What the research found

A meta-analysis of HMB supplementation in adults over 50 found no meaningful effect on muscle gain, fat loss, or strength when added to resistance training. The evidence suggests that the supplement itself contributes little beyond what structured training and adequate nutrition already provide.

A separate systematic review examined nandrolone decanoate, an anabolic steroid used clinically and off-label. While it reliably increased lean body mass, the gains did not translate consistently into improved grip strength, functional capacity, or bone density. This suggests a disconnect between tissue mass and actual performance or health markers.

A third study of Brazilian wheelchair basketball athletes documented sex-based differences in shoulder strength, with men showing substantially greater capacity across most metrics tested. The findings point to the need for sex-specific training design and injury prevention strategies in adaptive athletes.

Why it matters for you

If you're tracking body composition and considering HMB as a lever, the data argue against it. Your time and money are better spent on progressive resistance training and hitting protein targets—the fundamentals that actually drive change in your 50s and beyond. This applies whether you're using MyKine to log lifting sessions or monitor strength biomarkers.

For those using testosterone replacement or exploring other androgens: visible muscle gain on a DEXA or tape measure doesn't guarantee the functional or structural improvements you might expect. If your goal is sustained performance, healthspan, and reduced injury risk, focus first on progressive overload in the gym and nutrient adequacy. Pharmaceutical interventions should be justified by improvements in grip strength, mobility, or bone density—not mirror gains alone.

Finally, if you're programming for yourself or others, recognise that sex is a material variable in upper body strength capacity. Blanket training prescriptions miss the opportunity to personalise load, volume, and recovery based on individual baselines and recovery patterns. Track your actual performance metrics, not just effort.

Caveats

• HMB finding is a meta-analysis (pooled evidence, quality depends on included trials)
• Nandrolone review is systematic (narrative synthesis; no head-to-head RCTs reported)
• Wheelchair basketball study is small, single-country, and specific to adaptive athletes—may not generalise to general population
• All three are observational or review-based; none are large RCTs in the general MyKine user population
• Nandrolone carries regulatory and safety issues outside clinical settings