PlainVitamins

GlucoFunction

by Pure Encapsulations · capsule · 90 capsules

  • On the market (NIH)
  • UPC 7 66298 01030 4
  • DSLD label 277679
  • Serving 1 capsule
  • 90 servings

GlucoFunction by Pure Encapsulations lists 10 ingredients, 10 with an amount per serving of 1 capsule, such as 66 mg of vitamin C, 2,000 mg of biotin, 50 mg of magnesium and 5 mg of zinc. Its current label entered the NIH Dietary Supplement Label Database on March 22, 2023.

What is in GlucoFunction?

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).

GlucoFunction: Supplement Facts rows against the market (DSLD label 277679, January 2026 release)
IngredientAmount% DVAmong products listing it
Vitamin Cas Ascorbic Acid66 mg73%Vitamin C in GlucoFunction against 18,583 products66 mg per serving; the middle half of products list 60 mg to 270 mg, the median 100 mg.DV 90 mgUL 2,000 mg66 mg

64% of 18,583 products listing vitamin C give more (median 100 mg). Per day at the most servings: 198 mg.

Biotin2,000 mg6,667%

This amount is far outside what other labels list for biotin, or disagrees with the label's own %DV: possibly a unit or transcription slip in the database. Check the label image on DSLD.

Magnesiumas Magnesium CitrateMagnesium (Form: as Magnesium Citrate)50 mg12%Magnesium in GlucoFunction against 14,003 products50 mg per serving; the middle half of products list 30 mg to 200 mg, the median 86 mg.UL 350 mgDV 420 mg50 mg

59% of 14,003 products listing magnesium give more (median 86 mg). Per day at the most servings: 150 mg.

Zincas Zinc CitrateZinc (Form: as Zinc Citrate)5 mg45%Zinc in GlucoFunction against 13,186 products5 mg per serving; the middle half of products list 5 mg to 15 mg, the median 11 mg.DV 11 mgUL 40 mg5 mg

72% of 13,186 products listing zinc give more (median 11 mg). Per day at the most servings: 15 mg.

Chromiumas Chromium PolynicotinateChromium (Form: as Chromium Polynicotinate)133 mcg380%Chromium in GlucoFunction against 7,825 products133 mcg per serving; the middle half of products list 45 mcg to 200 mcg, the median 100 mcg.DV 35 mcg133 mcg

Higher than 68% of 7,825 products listing chromium (median 100 mcg). Per day at the most servings: 399 mcg.

Vanadiumas Bis-Glycinato OxoVanadiumVanadium (Form: as Bis-Glycinato Oxo Vanadium (Alt. Name: BGOV))500 mcgVanadium in GlucoFunction against 1,744 products500 mcg per serving; the middle half of products list 10 mcg to 100 mcg, the median 25 mcg.UL 1,800 mcg500 mcg

Higher than 92% of 1,744 products listing vanadium (median 25 mcg). Per day at the most servings: 1,500 mcg.

Alpha Lipoic Acid100 mgAlpha Lipoic Acid in GlucoFunction against 2,407 products100 mg per serving; the middle half of products list 25 mg to 150 mg, the median 50 mg.100 mg

Higher than 56% of 2,407 products listing alpha lipoic acid (median 50 mg). Per day at the most servings: 300 mg.

Cinnamon (Cinnamomum cassia) extract83 mgCinnamon in GlucoFunction against 601 products83 mg per serving; the middle half of products list 50 mg to 500 mg, the median 200 mg.83 mg

69% of 601 products listing cinnamon give more (median 200 mg). Per day at the most servings: 249 mg.

Gymnema (Gymnema sylvestre) extract50 mgGymnema in GlucoFunction against 444 products50 mg per serving; the middle half of products list 67 mg to 323.33 mg, the median 200 mg.50 mg

77% of 444 products listing gymnema give more (median 200 mg). Per day at the most servings: 150 mg.

Bitter Melon (Momordica charantia) extract75 mgBitter Melon in GlucoFunction against 273 products75 mg per serving; the middle half of products list 50 mg to 450 mg, the median 125 mg.75 mg

64% of 273 products listing bitter melon give more (median 125 mg). Per day at the most servings: 225 mg.

Source: NIH ODS Dietary Supplement Label Database, label 277679 (entered March 22, 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?

The rows in the top or bottom tenth of the products that list the same ingredient, and any above the adult upper limit at the most servings a day the directions give:

  • Its 500 mcg of vanadium is higher than 92% of the 1,744 vanadium products that print an amount; 120 list more.

The NIH database records 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?

The products whose ingredient lists overlap most with GlucoFunction's, rare ingredients counting for more.

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: As a dietary supplement, take 1 capsule, 3 times daily, before meals.
Warnings
Warning: Not to be taken by pregnant or lactating women. If you have any health condition or are taking any medication, consult your health professional before use.
Keep out of the reach of children.
Use only if safety seal is intact.
Allergens and what it does not contain
Gluten-free, Non-GMO & Hypoallergenic
Storage
Store in a cool, dry place.

Source: label statements in DSLD label 277679.

What else is on the label?

Other ingredients: Vegetarian Capsule.

Seals and symbols as the label prints them (the maker's; a certifier's own list confirms a seal): GFCO.org Certified Gluten-Free by the Gluten-Free Certification Organization, www.gluten.org. Listed with: Certified gluten-free (GFCO) (a seal is the label's claim; the certifier's own list confirms it).

How many labels does GlucoFunction have?

8 labels are on file under this name since January 7, 2019: other sizes, label designs and reformulations. The current one leads this page.

  1. Label 277679 (current) Entered March 22, 2023 · on the market · 90 capsules · UPC 7 66298 01030 4
  2. Label 277678 Entered March 22, 2023 · on the market · 180 capsules · UPC 7 66298 01029 8
  3. Label 246101 Entered March 25, 2021 · off the market March 22, 2022 · 90 capsules · UPC 7 66298 01030 4
  4. Label 246100 Entered March 25, 2021 · off the market March 22, 2022 · 180 capsules · UPC 7 66298 01029 8
  5. Label 218878 Entered April 23, 2020 · off the market November 21, 2018 · 180 capsules · UPC 7 66298 01029 8
  6. Label 218874 Entered April 23, 2020 · off the market November 27, 2018 · 90 capsules · UPC 7 66298 01030 4
  7. Label 184303 Entered February 25, 2019 · off the market December 16, 2020 · 180 capsules · UPC 7 66298 01029 8
  8. Label 184466 Entered January 7, 2019 · off the market December 16, 2020 · 90 capsules · UPC 7 66298 01030 4

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

Who makes it?

The label names Pure Encapsulations (manufacturer), Sudbury, MA. All Pure Encapsulations products.

Where next?