Evidence verdicts
7 of 36 have strong consensus for: Fasting, Cold Exposure, Creatine, Sauna, Zone 2 Exercise, Magnesium, and Olive Oil. 5 of 36 have not enough evidence yet. Each verdict is worked out from every counted mention on the record.
Strong consensus for 7Leaning for 21Mixed 1Conflicting 1Leaning against 1Strong consensus against 0Not enough evidence 5
positive partly neutral negative Each researcher and each study counts once per claim, however often they come up.
Fasting is worth doing for health.
35 sources: 24 positive, 11 partly
Deliberate cold exposure is worth doing.
20 sources: 15 positive, 4 partly, 1 negative
Creatine is worth taking.
11 sources: 8 positive, 2 partly, 1 neutral
Regular sauna use is worth doing for health.
11 sources: 8 positive, 3 partly
Zone 2 exercise is worth doing.
10 sources: 8 positive, 2 partly
Magnesium supplements are worth taking.
8 sources: 6 positive, 2 partly
Extra virgin olive oil is worth eating every day.
5 sources: 4 positive, 1 partly
Probiotic supplements or fermented foods are worth taking.
30 sources: 15 positive, 14 partly, 1 negative
GLP-1 drugs are worth taking for people with obesity.
18 sources: 6 positive, 9 partly, 3 negative
Omega-3 supplements are worth taking.
17 sources: 7 positive, 10 partly
Glutathione supplements are worth taking.
15 sources: 2 positive, 11 partly, 2 negative
Caffeine is worth using.
14 sources: 12 partly, 2 negative
Melatonin is worth taking for sleep.
13 sources: 3 positive, 9 partly, 1 negative
Vitamin D supplements are worth taking.
12 sources: 6 positive, 6 partly
Vitamin B12 supplements are worth taking.
10 sources: 1 positive, 9 partly
NAC is worth taking.
9 sources: 2 positive, 6 partly, 1 negative
Electrolyte supplements are worth taking.
8 sources: 3 positive, 5 partly
Sleep is the most important pillar of health and longevity.
8 sources: 4 positive, 4 partly
Ashwagandha is worth taking.
6 sources: 3 positive, 3 partly
Folate supplements are worth taking.
6 sources: 6 partly
Garlic is worth taking for health.
6 sources: 6 partly
Glycine is worth taking.
6 sources: 3 positive, 3 partly
Zinc supplements are worth taking.
6 sources: 2 positive, 4 partly
CoQ10 is worth taking.
5 sources: 2 positive, 2 partly, 1 negative
Vitamin C supplements are worth taking.
5 sources: 1 positive, 3 partly, 1 neutral
Iron supplements improve health only in people whose iron is low.
4 sources: 1 positive, 3 partly
Curcumin is worth taking.
3 sources: 2 positive, 1 partly
Selenium supplements are worth taking.
3 sources: 1 positive, 2 partly
Too few counted mentions to call either way. Each verdict updates as more mentions are counted.
Astaxanthin is worth taking.
2 sources: 1 positive, 1 partly
Berberine is worth taking.
2 sources: 2 partly
Low-dose rapamycin slows aging in healthy people.
2 sources: 2 negative
Vitamin K2 is worth taking.
2 sources: 2 positive
Sulforaphane is worth taking.
1 source: 1 partly
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Cite as: Precis Consensus Matrix, 36 topics, precis.health/tools/consensus-matrix, updated 29 June 2026.
This consensus matrix is free. A free account opens the dose, form and timing claims behind every row, each with its verdict and receipts. Pro adds the chat that answers from 3,700+ hours of recorded interviews with 380+ researchers and doctors, plus 87,700+ research studies.
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How this is built: Built from 3,700+ hours of recorded interviews with 380+ researchers and doctors, plus 87,700+ research studies. Updated Oct 27, 2026. Each verdict is computed from every counted mention of the topic's main claim, never written by hand. Click a row to read the full report with its receipts.