Longevity, on the record
We don't summarize the experts. We count them.
We sell no supplement we score. No affiliate links. No sponsor. No storefront.
You already know they contradict each other. What nobody does is sit through all of it and keep score.
We did. Five experts, 3,700+ videos, one vote each. Every supplement you take comes back with a number out of five and the minute behind it.
- hours of expert podcasts
- 2,800+
- hours of expert podcasts
- videos read end to end
- 3,700+
- videos read end to end
- experts, one vote each
- 5
- experts, one vote each
- claims, each with a video and a minute
- 1,000+
- claims, each with a video and a minute
Free. No account. About 30 seconds.
Consensus Report
Magnesium
Nobody pays us to score well.
No brand pays us. There are no affiliate links and there is no storefront. The Pro subscription is the only money that comes in, which is why a supplement can score 2.3 here and nothing happens to us.
“It's hard to know which heads to listen to.”
That comment has 2,300 likes. Some version of it turns up 2,189 times in the 298,879 comments on these six channels, and it has been getting more common every quarter since 2022.
Same mineral, three answers
Patrick picks glycinate or malate. Huberman rates bisglycinate on par with threonate for sleep. Attia picks carbonate and says the others speed your bowel. Which do you take?
“Just tell me the 6 things”
A real viewer wrote that. One magnesium answer sits in 17 videos. Creatine took 50 videos and 85 hours. Positions also change, and nobody has time to catch the update.
No name, no minute
ChatGPT gives you an answer. It rarely gives you the name and the minute behind it. An answer with no source is a guess in a confident voice.
Not a study database. Your own list, checked against what they said on camera.
Research tools tell you what the studies say. Precis starts from what you already take. It tells you which supplements the experts back, which ones they fight over, and what they say to change about the dose, the form and the timing.
A summary tells you what one person said. This tells you how many of them said it.
Type your list or upload a photo. Each supplement comes back with its score and the minute behind it. Score my stack →
The score is the easy part. Here's the fight.
Agreement is easy to find. Precis shows you the fight, then scores it.
Attia picks carbonate. Patrick picks glycinate. Huberman splits them by job.
Threonate is what the shelf pushes. Patrick says it's a poor way to hit your daily need.
The score still lands at 4.1. The fight is form, not whether.
Consensus Report
Magnesium
Experts Recommend
Strong Consensus
Four of five experts recommend magnesium for sleep, cognition and bone health. The debate is about form, not whether to take it. Attia favors carbonate. Patrick recommends glycinate.
Expert Positions
The dose, free
No accountAttia says 300 to 500 mg a day. Bone Health episode, 87:02.
The form, the timing and what the other four say are in the report.
Nobody voted. We counted what they already said.
The method has three steps and none of them is a judgment call.
One vote each
We read every video an expert published on the topic. Creatine took 50 videos and 85 hours of tape.
The count is the score
Sleep scores 5.0 because all five agree. NMN and NAD+ score 2.3 because they don't.
You check our work
Every stance carries the video and the minute behind it. Go listen.
Creatine, start to finish
videos read, across 85 hours
all five recommend it, each on tape
the score that count produces
The score moves only when an expert says something new. Nothing here is our opinion.
The boring ones win. The expensive ones split the room.
Most people come here to add something. The more useful half of this page is the bottom row.
Where they agree
Sleep Protocol
Temp, light, and what to take
Omega-3
How much EPA, and which form
Creatine
5g, before or after?
Where they split
NMN / NAD+
Which one, and does it work?
Sulforaphane
Broccoli sprouts or a capsule?
Melatonin
Dose, and who should skip it
A low score means the five disagree. It does not mean the thing failed a study.
38 more topics, from Vitamin D and Zone 2 to fasting and HRT.
Browse All Reports“Is it safe for me?” is the question a page can't answer.
A report tells you what the five said. Chat answers the follow-up: what did any of them say about this next to my labs, my meds, my age. Every answer still carries the expert, the video and the minute.
You don't have to trust us. Check the tape.
My magnesium is normal but my vitamin D is low. Do I still need magnesium?
A normal result doesn't settle it. Around 99% of your magnesium sits inside cells, so a serum test reads a sliver of it. Your body also pulls from bone to hold that number steady. A real shortfall can hide behind a clean report. Magnesium is also what turns vitamin D into the form your body uses.
When do I take them?
Magnesium in the evening. Huberman suggests 300 to 400mg, 30 to 60 minutes before bed. Take vitamin D with a meal that has fat in it, since it is fat-soluble and you absorb little without fat. Morning or midday is the better slot.
Chat comes in the same Pro plan as the full reports. One subscription unlocks both.
Stop paying for supplements none of them back.
Free shows the score, every stance and every timecode. Pro adds the dose each expert names, timing, deep dives and Precis Chat, for $79 a year or $9 a month.
It costs $79 because we already did the reading. The same 2,800+ hours answer your question and everyone else's. Nobody bills you for a researcher's afternoon.
Precis Pro
We watch the experts so you don't have to
billed $79 a year, a 26% saving
Longevity isn't a 30-day trial. Biomarker shifts take months to show up on a blood panel. Annual covers a full testing cycle, spring through winter.
- Save & track your supplement stack with expert consensus scores
- Expert dosage alerts when an expert changes a number
- Exact dosages and timing from each expert
- Unlimited Precis Chat across 3,700+ episodes
- Full deep-dive reports with video citations and timestamps
Cancel anytime. Secure payment via Stripe.
The average health optimizer spends $214 a month on supplements. If Precis helps you drop the ones nobody on the panel backs, it pays for itself in the first month. Spend figures: Sanctuary Wellness Institute, 2025.
Questions
Straight answers.
Do you sell supplements?
+
No. No brand pays us. There are no affiliate links and there is no storefront. The Pro subscription is our only revenue. It covers the dose, form and timing for every topic. It adds the deep dives, unlimited chat and your own stack scored against all five. You are the customer, not the product. That is why we have no reason to prefer one magnesium form over another.
Why not just ask ChatGPT?
+
Plenty of people do, and it answers fast. The difference is what comes back with the answer. Every claim here names the expert who said it, the video and the minute. You can open the source and hear it yourself. Where an expert cites a study, we surface that too. We draw from one fixed set of videos we have read. If nobody said it on tape, we don't print it. That rule is the whole product. We never ask you to take our word for anything. Reports update monthly, or sooner when an expert changes position. Pro subscribers get an alert when a stance shifts on something in their stack.
How does the consensus scoring work?
+
We score each supplement 0 to 5 by counting how many of the five core experts recommend it. A 5.0 means all five strongly agree. Below 3.0 means they disagree. Scores come from the 3,700+ videos we track across the six channels, each with a timestamp. We record stance strength too. Strongly recommends. Recommends. Nuanced. Disagrees.
Which experts and scientists does Precis analyze?
+
Six channels: Dr. Andrew Huberman, Dr. Peter Attia, Dr. Rhonda Patrick, Dr. Mark Hyman, Bryan Johnson, and Diary of a CEO. Consensus scores come from the first five; Diary of a CEO is read for its guests, not scored as a sixth opinion. Across them we have read 630+ guests, 310+ of them introduced as a doctor, physician or professor, among them physicians and research scientists 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.
What supplements do longevity experts agree on?
+
Across the 3,700+ videos we track, the highest-scoring supplements are Omega-3 (4.8/5), Creatine (4.6/5) and Magnesium (4.1/5). The lowest are NMN/NAD+ (2.3/5), Metformin (2.5/5) and Sulforaphane (2.6/5). The cheap, boring supplements have the most agreement. The expensive, trendy ones are where experts fight. We track 50 supplements and publish 44 full reports.
Is this medical advice?
+
No. We report what these five say in public, on their own channels. Precis is an information tool, not a medical provider. Every claim links back to its source video and timestamp so you can check it yourself. Talk to your doctor before you change your health routine.
Arun Agrahri builds Precis. One person, no team, no medical license. Every dose on the site had to match a line in a real transcript before it shipped. How it works →
Also free, and none of it needs an account.
What the five said this week, and who disagreed.
One email a week. We check every new claim against the other four before it goes out.
Read this week's issue · No spam. Unsubscribe anytime.