Evidence-graded, source-cited
Health, Graded
The calculators tell you a number. These sections tell you what is actually known — every claim graded on the same evidence ladder we use across the site, from trial-backed through to actively contradicted. Where the honest answer is “don’t buy that”, that’s the answer you get.
Foundations
The inputs with the largest effect sizes and the least to sell you.
- Sleep
The highest-leverage, least-monetisable health habit there is.
3 guides
- Longevity
The boring interventions have the human data. The exciting ones have mice.
3 guides
- Mind & Mood
Where the exercise evidence is strong and the hormone talk is mostly invented.
3 guides
Systems
Body systems where the search results are worst and the marketing loudest.
- Metabolic Health
Insulin, glucose, liver fat and the drugs that changed the conversation.
3 guides
- Gut Health
Strong evidence for fibre. Much weaker evidence for everything being sold.
3 guides
- Women's Health & Training
The cycle, the menopause transition, and the energy-availability problem nobody screens for.
3 guides
- Men's Health
Testosterone without the clinic ads, and the signals men ignore longest.
2 guides
- Diets & Food Debates
Fasting, ultra-processed food, and the myths that outlive every study.
3 guides
Performance
Training, joints and endurance — where load is usually the answer.
- Mobility, Joints & Bone
Loading beats stretching, strength beats posture, and bone responds to both.
4 guides
- Endurance & Hybrid Training
Zone 2 without the mysticism, fuelling without the guesswork, and the truth about the interference effect.
3 guides
Measure
Tests, devices and scores: which numbers earn their place.
- Wearables & Tracking
Which numbers on your wrist mean something, and which are confident guesses.
3 guides
- Testing & Screening
Which tests change what you do — and which just find something to worry about.
3 guides