A plain look at five popular supplements for men over 40, what the research found, and where it falls short.
Plenty of lists promise the best supplements for men over 40, but the research behind them is uneven. Here is what the reviews say about each one.
Overview
Training, sleep and hormones all shift in your 40s, and the supplement aisle tries to sell you a fix for each. A few products have decent trial data. Others rest on small or low-quality studies. Food and training come first. Supplements add a little at the edges.
Key things to know
- Creatine has the clearest muscle data, and the trials were in older adults who lifted weights.
- Omega-3s show modest muscle benefits at higher doses.
- Ashwagandha raised testosterone in men in pooled trials, but results varied a lot.
- Tongkat ali, rhodiola and tart cherry have weaker or narrower evidence.
What the evidence says
Creatine
A meta-analysis of older-adult trials found that creatine plus resistance training increased lean tissue mass and strength more than placebo. Taking it only on training days worked too.
Key takeaway: Creatine only pays off alongside lifting.
Omega-3 fatty acids
A meta-analysis of 10 trials in older adults found a small gain in muscle mass (0.33 kg). Doses above 2 g/day did better, at 0.67 kg. That is modest, so think of omega-3s as a bonus.
Ashwagandha
A 2026 meta-analysis of 23 trials found ashwagandha lowered cortisol and raised testosterone in men by 57.43 ng/dL. The authors flag heterogeneity and call for more standardized trials. If you take medication or have a medical condition, check with your doctor first.
Tongkat ali
A meta-analysis of five randomized trials reported higher total testosterone with Eurycoma longifolia. The authors say more research is needed before clinical use. Higher testosterone on a lab test is also not the same as more muscle.
Rhodiola
A systematic review found that only two of six trials on physical fatigue in healthy people showed a benefit. Every included study had a high risk of bias or reporting flaws.
Tart cherry
A meta-analysis of 14 studies found a small reduction in muscle soreness (effect size -0.44) and a moderate improvement in strength recovery (-0.78) after hard exercise. It helps after tough sessions. It is not a muscle builder.
Putting it into practice
Start with one supplement, not five. Creatine is the easiest case if you lift. Most guys fall short on protein long before supplements matter, so spread it across the day; our guide to protein needs after 40 covers how.
This is where Proteinly helps. It is a protein-first app with no calorie counting, and its automatic eating timer reminds you to eat every 2 hours so protein becomes a habit.
Frequently asked questions
Do I need all five?
No. The evidence is strongest for creatine, then omega-3s. The rest are optional.
Can supplements replace a good diet?
No. The trials above tested them on top of normal eating and, for creatine, training.
Conclusion
If you take one thing from this, make it a supplement with real data behind it, on top of regular training and enough protein. Build the habit with the Proteinly app, read more on the articles page, and follow us on Instagram, TikTok and YouTube. Build the Habit. Build the Body.