BySupplement Explained Updated on

MAGNESIUM PRODUCT ANALYSIS

Life Extension Neuro-Mag Magnesium L-Threonate 90 Capsules

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.
Good fit when its specific features solve a real needUpdated 2026-07-28
Best forpeople deliberately comparing Magtein L-threonate and who accept a premium three-capsule routine
Skip ifyou mainly need elemental magnesium, low cost, or strong proof for cognitive outcomes
Current public price$40.50Price and stock can change
Check price at iHerb

Affiliate link. We may earn a commission; the retailer does not control this analysis or score.

Quick decision

If you compare only one thing

Compare what the premium or tradeoff actually buys: the useful dose, format, quality proof, and total cost. If those features do not solve a real need, compare alternatives before leaving for a retailer.

Supplement Explained Score21/25Label-based editorial review
How this is scored
  • Label clarity5/5
  • Evidence transfer5/5
  • Safety fit5/5
  • Quality proof2/5
  • Value fit4/5

Read the scoring method

Evidence boundaryIngredient-level evidence discussed

The page discusses evidence context while avoiding the shortcut that ingredient research proves this specific bottle.

This is a label-based editorial review of Life Extension Neuro-Mag Magnesium L-Threonate 90 Capsules, not a hands-on lab test or medical recommendation.
On this pageTable of Contents
  1. 1Who Life Extension Neuro-Mag Magnesium L-Threonate 90 Capsules may fit
  2. 2Who should skip Life Extension Neuro-Mag Magnesium L-Threonate 90 Capsules
  3. 3Life Extension Neuro-Mag Magnesium L-Threonate 90 Capsules label facts snapshot
  4. 4What is in the formula?
  5. 5Strengths, tradeoffs, and red flags
  6. 6Price and value analysis
  7. 7Is there third-party testing or quality proof?
  8. 8Use-case fit, evidence limits, and safety
  9. 9Alternatives to compare
  10. 10FAQ
  11. 11References and product sources

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.

Life Extension Neuro-Mag Magnesium L-Threonate 90 Capsules label facts snapshot

Three capsules provide 2,000 mg of Magtein magnesium L-threonate and 144 mg elemental magnesium. Each capsule therefore contributes 48 mg elemental magnesium.

Branded complex

Per serving

2,000 mg Magtein

Do not confuse complex weight with elemental magnesium.

Elemental magnesium

Per serving

144 mg

The number to use in total magnesium calculations.

Routine

Full serving

3 capsules

A meaningful premium and pill-burden tradeoff.

Supply

Bottle duration

30 days

Ninety capsules at three daily.

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

At an observed price near $40.50 for 30 servings, the daily cost is about $1.35 and the cost per 100 mg elemental magnesium is about $0.94. That is a substantial premium over glycinate products.

Per day

Serving cost

About $1.35

A 30-day bottle at label use.

Per 100 mg

Elemental magnesium cost

About $0.94

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.

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