- Muscle, strength and fitness are among the strongest predictors of healthy aging, more than any supplement.
- A few supplements have solid support: creatine, vitamin D (if low), omega-3s and enough protein.
- Popular longevity products like NMN and resveratrol have little human evidence for extending healthspan.
- Testosterone and HGH aren’t anti-aging treatments for people with normal levels.
The longevity industry sells a lot of hope. This guide sorts the supplements with real evidence from those running mostly on marketing, and points to what actually matters for aging well.
What matters most
- Strength training: muscle loss with age (sarcopenia) drives frailty and falls
- Cardiorespiratory fitness: strongly linked to lower mortality
- Protein: needs rise with age; many older adults eat too little
- Sleep, not smoking, limited alcohol and managing blood pressure and cholesterol
Supplements with reasonable evidence
| Supplement | Evidence |
|---|---|
| Creatine | Helps older adults gain strength and muscle with training; early research on cognition |
| Vitamin D | Important for bone and muscle when deficient, common in Canada |
| Omega-3 (EPA/DHA) | Lowers triglycerides; supports heart health |
| Protein supplements | Useful when food intake is low |
| Collagen | Some evidence for skin hydration and elasticity |
Popular but unproven
- NMN and NR (NAD+ boosters): raise NAD+ levels in blood, but human evidence for slowing aging is lacking
- Resveratrol: early animal promise didn’t translate to clear human benefit
- Most “anti-aging” blends: little evidence for the combination
Hormones aren’t anti-aging drugs
Testosterone helps men with genuinely low levels, but for men with normal levels it doesn’t reverse aging and carries risks. Growth hormone in healthy older adults improves body composition modestly but causes side effects such as joint pain, fluid retention and higher blood sugar. See TRT in Canada and our HGH guide.
Buying in Canada
Look for a Natural Product Number (NPN) on natural health products, which shows Health Canada has reviewed them. Check our vitamin gaps guide before stacking products.
Frequently asked questions
What’s the best anti-aging supplement?
Creatine (with strength training), vitamin D if low, and omega-3s have the best support. Exercise matters more than any supplement.
Does NMN slow aging?
It raises NAD+ levels, but there’s no solid human evidence that it extends healthspan.
Is testosterone anti-aging?
Only for men with genuinely low levels, where it treats a deficiency.
Does collagen work?
There’s some evidence for skin hydration and elasticity; effects on joints are less clear.
This article is general information for adults in Canada, not medical advice. Talk to a doctor or pharmacist before using any prescription drug, anabolic steroid or research compound, and get bloodwork done. If you’re in crisis, call or text 9-8-8 (Suicide Crisis Helpline) any time.
