Rapamycin, metformin and NMN get the headlines, but exercise has the strongest human evidence for a longer, healthier life. How they compare, honestly.
Exercise has far stronger human evidence for a longer, healthier life than any longevity supplement or drug currently available. Rapamycin, metformin and NMN are interesting research areas, but none has been shown to extend lifespan in healthy people, while regular exercise is linked to lower risk of death, disease and disability. If you can only spend your effort and money on one thing, spend it on training.
What the longevity drugs and supplements promise
Each compound has a story, and each has limits.
- Rapamycin extends lifespan in several animal species and is among the more promising candidates. It suppresses the immune system at higher doses, and there is no proof it extends human lifespan. Human trials in healthy people are still early.
- Metformin is a standard diabetes medicine that has been studied for ageing. It has not shown convincing lifespan benefit in healthy people. In a trial of older adults, it blunted some of the mitochondrial and insulin-sensitivity gains from aerobic training.
- NMN and NR are supplements designed to raise NAD⁺, a molecule involved in cell energy. Small human trials show they can raise blood NAD⁺ levels, but evidence that they improve health outcomes or extend life is thin.
- Resveratrol, “senolytic” blends and similar products are mostly supported by cell and animal studies.
The common thread is that they are promising in the lab, unproven in healthy humans, and not free of trade-offs.
What the human evidence says about exercise
The strongest data are on the exercise side. A WHO-backed analysis of physical activity links regular activity to lower rates of death, heart disease, type 2 diabetes, some cancers, depression and falls. A large cohort of adults who underwent treadmill testing found that higher cardiorespiratory fitness was associated with lower long-term mortality, with no upper limit to the benefit. A meta-epidemiological study comparing exercise and drug trials found exercise to be broadly comparable to many drug treatments on mortality for several conditions, such as secondary prevention of coronary heart disease and stroke rehabilitation.
Exercise also covers a lot of ground at once. The table compares what each approach does in practice.
| What matters for healthspan | Exercise | Typical longevity pill or supplement |
|---|---|---|
| Muscle and bone | Strength training builds and protects both | Little or no direct effect |
| Heart and metabolic health | Improves blood pressure, glucose and fat levels | Limited, drug-specific |
| Cardiorespiratory fitness | Directly raises VO₂ max | None |
| Falls and independence | Balance and strength cut falls | None |
| Mood and brain | Linked to better mood and cognition | Unproven |
| Safety record | Decades of data, mostly safe when scaled to ability | Variable, often short-term data |
| Cost | Free to modest | Ongoing monthly spend |
See strength training for longevity, Zone 2 cardio, VO₂ max training and balance and stability training for how each pillar works, and VO₂ max and lifespan for the fitness data.
Where supplements do fit
This is not a case that supplements are useless. A few have a sensible, evidence-based role.
- Creatine can modestly improve strength and lean mass when combined with resistance training.
- Vitamin D helps if blood tests show you are deficient, which is more common in Malaysia than people expect because of sun avoidance and covering.
- Protein from food or powder helps you reach your target, which matters for preserving muscle.
More in our guide to supplements for longevity in Malaysia. The rule is straightforward: supplements sit on top of the foundation and are never the foundation.
How to spot an overhyped product
- Claims that something “reverses ageing” or “adds decades”.
- Evidence based only on mice, cells or a small, unblinded trial.
- A biological-age test used as proof that a product works. See biological age testing, hype or helpful.
- Prices that are high and ongoing, with no clear measured outcome.
- Products with undeclared ingredients. Buy only from registered, reputable sources, and check Malaysian regulatory registration where applicable.
Safety and who should ask first
Prescription drugs such as rapamycin and metformin are medicines, and should only be used under a doctor’s care for an approved reason. Never stop or start prescription medicine because of something you read online. Get advice before any supplement if you:
- take regular medicine, especially blood thinners, diabetes or blood pressure drugs;
- have kidney or liver disease;
- are pregnant, breastfeeding or planning pregnancy;
- have a cancer history or are on treatment.
See exercise on common medications.
The honest takeaway
If you spent nothing on supplements and put everything into consistent training, good food and sleep, you would capture most of the longevity benefit available today. The drugs may prove valuable in time, but the training is proven now.
A practical weekly foundation
If you want to act on this, this is a realistic starting week for a healthy adult:
- Strength: two full-body sessions, 30 to 45 minutes each.
- Zone 2 cardio: three sessions of 30 to 45 minutes at a conversational pace.
- Intervals: one short, moderate-hard session if cleared for it.
- Balance: five minutes after most sessions. See balance exercises to prevent falls.
- Food and sleep: protein at each meal and seven to eight hours of sleep.
This costs little, and each part supports the others.
What about buying these online in Malaysia?
Some longevity compounds are sold online with bold claims. Rapamycin and metformin are prescription medicines and should come only from a doctor. Supplements sold online may be mislabelled or contaminated, and importing unregistered products carries legal and safety risks. If you want a supplement, discuss it with your doctor or pharmacist and choose products registered with the relevant Malaysian authority.
Key takeaways
- Exercise has the strongest, most consistent human evidence for a longer, healthier life.
- Rapamycin, metformin and NMN are promising in research but unproven for longevity in healthy people.
- Metformin may blunt some adaptations to aerobic training, so discuss any medicine with your doctor.
- A few supplements, such as creatine, vitamin D when deficient, and enough protein, support training but never replace it.
Putting the foundation in place is exactly what we do. A physiotherapist measures your baseline at home, builds a plan across strength, Zone 2, VO₂ max and stability, and re-tests at 12 weeks, in partnership with your doctor. If you are in KL or Selangor, book a home-visit assessment.