Supplements

HMB + EPA/DHA supplementation increases postabsorptive net protein breakdown in COPD patients

In a 10-week RCT, HMB + EPA/DHA (but not EPA/DHA alone) significantly increased postabsorptive net protein breakdown (p=0.028) and whole body production of glutamine, taurine, and tyrosine in COPD patients. Both EPA/DHA and HMB + EPA/DHA increased lean soft tissue, but only HMB + EPA/DHA reduced whole body and extremity fat mass.

1 min read•Updated Jul 7, 2026•1 RCTs•View structured evidence →
Evidence Score44/100
Human RCT★★☆☆☆
Meta-analysis☆☆☆☆☆
Mechanism★★★★★
Safety★★★★☆
Confidencelow

This article is automatically generated from the structured evidence profile behind the claim above. Scores reflect the quality and quantity of available research, not clinical advice.

HMB + EPA/DHA supplementation increases postabsorptive net protein breakdown in COPD patients The current body of evidence comprises 1 study, including 1 randomized controlled trial. EvidenceHub rates the overall confidence at 44/100 (low).

The Claim

HMB + EPA/DHA supplementation increases postabsorptive net protein breakdown in COPD patients

This conclusion is most relevant to: Patients with moderate to very severe COPD (GOLD II-IV, n=46).

What the Research Shows

The conclusion draws on 1 linked study. Highlights from the cited literature:

  • ▸Functional and metabolic effects of omega-3 polyunsaturated fatty acid supplementation and the role of β-hydroxy-β-methylbutyrate addition in chronic obstructive pulmonary disease: A randomized clinical trial. (Clinical nutrition (Edinburgh, Scotland), 2024) —

How It Works

The proposed biological pathway:

  • ▸HMB + EPA/DHA supplementation increases net protein breakdown
  • ▸This may indicate enhanced protein turnover cycling
  • ▸Increased turnover supports lean soft tissue gain
  • ▸Result: Increased lean soft tissue and reduced fat mass

Who Might Benefit

Evidence fit by population:

  • ▸Patients with moderate to very severe COPD (GOLD II-IV, n=46)

Limitations & Caveats

Important context when interpreting this evidence:

  • ▸Small sample size (n=46 total, 14-16 per group)
  • ▸Whether HMB alone or synergistic with EPA/DHA causes fat loss remains unclear
  • ▸No significant improvements in muscle function, brain health, or quality of life were observed

Frequently Asked Questions

What is the primary finding of this study?▼

HMB combined with EPA/DHA increased net protein breakdown and reduced fat mass in COPD patients, while EPA/DHA alone increased lean soft tissue but did not affect fat loss.

How long was the supplementation period?▼

The intervention lasted 10 weeks.

Did the supplements improve muscle function or quality of life?▼

No significant improvements were found in muscle function, brain health, daily functional performance, or quality of life.

What was the dose of EPA/DHA and HMB used?▼

Patients received 2.0 g of EPA/DHA and 3.0 g of Ca-HMB daily.

References

  1. 1.Engelen MPKJ, Simbo SY, Ruebush LE, Thaden JJ, Ten Have GAM, Harrykissoon RI, Zachria AJ, Calder PC, Pereira SL, Deutz NEP. “Functional and metabolic effects of omega-3 polyunsaturated fatty acid supplementation and the role of β-hydroxy-β-methylbutyrate addition in chronic obstructive pulmonary disease: A randomized clinical trial..” Clinical nutrition (Edinburgh, Scotland), 2024. PMID: 39181037 DOI: 10.1016/j.clnu.2024.08.004
Disclaimer: This article is auto-generated from structured research data for educational purposes only and is not medical advice. Evidence scores reflect the quality and quantity of available research, not clinical recommendations. Always consult a healthcare professional before starting any supplement or intervention.