The experts contradict each other. The science keeps changing. Here's what actually holds up.
We read every video from the top longevity experts — and the studies they cite — so you see where they agree, where they don't, and the evidence behind every claim. Cited, timestamped, in plain English.
Consensus Report
Magnesium
You're making health decisions on incomplete information
The experts you trust have published 3,400+ videos — and the science shifts every month. You've seen maybe 2% of it. The rest is where the dosages, the caveats, and the changed positions live.
Conflicting recommendations
Huberman recommends magnesium threonate. Attia prefers glycinate. Patrick says both. Which do you take?
It keeps changing
What was settled science last year gets quietly walked back this year. Nobody has time to track every update across 3,400 hours of video.
Confident answers, no sources
Ask ChatGPT and you get a fluent answer with no source — and sometimes a study that doesn't exist.
Every claim, traced back to the evidence
Every transcript, every mention, every recommendation across every expert we track — cross-referenced into one clear report, with the source video and timestamp behind each claim.
Exact dosages and timing most experts agree on.
Where experts diverge — and why.
Ask the full transcript database — every answer cited to its source.
Consensus Report
Magnesium
Experts Recommend
Strong Consensus
Four of five experts actively recommend magnesium supplementation for sleep, cognition, and bone health. The primary debate is around form — Attia favors carbonate, Patrick recommends glycinate — not whether to take it.
Expert Positions
How It Works
From raw video to actionable consensus in three steps.
We watch everything
AI analyzes every video, every mention, every recommendation across every expert channel. No clip is too old or too obscure.
We find the consensus
Cross-reference positions. Score agreement. Flag where they clash and why. No opinion is ignored or overweighted.
You make confident decisions
Clear reports with consensus scores, dosages, and timing. Stop the research rabbit hole — know what the experts actually agree on.
25 Topics. Top Experts. Scored by Consensus.
Every topic scored by consensus. Free reports show you where experts stand. Pro unlocks exactly what to take, how much, and when.
Magnesium
Threonate vs Glycinate
Creatine
Dosage & Timing
Vitamin D
Dosage & Cofactors
Sleep Protocol
Temp, Light, Supps
Zone 2 Training
Protocol & HR Targets
NMN / NAD+
Which One & Dosage
+ 19 more topics including Omega-3, Fasting, Cold Exposure, Metformin, Rapamycin, and more
Browse All ReportsAsk anything. Get answers backed by 3,400+ videos.
Expert AI Chat searches across every video from all the experts and returns evidence-based answers with source citations. Like having a research assistant who watched everything.
Every answer traces back to a real expert, a real video, and a real timestamp. No hallucinations, no made-up studies.
Should I take creatine if I'm over 40? Any risks?
4 of 5 experts recommend creatine for adults over 40, with particular emphasis on cognitive benefits that increase with age.
Huberman and Patrick both highlight emerging research on creatine's neuroprotective effects. Attia recommends it as part of his standard longevity protocol regardless of age. Standard dose: 5g/day monohydrate.
The one caveat: Johnson excludes it from his protocol due to potential interaction with his specific kidney markers, but notes this is individual.
Sources: Huberman Lab #312 (1:23:45), The Drive #298 (0:44:12), FoundMyFitness #201 (0:32:08)
Expert AI Chat is included with Precis Pro.
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The average health optimizer spends $214/month on supplements. The consensus stack? $60–90. If Precis helps you drop what doesn't have consensus support, it pays for itself in month one.
Questions
Straight answers.
What supplements do longevity experts actually agree on?
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Based on our analysis of 3,400+ videos, the consensus stack — what every expert agrees on — is: Omega-3 (4.8/5), Creatine (4.6/5), Sauna (4.6/5), and Magnesium (4.1/5). The lowest are NMN/NAD+ (2.3/5) and GLP-1 drugs (2.6/5). The cheap, boring supplements have the most agreement. The expensive, trendy ones are where experts fight. We score 53 supplements total across 36 full reports.
Which experts and scientists does Precis analyze?
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Six channels: Andrew Huberman, Peter Attia, Rhonda Patrick, Bryan Johnson, Mark Hyman, and Diary of a CEO. This includes 1,000+ guest scientists — researchers like Dr. Layne Norton (creatine, protein), Dr. Andy Galpin (exercise physiology), Dr. Matthew Walker (sleep), Dr. Darren Candow (bone health), Dr. Bill Harris (omega-3), Dr. Gabrielle Lyon (muscle health), and Dr. Stacy Sims (women's health). Every recommendation traces back to a specific video and timestamp.
How does the consensus scoring work?
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Each supplement is scored 0-5 based on how many of the 5 core experts independently recommend it. A score of 5.0 means all experts strongly agree. Below 3.0 means they actively disagree. Scores come from 3,559 video summaries with citations to specific timestamps. We track stance strength — strongly recommends, recommends, nuanced/cautious, or disagrees — so you can see exactly where and why experts diverge.
Is this medical advice?
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No. We synthesize what experts say publicly in their videos and podcasts. Precis is an information tool, not a medical provider. Every claim links back to its source video and timestamp so you can verify it yourself. Always consult your doctor before making changes to your health routine.
How often are reports updated?
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Monthly, or sooner when an expert significantly changes their position. We track position changes over time so you can see when and why an expert updated their recommendation. Pro subscribers get alerts when expert stances change for supplements in their stack.
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