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Life Extension Neuro-Mag Magnesium L-Threonate 90 Capsules — product packagingView image

Life Extension Neuro-Mag Magnesium L-Threonate 90 Capsules

Neuro-Mag · 90 vegetarian capsules

Elemental magnesium 144 mg from Magtein magnesium L-threonate 2,000 mg per label serving.

Amount
Elemental magnesium 144 mg from Magtein magnesium L-threonate 2,000 mg
Format
Capsules

Check medicines and kidney-health concerns before use. Review the safety context.

Good fit

people deliberately comparing Magtein L-threonate and who accept a premium three-capsule routine

Consider another option

you mainly need elemental magnesium, low cost, or strong proof for cognitive outcomes

The product, at a glance

Amounts for the reviewed label serving.

Reviewed variant
Neuro-Mag · 90 vegetarian capsules
Label serving
3 capsules
Servings per reviewed pack
30
Ingredients per label serving
Elemental magnesium 144 mg from Magtein magnesium L-threonate 2,000 mg
Other ingredients
vegetable cellulose (capsule), microcrystalline cellulose, stearic acid, vegetable stearate, silica
Supplement Explained Score15/25See the five reasons · reviewed 2026-10-07
Customer rating snapshot4.8/5 · 36,293 ratingsiHerb · 2026-10-07
Label sources & rating context

Manufacturer · Retailer label

~ means approximate; — means no published value in this record. Customer ratings are the named publisher’s snapshot and may include multiple sizes or earlier formulas. The Supplement Explained Score is our source-reviewed editorial assessment out of 25, separate from customer stars. Compare the five criteria and the same intended use; the total is not a clinical ranking. Prices are dated USD offer snapshots; cost uses the reviewed pack and label serving.

  • Label clarity: 5/5
  • Evidence transfer: 3/5
  • Safety fit: 3/5
  • Quality proof: 2/5
  • Value fit: 2/5
Fast verdict: This is a premium Magtein magnesium L-threonate product delivering 144 mg elemental magnesium from a three-capsule serving. The label is clear and the branded form is specific, but the high cost and product-specific cognitive claim gap make it a niche choice rather than a generally superior magnesium.
On this pageTable of Contents
  1. 1Supplement Explained Score
  2. 2Who Life Extension Neuro-Mag Magnesium L-Threonate 90 Capsules may fit
  3. 3Who should skip Life Extension Neuro-Mag Magnesium L-Threonate 90 Capsules
  4. 4Life Extension Neuro-Mag Magnesium L-Threonate 90 Capsules label facts snapshot
  5. 5What is in the formula?
  6. 6Strengths, tradeoffs, and red flags
  7. 7Price and value analysis
  8. 8Is there third-party testing or quality proof?
  9. 9Use-case fit, evidence limits, and safety
  10. 10Alternatives to compare
  11. 11FAQ
  12. 12References and product sources

Our editorial assessment

Supplement Explained Score

15/25

Life Extension Neuro-Mag Magnesium L-Threonate 90 Capsules · Neuro-Mag · 90 vegetarian capsules

Five equally weighted criteria, with a product-specific reason for every point. This is a buying-decision assessment, separate from customer stars and personal medical suitability.

Label clarity 5/5
Reviewed Neuro-Mag · 90 vegetarian capsules: 3 capsules; 30 label servings. Elemental magnesium 144 mg from Magtein magnesium L-threonate 2,000 mg.
Evidence transfer 3/5
L-threonate cognition research is limited; 2 g Magtein contains 144 mg elemental magnesium and is not proven universal cognitive treatment.
Safety fit 3/5
Review other magnesium, renal function and interacting medicines; three capsules add routine burden.
Quality proof 2/5
Magtein identifies an ingredient, while LE Certified is a manufacturer program, not an independent finished-lot report.
Value fit 2/5
The $1.05 per label serving snapshot is materially above simpler magnesium options without a verified cognitive outcome advantage.

Review basis: Published labels, manufacturer/retailer information, clinical sources and exact-product quality records where available. We did not buy, personally use or laboratory-test this product for this assessment.

Reviewed · Method v2.0 · How we assign points

Sources behind this score

Product labels and independent directory records identify a formula or testing scope. Clinical references concern ingredients or studied regimens unless the explanation explicitly matches the finished formula.

Who Life Extension Neuro-Mag Magnesium L-Threonate 90 Capsules may fit

  • People specifically seeking magnesium L-threonate rather than a general magnesium supplement.
  • Shoppers willing to pay for a branded raw material.
  • People comfortable with three capsules for 144 mg elemental magnesium.
  • Readers who understand that promising form-level research is not proof for this exact bottle.

Compare the form against magnesium glycinate vs threonate before paying a cognitive-positioning premium.

Who should skip Life Extension Neuro-Mag Magnesium L-Threonate 90 Capsules

  • People shopping mainly for the lowest price per 100 mg elemental magnesium.
  • Anyone who wants a one-capsule routine.
  • Shoppers treating brain-health branding as a guaranteed cognitive effect.
  • People with kidney disease or medicine-spacing questions.

Use the magnesium form selector if the real question is sleep, constipation, deficiency, or general magnesium intake rather than L-threonate specifically.

Proof status for this review

This is a label-based editorial review. We checked the public label, serving size, active amount, current retailer or brand information, named quality signals, ingredient evidence, and recurring public review themes. It is not a hands-on test, lab certificate, or medical recommendation.

The page records Magtein and public label details but does not claim hands-on testing or that studies on magnesium L-threonate prove a benefit for this finished product.

What is in the formula?

The serving contains 2,000 mg Magtein magnesium L-threonate, yielding 144 mg elemental magnesium. The distinction between compound weight and elemental amount is essential.

The product is positioned around brain and memory support. That makes evidence transfer the decisive issue: form-level studies do not automatically establish outcomes for this exact product, person, dose, or duration.

The serving is three capsules, which makes the bottle a 30-day supply and raises cost well above mainstream glycinate products.

Per capsule

Elemental amount

48 mg

Low compared with many glycinate capsules.

Per full serving

Elemental total

144 mg

The useful intake number, not the 2,000 mg complex weight.

Form

Product distinction

Magtein L-threonate

A specific branded form rather than generic magnesium.

Decision

Main friction

Premium cost

The cognitive positioning must justify the price for the buyer.

Strengths, tradeoffs, and red flags

What looks strong

  • Clear form identity: Magtein is named and the elemental yield is visible.
  • Transparent serving: the three-capsule dose and 30-day supply are easy to calculate.
  • Niche purpose: the product has a distinct reason to exist for L-threonate shoppers.
  • Lower elemental dose: may suit people who are not seeking a large magnesium amount, although appropriateness remains individual.

What may change the decision

  • High cost: the price per 100 mg elemental magnesium is very high.
  • Three-capsule serving: premium pricing does not reduce pill burden.
  • Evidence gap: brain-health branding can outrun product-specific clinical proof.

Red flags before you buy

  • Do not compare 2,000 mg Magtein with 2,000 mg elemental magnesium.
  • Do not treat L-threonate as universally better for sleep or general magnesium replacement.
  • Cognitive symptoms warrant evaluation rather than repeated supplement escalation.
  • Kidney and medicine-spacing safety still applies.

Price and value analysis

HerbsPro listed the 90-capsule bottle at $31.50 on October 2, 2026. With 30 label servings, that is about $1.05 per serving and $0.73 per 100 mg elemental magnesium. You are paying for the L-threonate format, not a larger magnesium amount. Price excludes coupons, tax, and shipping and may change.

Per day

Serving cost

About $1.05

A 30-day bottle at label use.

Per 100 mg

Elemental magnesium cost

About $0.73

Not a value-first magnesium route.

What you pay for

Premium feature

Magtein form

The decision depends on form-specific goals, not magnesium quantity.

Use the price per effective dose calculator when package size, serving burden, or active amount makes two products look more similar than they are.

Is there third-party testing or quality proof?

The named Magtein raw material improves traceability and label specificity. We did not review a public finished-product batch COA or named independent certification.

A branded ingredient is not the same as proof that every bottle meets an outcome claim. Quality and clinical effectiveness remain separate questions.

Use-case fit, evidence limits, and safety

Magnesium L-threonate has emerging human research, but study populations, outcomes, and products vary. The evidence is not strong enough to call this finished product a proven cognitive treatment.

NIH magnesium guidance remains relevant for total intake, GI effects, kidneys, and medicine interactions regardless of the premium form.

Safety boundary

  • Magnesium can cause GI effects and interact with some medicines.
  • Kidney impairment requires professional guidance.
  • New or progressive cognitive symptoms need medical evaluation.
  • Account for magnesium from other supplements even though this serving has a lower elemental amount.

If medicines, pregnancy, surgery, kidney or liver disease, abnormal labs, or multiple supplements are part of the picture, use the supplement interaction checklist and involve a qualified clinician or pharmacist.

Alternatives to compare

Compare form-specific goals against lower-cost glycinate products and the actual elemental amount.

FAQ

How much elemental magnesium is in Neuro-Mag?

Three capsules provide 144 mg elemental magnesium, or 48 mg per capsule.

Why does the label say 2,000 mg?

That is the weight of the Magtein magnesium L-threonate complex, not elemental magnesium.

Is Neuro-Mag proven to improve memory?

The reviewed evidence does not prove that this exact finished product improves memory for every user.

How long does the bottle last?

The 90-capsule bottle provides 30 full three-capsule servings.

References and product sources

  1. iHerb product listing – label, serving, price, and public reviews
  2. Life Extension official product page – current form and label context
  3. NIH ODS Magnesium Health Professional Fact Sheet – intake, safety, and interaction context
  4. Public Reddit L-threonate discussions – anecdotal value and outcome themes

Update note: Label, price, availability, and quality claims were checked on July 28, 2026. Retailer listings and formulas can change; use the live label before purchase.

Editorial information

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