Trial)
Title: A high-protein oral nutritional supplement enriched with HMB improves muscle mass and function in older malnourished adults
Journal: Clinical Nutrition
- Participants: Older malnourished adults
- Intervention: High-protein HMB-containing supplement for 12 weeks
- Results:
- Increased muscle mass
- Improved mobility and clinical outcomes
- Conclusion: HMB is particularly effective in frail or malnourished older population
https://pubmed.ncbi.nlm.nih.gov/32921503
In conclusion, HMB supplementation in Older Adults is essential for promoting longevity and vitality.