Sports Research vs NOW Magtein vs Life Extension Neuro-Mag
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Updated October 20, 2026
Shopping for magnesium L-threonate? Sports Research, NOW Foods and Life Extension offer options at BPBalance. Their brand names and bottle sizes differ, so compare the complete label and price per serving.
Quick comparison
| Product | Listed format | Bottle sizes at BPBalance |
|---|---|---|
| Sports Research Magnesium L-Threonate with Magtein | Veggie capsules | 90 or 180 |
| NOW Foods Magtein | Vegetarian capsules | 90 or 180 |
| Life Extension Neuro-Mag | Vegetarian capsules | 90 |
What do they have in common?
All three listings identify magnesium L-threonate. Magtein® is the branded ingredient named in the Sports Research and NOW listings. A shared magnesium form does not mean the complete formulas, capsule ingredients or directions are identical.
Compare servings before bottle price
The Sports Research listing indicates three capsules daily, corresponding to approximately 30 servings in the 90-count bottle and 60 in the 180-count bottle. Confirm the current label for each brand; do not transfer one brand’s directions to another.
Which brand is best value?
Use the current selected-variant price divided by labeled servings per bottle. A sale or change in serving size can change the comparison. This guide does not name a permanent price winner.
Does a larger bottle mean a stronger serving?
No. Bottle count describes the number of capsules, while strength is shown per serving. Read both fields separately.
What about memory or sleep claims?
This comparison covers format and shopping details. It does not establish a clinical advantage for one brand or guarantee an effect on memory or sleep.
More help choosing
Read our 90 vs 180 capsule guide and Magtein vs magnesium glycinate comparison.
Safety and sources
Magnesium supplements can cause diarrhea, nausea or cramps and can interfere with some medicines. Ask a healthcare professional before use if you have a medical condition, are pregnant or nursing, or take medication.
Product format and count information: linked BPBalance listings, checked October 20, 2026. General safety: NIH Office of Dietary Supplements: Magnesium. Always confirm the label on the package you receive.
For education only; not medical advice. Dietary supplements are not intended to diagnose, treat, cure or prevent disease.