PlainVitamins

GTC Formula

by Bronson · tablet or pill · 180 tablets

  • On the market (NIH)
  • UPC 7 16563 12201 0
  • DSLD label 8509
  • Serving 1 tablet

GTC Formula by Bronson lists 19 ingredients, 19 with an amount per serving of 1 tablet, such as 2,500 IU of vitamin A, 250 mg of vitamin C, 50 IU (1.25 mcg) of vitamin D and 100 IU of vitamin E. Its current label entered the NIH Dietary Supplement Label Database on June 1, 2012.

What is in GTC Formula?

Each row as the label prints it, per serving of 1 tablet. 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).

GTC Formula: Supplement Facts rows against the market (DSLD label 8509, January 2026 release)
IngredientAmount% DVAmong products listing it
Vitamin Aas Vitamin A PalmitateVitamin A (Form: as Vitamin A Palmitate)2,500 IU50%Vitamin A in GTC Formula against 5,772 products2,500 IU per serving; the middle half of products list 2,000 IU to 5,000 IU, the median 4,000 IU.2,500 IU

59% of 5,772 products listing vitamin A give more (median 4,000 IU).

Vitamin Cas Ascorbic Acid250 mg417%Vitamin C in GTC Formula against 18,583 products250 mg per serving; the middle half of products list 60 mg to 270 mg, the median 100 mg.DV 90 mgUL 2,000 mg250 mg

Higher than 68% of 18,583 products listing vitamin C (median 100 mg).

Vitamin Das CholecalciferolVitamin D (Form: as Cholecalciferol)50 IU (1.25 mcg)13%Vitamin D in GTC Formula against 14,175 products1.25 mcg per serving; the middle half of products list 10 mcg to 25 mcg, the median 15 mcg.DV 20 mcgUL 100 mcg1.25 mcg

97% of 14,175 products listing vitamin D give more (median 15 mcg).

Vitamin Eas D-Alpha-Tocopheryl SuccinateVitamin E (Form: as D-Alpha Tocopheryl Succinate)100 IU333%Vitamin E in GTC Formula against 6,459 products100 IU per serving; the middle half of products list 15 IU to 100 IU, the median 30 IU.100 IU

Higher than 71% of 6,459 products listing vitamin E (median 30 IU).

Thiamineas Thiamine MononitrateThiamine (Form: as Thiamine Mononitrate)50 mg3,333%Thiamin in GTC Formula against 9,830 products50 mg per serving; the middle half of products list 1.5 mg to 25 mg, the median 5 mg.DV 1.2 mg50 mg

Higher than 82% of 9,830 products listing thiamin (median 5 mg).

Riboflavin33.3 mg1,959%Riboflavin in GTC Formula against 9,824 products33.3 mg per serving; the middle half of products list 1.7 mg to 25 mg, the median 4 mg.DV 1.3 mg33.3 mg

Higher than 84% of 9,824 products listing riboflavin (median 4 mg).

Niacinas NiacinamideNiacin (Form: as Niacinamide)125 mg625%Niacin in GTC Formula against 12,413 products125 mg per serving; the middle half of products list 13.2 mg to 48 mg, the median 20 mg.DV 16 mgUL 35 mg125 mg

Higher than 93% of 12,413 products listing niacin (median 20 mg). 3.6 times the adult UL a day.

Vitamin B6as Pyridoxine HydrochlorideVitamin B-6 (Form: as Pyridoxine HCl)58.3 mg2,915%Vitamin B6 in GTC Formula against 15,277 products58.3 mg per serving; the middle half of products list 2 mg to 20 mg, the median 6 mg.DV 1.7 mgUL 100 mg58.3 mg

Higher than 94% of 15,277 products listing vitamin B6 (median 6 mg).

Folateas Folic Acid66.6 mcg17%Folate in GTC Formula against 7,022 products66.6 mcg per serving; the middle half of products list 200 mcg to 400 mcg, the median 400 mcg.66.6 mcg

93% of 7,022 products listing folate give more (median 400 mcg).

Vitamin B12as CyanocobalaminVitamin B-12 (Form: as Cyanocobalamin)166.6 mcg2,777%Vitamin B12 in GTC Formula against 14,425 products166.6 mcg per serving; the middle half of products list 6 mcg to 200 mcg, the median 36 mcg.DV 2.4 mcg166.6 mcg

Higher than 73% of 14,425 products listing vitamin B12 (median 36 mcg).

Biotin50 mcg17%Biotin in GTC Formula against 9,447 products50 mcg per serving; the middle half of products list 50 mcg to 300 mcg, the median 200 mcg.DV 30 mcg50 mcg

73% of 9,447 products listing biotin give more (median 200 mcg).

Pantothenic Acidas Calcium D-PantothenatePantothenic Acid (Form: as Calcium D-Pantothenate)75 mg750%Pantothenic Acid (Vitamin B5) in GTC Formula against 10,060 products75 mg per serving; the middle half of products list 6 mg to 50 mg, the median 12 mg.DV 5 mg75 mg

Higher than 83% of 10,060 products listing pantothenic acid (vitamin B5) (median 12 mg).

Calciumas Calcium CarbonateCalcium (Form: as Calcium Carbonate)66.6 mg7%Calcium in GTC Formula against 17,831 products66.6 mg per serving; the middle half of products list 50 mg to 252 mg, the median 115 mg.DV 1,300 mgUL 2,500 mg66.6 mg

66% of 17,831 products listing calcium give more (median 115 mg).

Ironas Ferrous FumarateIron (Form: as Ferrous Fumarate)1.25 mg7%Iron in GTC Formula against 6,910 products1.25 mg per serving; the middle half of products list 1.2 mg to 18 mg, the median 5 mg.DV 18 mgUL 45 mg1.25 mg

75% of 6,910 products listing iron give more (median 5 mg).

Iodineas Potassium IodideIodine (Form: as Potassium Iodide)24 mcg16%Iodine in GTC Formula against 6,382 products24 mcg per serving; the middle half of products list 75 mcg to 150 mcg, the median 150 mcg.DV 150 mcgUL 1,100 mcg24 mcg

95% of 6,382 products listing iodine give more (median 150 mcg).

Magnesiumas Magnesium OxideMagnesium (Form: as Magnesium Oxide)50 mg13%Magnesium in GTC Formula 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).

Zincas Zinc OxideZinc (Form: as Zinc Oxide)5 mg33%Zinc in GTC Formula 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).

Copperas Copper GluconateCopper (Form: as Copper Gluconate)0.3 mg15%Copper in GTC Formula against 6,468 products0.3 mg per serving; the middle half of products list 0.5 mg to 2 mg, the median 1 mg.DV 0.9 mgUL 10 mg0.3 mg

83% of 6,468 products listing copper give more (median 1 mg).

Manganeseas Manganese GluconateManganese (Form: as Manganese Gluconate)0.5 mg25%Manganese in GTC Formula against 7,016 products0.5 mg per serving; the middle half of products list 1 mg to 3.92 mg, the median 2 mg.DV 2.3 mgUL 11 mg0.5 mg

86% of 7,016 products listing manganese give more (median 2 mg).

Source: NIH ODS Dietary Supplement Label Database, label 8509 (entered June 1, 2012), version 9.4.0. See the label on DSLD. 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:

  • 97% of the 14,175 products that print an amount of vitamin D list more than its 1.25 mcg (50 IU) of vitamin D (median 15 mcg (600 IU)).
  • At 1 serving a day, the most its directions give, the label lists 125 mg of niacin, 3.6 times the adult Tolerable Upper Intake Level.
  • Its 58.3 mg of vitamin B6 is higher than 94% of the 15,277 vitamin B6 products that print an amount; 943 list more.
  • 93% of the 7,022 products that print an amount of folate list more than its 66.6 mcg of folate (median 400 mcg).
  • 95% of the 6,382 products that print an amount of iodine list more than its 24 mcg of iodine (median 150 mcg).
  • 86% of the 7,016 products that print an amount of manganese list more than its 0.5 mg of manganese (median 2 mg).

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
DIRECTIONS: As a dietary supplement, adults and children 12 or more years of age, 1 tablet daily or as directed by a health professional.
Warnings
WARNING: Accidental overdose of iron-containing products is a leading cause of fatal poisoning in children under 6. Keep this product out of reach of children. In case of accidental overdose, call a doctor or Poison Control Center immediately.
Storage
Store at room temperature. Protect from light.

Source: label statements in DSLD label 8509.

What else is on the label?

Other ingredients: Croscarmellose Sodium, Cellulose, Silica, Stearic Acid, Magnesium Stearate, Hydroxypropyl Methylcellulose, Titanium Dioxide, Talc, Triacetin, Carnauba Wax.

How many labels does GTC Formula have?

One label is on file, entered on June 1, 2012.

  1. Label 8509 (current) Entered June 1, 2012 · on the market · 180 tablets · UPC 7 16563 12201 0

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

Who makes it?

The label names Bronson Laboratories (manufacturer), Lindon, UT. All Bronson products.

Where next?