PlainVitamins

Magnesium L-Threonate 800 mg

by Barlowe's Herbal Elixirs · capsule · 60 vegi-capsules

  • On the market (NIH)
  • DSLD label 307173
  • Serving 1 capsule
  • 60 servings

Magnesium L-Threonate 800 mg by Barlowe's Herbal Elixirs lists one ingredient: 800 mg of magnesium L-threonate per serving of 1 capsule. Its current label entered the NIH Dietary Supplement Label Database on March 22, 2024.

What is in Magnesium L-Threonate 800 mg?

Each row as the label prints it, per serving of 1 capsule. The capsule beside an amount places it among every product in the NIH database that lists the same ingredient: the bar is the middle half of their amounts, the line in it the median, the whiskers the 10th and 90th percentiles; the green tick is the FDA Daily Value and the red dashed tick the adult upper limit (IOM).

Magnesium L-Threonate 800 mg: Supplement Facts rows against the market (DSLD label 307173, January 2026 release)
IngredientAmount% DVAmong products listing it
Magnesium L-ThreonateTwo capsules provide 115 mg of pure magnesium which is 27% of the daily recommended value800 mg190%*

The label names the compound (Magnesium L-Threonate); its amount is likely the compound's weight, not the magnesium it holds, so it is not placed among other products.

* % Daily Value computed from the printed amount and the FDA Daily Value (21 CFR 101.9); the label prints none for that row.

Source: NIH ODS Dietary Supplement Label Database, label 307173 (entered March 22, 2024), version 9.4.0. See the label on DSLD or its label image (PDF). Amounts are what the maker printed; DSLD does not test products. Daily Values: the FDA's Daily Value page.

Is that a lot?

Every amount on this label with a position sits within the middle 80% of the products that list the same ingredient.

The NIH database records 2 to 3 servings a day from the label's directions; its % Daily Values are for adults and children 4 or more years of age. The directions as printed are further down this page.

The Tolerable Upper Intake Level is the most of a nutrient per day, from food, water and supplements together, that is likely to pose no risk for almost all adults (Institute of Medicine, 2011). It does not apply under medical supervision. This page compares labels; it is not medical advice.

Sources: amounts from the DSLD label; Daily Values from 21 CFR 101.9(c)(8)(iv); adult upper limits from the Institute of Medicine's DRI summary tables (2011). How positions are computed.

Which products have the closest formulas?

6 products list the very same ingredients; the nearest amounts come first.

Source: ingredient lists of every product's current label in DSLD (version 9.4.0); similarity weights each shared ingredient by how rare it is.

What does the label say about taking it?

Quoted from the label as DSLD transcribed it: the maker's words, including any claim about what the product does, which the FDA has not evaluated and PlainVitamins does not endorse.

Directions
Directions: As a dietary supplement, take 1 capsule 2 or 3 times daily with food.
Warnings
May increase magnesium levels in the brain.
Warning: Consult your physician prior to using this product if you are pregnant, nursing, taking medication, or have a medical condition.
Allergens and what it does not contain
No stearates! No fillers, soy, corn, rice, wheat, yeast, dairy, artificial colors or flavors, or titanium dioxide. Non-GMO.

Source: label statements in DSLD label 307173.

What else is on the label?

Other ingredients: Cellulose.

How many labels does Magnesium L-Threonate 800 mg have?

One label is on file, entered on March 22, 2024.

  1. Label 307173 (current) Entered March 22, 2024 · on the market · 60 vegi-capsules

Source: DSLD label entry and market events, version 9.4.0 (labels entered through September 25, 2025).

Who makes it?

The label names Barlowe's Herbal Elixirs LLC (distributor), Stuart, FL. All Barlowe's Herbal Elixirs products.

Where next?