PlainVitamins

Seal on the label

Certified gluten-free (GFCO) on supplement labels

2,295 products in the NIH Dietary Supplement Label Database print the Certified gluten-free (GFCO) on their label, 1,878 of them on the market; they list vitamin D 1.8 times as often as supplements overall (23% against 13%); 52% list at least one vitamin (DSLD version 9.4.0, January 2026).

Data: NIH ODS Dietary Supplement Label Database, version 9.4.0, current labels; Daily Values 21 CFR 101.9.

The Gluten-Free Certification Organization (GFCO) certifies products tested to its gluten threshold. To confirm a product, use GFCO's site.

What kinds of ingredient do products printing the Certified gluten-free (GFCO) list?

The share of products printing the Certified gluten-free (GFCO) listing at least one ingredient of each kind (how kinds are counted):

Certified gluten-free (GFCO): share listing each kind of ingredient

2,295 products; a product counts once per kind.

Certified gluten-free (GFCO): share listing each kind of ingredientVitamins52%Botanicals49%Minerals39%Other compounds34%Probiotic strains11%Amino acids8%Fats and oils6%Enzymes6%
Certified gluten-free (GFCO): share listing each kind of ingredientVitamins52%Botanicals49%Minerals39%Other compounds34%Probiotic strains11%Amino acids8%Fats and oils6%Enzymes6%
Certified gluten-free (GFCO): share listing each kind of ingredientVitamins52%Botanicals49%Minerals39%Other compounds34%Probiotic strains11%Amino acids8%Fats and oils6%Enzymes6%
Certified gluten-free (GFCO): share listing each kind of ingredientVitamins52%Botanicals49%Minerals39%Other compounds34%Probiotic strains11%Amino acids8%Fats and oils6%Enzymes6%
Certified gluten-free (GFCO): share listing each kind of ingredientVitamins52%Botanicals49%Minerals39%Other compounds34%Probiotic strains11%Amino acids8%Fats and oils6%Enzymes6%

Source: Supplement Facts rows of each product's current label, NIH ODS Dietary Supplement Label Database version 9.4.0, by the ingredient category DSLD records.

What do products printing the Certified gluten-free (GFCO) contain?

Vitamin C is the single ingredient they list most (24% of them), then vitamin D (23%) and vitamin B6 (21%). The table sets their median amount per serving against the median of every product listing the same ingredient.

Certified gluten-free (GFCO): the ingredients most often listed (2,295 products, DSLD version 9.4.0)
IngredientShare listing itMedian hereAll products
Vitamin C24%90 mg100 mg
Vitamin D23%16.8 mcg15 mcg
Vitamin B621%4.3 mg6 mg
Vitamin B1221%18 mcg36 mcg
Calcium20%100 mg115 mg
Magnesium20%65.75 mg86 mg
Folate19%400 mcg400 mcg
Niacin17%20 mg20 mg
Pantothenic Acid (Vitamin B5)17%10 mg12 mg
Riboflavin17%2 mg4 mg
Zinc16%8 mg11 mg
Vitamin E16%30 IU30 IU
Biotin16%135 mcg200 mcg
Vitamin A15%2,500 IU4,000 IU
Thiamin15%2 mg5 mg

Source: Supplement Facts rows of each product's current label, NIH ODS Dietary Supplement Label Database version 9.4.0.

What kinds of products are they?

Certified gluten-free (GFCO) by DSLD product type

Certified gluten-free (GFCO) by product typeOther Combinations977Botanical with Nutrients273Botanical247Non-Nutrient/Non-Botanical240Vitamin224Mineral126Amino acid/Protein89Fat/Fatty Acid50
Certified gluten-free (GFCO) by product typeOther Combinations977Botanical with Nutrients273Botanical247Non-Nutrient/Non-Botanical240Vitamin224Mineral126Amino acid/Protein89Fat/Fatty Acid50
Certified gluten-free (GFCO) by product typeOther Combinations977Botanical with Nutrients273Botanical247Non-Nutrient/Non-Botanical240Vitamin224Mineral126Amino acid/Protein89Fat/Fatty Acid50
Certified gluten-free (GFCO) by product typeOther Combinations977Botanical with Nutrients273Botanical247Non-Nutrient/Non-Botanical240Vitamin224Mineral126Amino acid/Protein89Fat/Fatty Acid50
Certified gluten-free (GFCO) by product typeOther Combinations977Botanical with Nutrients273Botanical247Non-Nutrient/Non-Botanical240Vitamin224Mineral126Amino acid/Protein89Fat/Fatty Acid50

Brands with the most: Country Life (432), Pure Encapsulations (401), Solgar (205), Metagenics (191), New Chapter (109), Sundown Naturals (85), MegaFood (79), Garden of Life MyKind Organics (63), Arbonne (58), Garden of Life (55).

Which products are they?

60 of the 2,295: on-market products first, the newest label first. Each ingredient page lists every product that contains it.

Source: NIH ODS Dietary Supplement Label Database version 9.4.0. How products are chosen: a seal or certification named in the label's printed statements, as DSLD transcribed them; the certifier's own list is where to confirm it.

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