Thorne Magnesium CitraMate Review

What Thorne Magnesium CitraMate actually is

This is a small, plain magnesium capsule sold through the practitioner channel, and its defining feature is restraint.

The product page, checked October 11, 2026, lists 135 mg of elemental magnesium per capsule. The panel splits it: 80 mg from dimagnesium malate and 55 mg from magnesium citrate.

Printing the two salts separately is better labelling than most brands manage. It tells you exactly what you are getting from each compound rather than hiding both behind a blend name.

The bottle holds 90 capsules and the serving size is one capsule, so 90 servings. Directions are one capsule one to three times daily, or as recommended by your health-care practitioner.

Other ingredients are a hypromellose capsule and medium chain triglyceride oil. That is the whole list.

No absorption claim appears anywhere on the page. No sleep claim either. After reading a lot of magnesium marketing, that absence is worth noticing.

This grade comes from the vendor's page, the FDA Daily Value table, MedlinePlus reference intakes and the published literature. Nobody here swallowed these capsules, and we will not pretend otherwise.

Who it is best for, and who should skip it

The buyer for this product is someone who wants a dial rather than a switch.

A single 135 mg capsule means the label's three options are 135 mg, 270 mg or 405 mg a day. Two-tablet servings do not offer that granularity.

It suits:

• People topping up a modest dietary gap who do not need 200 mg or more in one go.
• Anyone who reacted badly to a large citrate dose but still wants an organic salt; 55 mg of citrate per capsule is a gentle amount.
• Buyers who distrust marketing claims - this page makes none, which is unusual in the category.
• People who already get magnesium elsewhere, from a multivitamin such as Ritual Essential for Women or an electrolyte mix such as LMNT, and want a small addition rather than a second full dose.
• Should skip it: anyone who needs a certified potency seal, anyone with kidney disease or on dialysis, anyone on tetracycline or quinolone antibiotics or oral bisphosphonates who has not sorted timing with a pharmacist, and anyone who wants the lowest possible price per milligram.

The dose, and what the reference numbers say

One capsule is 135 mg of elemental magnesium. Against the FDA Daily Value of 420 mg for adults and children four and older, that is about 32 percent. The percentage is our calculation, because the page does not print one.

That omission is a small mark against the label. A percentage Daily Value is the fastest way for a buyer to judge a dose, and leaving it off pushes the arithmetic onto the reader.

MedlinePlus, reviewed January 21, 2025, lists adult RDAs of 400 mg for men 19 to 30, 420 mg for men 31 and older, 310 mg for women 19 to 30 and 320 mg for women 31 and older. Food is expected to supply most of that.

The ceiling matters more than the floor here. The US Tolerable Upper Intake Level for supplemental magnesium is 350 mg a day for adults, as confirmed in the Nordic Nutrition Recommendations scoping review by Henriksen and Aaseth in 2023. The same review records a 250 mg EU maximum.

So the label's upper option, three capsules at 405 mg, sits above the US limit and well above the EU figure.

One or two capsules a day stays inside both. That is the conservative default, and anything higher is a conversation with a clinician rather than a decision to make from a product page.

What it costs, and how that compares

At $22.00 for 90 capsules, checked October 11, 2026, each capsule is about $0.24. No subscription price was shown on the page.

Because the capsule holds 135 mg, the per-milligram figure is the useful one: roughly $0.18 per 100 mg of elemental magnesium. That arithmetic is ours, from the vendor's own numbers.

A one-capsule day costs about $0.24 and a two-capsule day about $0.49. A 90-capsule bottle therefore lasts one to three months depending on how you dose it.

For context on the same arithmetic basis, Doctor's Best High Absorption Magnesium lists at $23.99 for 120 servings of 200 mg, about $0.10 per 100 mg, and Natural Vitality Calm unflavoured lists at $35.79 for 113 servings of 350 mg, about $0.09 per 100 mg.

So CitraMate is not the cheapest magnesium per milligram. It is about twice the price of the glycinate tablet and the citrate powder.

What the premium buys is format: a single small capsule instead of two tablets or a measured teaspoon of fizzing powder. Whether that is worth doubling the per-milligram cost depends on how much the format annoys you, which only you can answer.

Malate plus citrate: what can and cannot be said about absorption

The most defensible statement about magnesium forms is also the least exciting one.

The Nordic Nutrition Recommendations scoping review states that inorganic forms appear to be less bioavailable than organic ones. Malate and citrate are both organic salts, so that general finding sits in this product's favour against magnesium oxide.

What cannot be said is that this particular blend beats a single salt. We found no trial comparing a malate and citrate combination against either compound alone, and the vendor does not cite one.

That is why the page's silence reads as a point in its favour rather than a gap. Compare it with the Doctor's Best page, which claims the product is up to six times better absorbed than other forms of magnesium without an independent study on the page to support it.

The practical difference between forms is usually the gut, not the bloodstream. Citrate pulls water into the intestine at higher doses, which is why it appears in laxative products.

The Nordic review notes that intakes of roughly 0.5 to 5 g a day cause diarrhoea while producing no other symptoms when kidney function is normal.

At 55 mg of citrate per capsule, that effect is far less likely than with a 350 mg citrate powder serving. For anyone who abandoned Natural Vitality Calm over loose stools, the small split dose here is the sensible retry.

Our guide to supplements with the best evidence sets out the wider point: magnesium earns its place as a mineral with a genuine intake shortfall, not as a treatment.

Third-party testing: what is here, and what is not

The marks on this page are gluten free, dairy free and soy free, plus statements about natural flavours and colours.

None of those verify that the capsule contains 135 mg of magnesium.

As of October 11, 2026, the product page lists no NSF Certified for Sport, USP Verified or Informed Sport seal. That is the same gap the other mainstream magnesium products we grade have, so it is a category problem rather than a brand failing.

It is still a gap. Our explainer on third-party supplement seals sets out which marks test finished product potency and which only audit paperwork or ingredients, and it is the piece to read before paying extra for any logo.

The reasonable way to read this bottle is therefore: well-specified label, clean excipients, no verification you can check yourself. Dietary supplements in the United States are not pre-approved for potency, so an unverified label is an act of trust in the brand.

That trust is easier to extend to a company selling through clinicians with a short, fully declared ingredient list than to a bottle with a proprietary blend. It is not the same as a seal.

Returns, service, and what buyers report publicly

Two things are missing from the page that a careful buyer would want: a return window and a satisfaction guarantee. Neither appears on the product page, although a returns link sits in the site footer.

Public feedback about the brand is poor and needs careful reading. Trustpilot showed a score of 1.7 out of 5 from 91 reviews on October 11, 2026, with 74 percent at one star, 54 reviews in the previous twelve months, and the profile marked unclaimed.

Two caveats matter. Ninety-one reviews is a small sample for a company this size, and unclaimed Trustpilot pages attract complaints far more than praise because satisfied buyers rarely seek them out.

The content of the complaints is also specific. They concentrate on customer service response times, missing or delayed shipments, difficulty cancelling subscriptions and slow refunds. Product quality is rarely the subject, and several reviewers praise the supplements while criticising the service.

Read that as a warning about ordering direct rather than evidence about what is in the capsule. The honest summary is that the label looks good, the published policies are thin, and the public service record is bad.

Alternatives

Doctor's Best High Absorption Magnesium. Two tablets give 200 mg as a lysinate glycinate chelate for about $0.10 per 100 mg at list price, roughly half the cost here. Choose it for the lowest price per milligram and a gentler reputation.

Choose CitraMate if you want 135 mg steps instead of 200 mg ones. Our full Doctor's Best review has the detail, and note its 240-tablet page showed as sold out on October 11, 2026.

Natural Vitality Calm. A citrate powder at 350 mg per 2-teaspoon serving, cheapest per milligram of the products we grade, and adjustable from 1 g of powder upward. Choose it if you dislike capsules. See the Natural Vitality Calm review.

A certified option. If a verified seal is the deciding factor, the magnesium capsules carrying NSF Certified for Sport cost several times more per milligram. Read our Momentous Magnesium L-Threonate review for what that premium looks like in practice.

Food, then everything else. Pumpkin seeds, almonds, spinach, black beans and whole grains cover much of the RDA for most people. Our budget stack guide applies that test before any bottle, and the same discipline applies to a daily probiotic or an omega-3.

Bottom line

Thorne Magnesium CitraMate is an unglamorous capsule that gets the label right and the paperwork half right.

The strengths are real: 135 mg of elemental magnesium per capsule from two organic salts, the milligrams from each printed separately, two excipients, flexible dosing and no marketing claim to argue with.

The weaknesses are also real: no potency seal, no percentage Daily Value on the panel, no return policy on the page, a poor public service record, and an upper dosing option that exceeds the 350 mg supplemental ceiling.

Buy it for dose control. Take one capsule with food, keep the daily supplemental total at or below 350 mg unless a clinician says otherwise, and count what your other supplements already contribute.

Grades here reflect labels, pricing pages and published research, never affiliate payouts. Informational only, not medical advice; talk to a clinician if you take medication or have kidney problems.

Best for

People who want a small, flexible magnesium dose they can take once, twice or three times a day, in two organic salts, without paying for a branded compound or a marketing claim.