Verdict: Thorne Magnesium Bisglycinate for everyday use due to better value and broader absorption (per Healthline and WebMD supplement reviews). Jarrow Magmind is preferable when cognitive support is the primary goal given its L-threonate form. Direct head-to-head trials are limited, with most data coming from form-specific studies rather than brand comparisons.
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Winner: Thorne Magnesium Bisglycinate
Jarrow Formulas Magmind: 7/10
Thorne Magnesium Bisglycinate: 7.5/10
Spec-by-spec comparison
Jarrow Formulas Magmind
Thorne Magnesium Bisglycinate
form
Magnesium L-Threonate
Magnesium Bisglycinate
elemental_magnesium
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Jarrow Formulas Magmind
What works
Designed for cognitive support via L-threonate form
May cross blood-brain barrier more effectively
Generally well-tolerated with fewer GI effects
What doesn't
Higher cost per serving than standard forms
Lower elemental magnesium content typical of this form