5-Mthf

by Priority One Nutritional Supplements · capsule · 120 capsules

  • On the market (NIH)
  • UPC 8 15354 02179 9
  • DSLD label 277332
  • Serving 1 capsule
  • 120 servings

5-Mthf by Priority One Nutritional Supplements lists one ingredient: 1,700 mcg DFE of folate per serving of 1 capsule. Its current label entered the NIH Dietary Supplement Label Database on May 24, 2023.

What is in 5-Mthf?

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).

5-Mthf: Supplement Facts rows against the market (DSLD label 277332, January 2026 release)
IngredientAmount% DVAmong products listing it
Folateas [6S]-5-Methyltetrahydrofolic AcidEquivalent to 1,852 mcg of (6s)-5-methyltetrahydrofolic acid, glucosamine salt) (Quatrefolic)1,700 mcg DFE425%

Source: NIH ODS Dietary Supplement Label Database, label 277332 (entered May 24, 2023), 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 one serving 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
Recommendations: Take one (1) capsule daily, or as directed by your physician.
Warnings
Warning: If you are pregnant or breast feeding, consult your physician before using this product.
Keep out of reach of children.
For professional use only.
Allergens and what it does not contain
Contains no preservatives.
Non-GMO
Storage
Keep container tightly closed, store in a cool, dry place.

Source: label statements in DSLD label 277332.

What else is on the label?

Other ingredients: Rice Chelate, Gelatin, Water, Purified.

Seals and symbols as the label prints them (the maker's; a certifier's own list confirms a seal): GMP Certified.

How many labels does 5-Mthf have?

2 labels are on file under this name since September 25, 2020: other sizes, label designs and reformulations. The current one leads this page.

  1. Label 277332 (current) Entered May 24, 2023 · on the market · 120 capsules · UPC 8 15354 02179 9
  2. Label 235579 Entered September 25, 2020 · off the market March 16, 2022 · 120 capsules · UPC 8 15354 02179 9

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

Who makes it?

The label names Priority One Nutritional Supplements, Inc. (distributor). All Priority One Nutritional Supplements products.

Where next?