Evidence report · Sleep

Magnesium benefits, dosage and which form

Verdict on whether magnesium supplements are worth taking: Strong consensus for. Magnesium at 300-500mg of elemental magnesium a day is worth taking if your diet falls short, and roughly half of US adults' diets do. The form depends on the goal: glycinate or malate for daily needs, carbonate to avoid loose stools, threonate for the brain only. A standard blood test is a poor guide to your status.

Best for:
adults whose diet falls short. Pick the form by your goal.
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14 sources credited54 counted mentions17 episodes · 28 h54 checked quotesChecked against the tape 2026-03-09

Benefits: does it work?

Each claim gets one verdict, worked out from every counted mention. One dot is one source: a researcher or a study. Tap a dot to see its receipt.

positive partly neutral negative Each researcher and each study counts once per claim, however often they come up.

  1. Strong consensus for

    Magnesium supplements are worth taking.

    8 sources: 6 positive, 2 partly.

    Researchers say

    6 positive, 2 partly

    Studies show

    No study counted yet.

    110 more not counted · see why
    We could not tell what position it takes on this claim. 27
    We could not confirm who is speaking. 26
    A host's remark inside an interview. 17
    We could not tell where the evidence comes from. 16
    The study cited could not be identified. 14
    Part of a sponsor's ad. 7
    No quote from the tape on record yet. 2
    No reader has judged its stance yet. 1
    Show the receipts from 8 sources
    1. Mark Hyman Video · positive · 15 mentions

      on The Dr. Hyman Show, at 16:27 · positive · Opinion

      “magnesium is my number one sleep supplement”

      on The Dr. Hyman Show, at 19:28 · positive · Opinion

      “It's one of the most consistently helpful nutrients for sleep. And you can use forms like magnesium glycinate or thrienate.”

      on The Dr. Hyman Show, at 06:00 · positive · Opinion

      “take magnesium supplements now this is very important I think most of us do need these”

      on The Dr. Hyman Show, at 07:17 · positive · Opinion

      “we need to be taking probably 300 400 milligrams a day I take about 4 or 600 I take it at night”

      on The Dr. Hyman Show, at 29:24 · positive · Opinion

      “so magnesium is my first go-to a lot of people are low in magnesium that can cause insomnia”

      on The Dr. Hyman Show, at 10:14 · positive · Opinion

      “there's some supplements that can really be helpful um I I like magnesium”

      on The Dr. Hyman Show, at 05:18 · positive · Opinion

      “I want you to supplement wisely a highquality multivitamin magnesium vitamin D3 omega-3 fats or fish oil”

      on The Dr. Hyman Show, at 27:47 · positive · Opinion

      “magnesium glycinate or magnesium 38 which is some the form that crosses the bloodb brain barrier helps reduce anxiety”

      on The Dr. Hyman Show, at 11:40 · positive · Opinion

      “magnesium is one of my favorites to take magnesium before bed two to 400 milligrams”

      on The Dr. Hyman Show, at 07:24 · positive · Opinion

      “we need to be taking probably 300 400 milligrams a day i take about four or six hundred”

      on The Dr. Hyman Show, at 06:50 · positive · Opinion

      “try some relaxing minerals like magnesium and calcium.”

      on The Dr. Hyman Show, at 21:25 · positive · Opinion

      “of all the supplements all the things that I use one of the most important is magnesium”

      on The Dr. Hyman Show, at 03:12 · partly · Opinion

      “number two try magnesium take 300 to 600 milligrams of magnesium twice a day in the form of magnesium glycinate or citrate”

      on The Dr. Hyman Show, at 06:13 · partly · Opinion

      “magnesium is a very powerful relaxation mineral for the digestive system it helps prevent the reflux”

      on The Dr. Hyman Show, at 10:51 · partly · Opinion

      “if you need a little extra help getting asleep you could try magnesium at night”

    2. Dr. Uma Naidoo, on The Dr. Hyman Show, at 59:10 Video · positive · Opinion

      “you can certain certainly supplement uh for this”

    3. Dr Michael Breus Video · positive · 3 mentions

      on Rangan Chatterjee's channel, at 1:28:48 · positive · Opinion

      “So, I start most people on magnesium glycinate um with about 150 to 200 milligrams.”

      on The Diary Of A CEO, at 1:40:42 · positive · Opinion

      “So, a lot of people require magnesium supplementation.”

      on The Diary Of A CEO, at 1:36:47 · partly · Opinion

      “If you're deficient in vitamin D, magnesium, iron, fix those three things first.”

    4. Rhonda Patrick Video · positive · 5 mentions

      on The Dr. Hyman Show, at 1:15:58 · positive · Opinion

      “you want to make sure you're getting an organic salt so that would be something like magnesium citrate magnesium malate magnesium um glycinate”

      on FoundMyFitness, at 22:46 · positive · Opinion

      “the answer is I hedge my bets I take a supplement that has many different forms of magnesium salts”

      on FoundMyFitness, at 23:06 · positive · Opinion

      “ideally increasing leafy greens and also taking a supplement magnesium glycinate citrate malate are”

      on The Dr. Hyman Show, at 1:19:02 · partly · Opinion

      “you about three 250 300 milligrams you know is a good is a good range”

      on Huberman Lab, at 20:56 · partly · Opinion

      “supplementation with magnesium, it can cause GI distress at like high doses. I personally like to take around 130 or 135 milligrams”

    5. Dr. Matt Walker, on Huberman Lab, at 2:20:10 Video · positive · Opinion

      “the supplements that I recommend when people ask and for supplement recommendations specifically are magnesium 3 and”

    6. Dr. Gabrielle Lyon, on Huberman Lab, at 2:30:09 Video · positive · Opinion

      “but yes magnesium supplementation can be very beneficial uh for muscle for brain”

    7. Guy Leschziner, on The Diary Of A CEO, at 1:16:37 Video · partly · Opinion

      “magnesium so so anecdotally magnesium can help some individuals”

    8. Andrew Huberman Video · partly · 6 mentions

      on Huberman Lab, at 27:31 · partly · Opinion

      “taking 300 to 400 milligrams of magnesium diglycinate or magnesium 3enate 30 to 60 minutes before sleep can aid them in falling asleep.”

      on Huberman Lab, at 1:51:53 · partly · Opinion

      “So for many people, taking 300 to 400 milligrams of magnesium bisglycinate or magnesium threonate, and there I'm referring to the elemental magnesium for you aficionados,”

      on Huberman Lab, at 1:13:55 · partly · Opinion

      “For many people, however, taking 145 milligrams of magnesium threonate can be very beneficial.”

      on Huberman Lab, at 1:15:04 · partly · Opinion

      “About 5% of people report that magnesium threonate really disrupts their gut. It gives them diarrhea or gastric distress. In which case, don't take it.”

      on Huberman Lab, at 1:01:44 · partly · Opinion

      “But magnesium threonate, most people I recommend it to have benefit from it tremendously.”

      on Huberman Lab, at 18:15 · partly · Opinion

      “The supplements that I've suggested and that I personally take in order to improve my sleep are magnesium threonate”

  2. Leaning for

    Magnesium supplements improve sleep and overall health.

    8 sources: 7 partly, 1 negative.

    Researchers say

    4 partly

    Studies show

    3 partly, 1 negative

    4 papers we read

    59 more not counted · see why
    We could not confirm who is speaking. 14
    We could not tell what position it takes on this claim. 12
    We could not tell where the evidence comes from. 8
    A host's remark inside an interview. 8
    Part of a sponsor's ad. 7
    The study cited could not be identified. 6
    The study is not yet read in full. 4
    Show the receipts from 8 sources
    1. Dr. Mark Hyman Video · partly · 6 mentions

      on Huberman Lab, at 51:45 · positive · Opinion

      “It's also helps with detoxification and sleep and other things.”

      on The Dr. Hyman Show, at 21:35 · positive · Opinion

      “most people have such improvements pretty quickly when they take it uh and it can improve your sleep”

      on The Dr. Hyman Show, at 19:02 · partly · Opinion

      “Okay. Now, here's here's uh the most helpful ones. Magnesium.”

      on The Dr. Hyman Show, at 29:20 · partly · Opinion

      “there are a lot of things you can do to help improve sleep through supplementation so magnesium is my first go-to”

      on The Dr. Hyman Show, at 10:48 · partly · Opinion

      “magnesium is absorbed through the skin which helps you relax”

      on The Dr. Hyman Show, at 10:53 · partly · Opinion

      “need a little extra help getting asleep you could try magnesium at night”

    2. Dr Michael Breus, on Rangan Chatterjee's channel, at 1:28:41 Video · partly · Opinion

      “You get your magnesium which can help with your deficiency”

    3. Guy Leschziner, on The Diary Of A CEO, at 1:16:37 Video · partly · Opinion

      “anecdotally magnesium can help some individuals”

    4. Andrew Huberman Video · partly · 4 mentions

      on Huberman Lab, at 1:51:53 · partly · Opinion

      “So for many people, taking 300 to 400 milligrams of magnesium bisglycinate or magnesium threonate, and there I'm referring to the elemental magnesium for you aficionados,”

      on Huberman Lab, at 1:12:28 · partly · Opinion

      “There are supplements that for most people will greatly improve their ability to fall and stay asleep”

      on Huberman Lab, at 1:01:44 · partly · Opinion

      “But magnesium threonate, most people I recommend it to have benefit from it tremendously.”

      on Huberman Lab, at 18:15 · partly · Opinion

      “The supplements that I've suggested and that I personally take in order to improve my sleep are magnesium threonate,”

    5. Pooled analysis, BMC Complement Med Ther, 2021, PMID 33865376 Study · partly

      The findings suggest that the true effect of magnesium supplementation on insomnia symptoms lies somewhere between a positive effect and a null effect in comparison to placebo as measured by sleep parameters and questionnaires.

    6. Systematic review, Nutrients, 2024, PMID 39064758 Study · partly

      One study shows that magnesium and vitamin B6 supplementations alleviate RLS symptoms, with magnesium being superior in terms of efficacy, albeit with limited evidence.

    7. Controlled trial, Front Endocrinol (Lausanne), 2024, PMID 39534260 Study · partly

      In addition, supplementation significantly decreased the severity of insomnia among patients with diabetes by improving sleep duration.

    8. Controlled trial, Nutrients, 2024, PMID 38257144 Study · negative

      Supplementation of ZMA for two nights of partial sleep deprivation had no effect on sleep or subsequent morning performance.

4 more claims on dose, form and timing, each with its verdict and receipts, are in the full report.

How much, which type, and when?

Free with an account ↓
Dosage
Form
Timing
Evidence
Verdict
Strong consensus for · 8 sources: 6 positive, 2 partly

Is it safe for me?

6 risks to check before you start

  1. High doses (>600mg elemental) can cause diarrhea, cramping and nausea. Start low and build up.
  2. Citrate, glycinate and oxide can speed up the bowel; carbonate avoids this (Peter Attia).
  3. May interact with some antibiotics (tetracyclines, fluoroquinolones) and with bisphosphonates. Take them 2+ hours apart.
  4. People with kidney disease should ask their doctor first, because weak kidneys can't clear extra magnesium well.
  5. Too much supplemental zinc can block magnesium absorption (Rhonda Patrick).
  6. Blood tests for magnesium are unreliable: the body keeps plasma levels steady by drawing on bone, which hides a deficiency (Peter Attia; Andy Galpin, on FoundMyFitness).

Why do the sources disagree?

Built from every credited researcher and cited study on each claim.

Strong consensus for

Magnesium supplements are worth taking.

Supports it 6 sources
Partly 2 sources
Leaning for

Magnesium supplements improve sleep and overall health.

Partly 7 sources

Researchers

Studies

Against it 1 source

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About This Analysis

This report on Magnesium draws on 17 videos (28 hours analyzed) out of 3,700+ hours of recorded interviews with 380+ researchers and doctors, plus 87,700+ research studies. Every mention of a claim gets a stance, and the verdict is worked out from all of them, never written by hand.

The full report adds 8 key findings and the dose and protocol. It also has the verdict on every claim, a receipt for each mention, the risks to check, and what combines with it.

Frequently Asked Questions

What's the best form of magnesium to take?
It depends on your goal. Glycinate or malate suit everyday absorption (Rhonda Patrick). Carbonate gives the fullest absorption without speeding up the bowel (Peter Attia). Threonate is for the brain only and a poor source for daily needs (Rhonda Patrick). Citrate and oxide loosen the bowel.
How much magnesium should you take per day?
300-500mg of elemental magnesium daily, treated as a minimum (Peter Attia). Others target roughly 400mg (Rhonda Patrick) or 400mg or more (Mark Hyman). Physically active adults need 10-20% more because of sweat losses (Rhonda Patrick).
Does magnesium help with sleep?
It may, mostly as an evening dose. Magnesium glycinate is stacked with theanine and apigenin for sleep (Andrew Huberman), and magnesium is used for sleep after quitting alcohol (discussed on The Doctor's Farmacy). The clearest sleep benefit shows up in older adults (Matt Walker, on Huberman Lab).
Can you take magnesium with vitamin D?
Yes, and they work better together. Magnesium is needed to turn vitamin D into its active form, so vitamin D may work less well without it (Rhonda Patrick). Calcium, vitamin D3 and magnesium are 'the big three' for bone health (Peter Attia).
Where does the evidence on magnesium disagree?
Mostly on form. Carbonate absorbs best in one view (Peter Attia); glycinate and malate in another (Rhonda Patrick). Threonate's brain trials were industry funded (Rhonda Patrick). Food-first versus supplement-first is the other split (Mark Hyman; Rhonda Patrick).

Common Questions

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Get dosages, timing and the verdict on every claim with its receipts for Magnesium.