Medical disclaimer: SnoozeVerdict summarizes what people say about sleep supplements on Reddit. It is not medical advice, and nothing here is meant to diagnose, treat, cure, or prevent any disease. These statements have not been evaluated by the Food and Drug Administration. Talk to your doctor or pharmacist before starting a supplement, especially if you are pregnant, take medicines (including sleep or mood medicines), or have a medical condition. Poor sleep that lasts for months, loud snoring or gasping at night, or falling asleep during the day while driving or working needs a doctor, not a supplement. Full disclaimer.
Brand · Magnesium L-threonate (Magtein)

Magtein (ingredient brand): Reddit Owner Reviews

2.7 Magtein (ingredient brand) score (9 owner comments, 5 rated)
Owner sentiment2.7
Recommendations1.0
Tolerability3.6
ValueNot rated

Ingredient overall: Magnesium L-threonate (Magtein) 3.4 from 104 owner comments.

Read how magnesium forms compare for sleep. There is a separate ranking of what people rate highest for anxiety at night. Compare the top-rated options for sleep quality by sleep problem.

Commonly praised

    Common complaints

    • Side effects: 2
    • Morning grogginess: 1
    • Taste & form: 1

    What owners say about Magtein (ingredient brand)

    4/5

    “Same here, so I tried Magnesium L-Threonate (Magtein) which works much better for me.”

    owner comment via r/Supplements · 2026-08-06 · 8 upvotes
    2/5 Emotional bluntingMood

    “I take 2400 mg fish oil for depression and panic attacks (been taking for 15 years), magtein before bed for anhedonia and sleep (been taking for 6 years), koji fermented iron (magceutics brand, been taking for 6 months) in the morning for…”

    owner comment via r/Supplements · 2026-09-01 · 3 upvotes
    2/5

    “Magtein also gives me insomnia.”

    owner comment via r/Supplements · 2026-05-05 · 2 upvotes
    1/5 Morning grogginessSide effects

    “FWIW I've taken Now magtein for 10 years and almost every time I've tried another brand I've had horrible racing heartbeat the next day.”

    owner comment via r/Supplements · 2026-08-12 · 2 upvotes
    3/5

    “Yep for me Threonate does not help me sleep.”

    owner comment via r/Supplements · 2026-06-02 · 1 upvotes

    Magtein (ingredient brand) on Amazon

    Example product · not Reddit-scored

    Magnesium L-Threonate, Magtein, Clinically Studied

    Brand on Reddit: 2.7 from 9 owner comments · Magtein (ingredient brand) owner reviews
    $29.95 on Amazon (price as of 2026-11-03). Prices change; check Amazon for the current price.
    Check Price on Amazon
    Example product · not Reddit-scored

    Life Extension Neuro-Mag Magnesium L-Threonate, 90 Vegetarian Capsules, Formulated with Magnesium L-Threonate to Support Memory Health

    Brand on Reddit: 2.7 from 9 owner comments · Magtein (ingredient brand) owner reviews
    $30.78 on Amazon (price as of 2026-11-03). Prices change; check Amazon for the current price.
    Check Price on Amazon

    Comparisons: Magtein (ingredient brand) vs Pure Encapsulations

    Ingredients these comments are about: Magnesium L-threonate (Magtein) (9).

    Last updated 2026-11-04. Brand comments are a subset of the ingredient comments.