PlainVitamins

C-Buff

by Bio-Tech Pharmacal · powder · 8 oz

  • On the market (NIH)
  • UPC 7 05105 09790 9
  • DSLD label 217271
  • Serving 1 tsp
  • 70 servings

C-Buff by Bio-Tech Pharmacal lists 5 ingredients, 5 with an amount per serving of 1 tsp, such as 2,000 mg of vitamin C, 125 mg of magnesium, 15 mg of zinc and 2.5 mg of manganese. Its current label entered the NIH Dietary Supplement Label Database on April 23, 2020.

What is in C-Buff?

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

C-Buff: Supplement Facts rows against the market (DSLD label 217271, January 2026 release)
IngredientAmount% DVAmong products listing it
Vitamin Cas Ascorbic Acid, Magnesium Ascorbate, Manganese AscorbateVitamin C (Form: as Magnesium Ascorbate, Manganese Ascorbate, & Zinc Ascorbate) (Alt. Name: Ascorbic Acid)2,000 mg2,222%Vitamin C in C-Buff against 18,583 products2,000 mg per serving; the middle half of products list 60 mg to 270 mg, the median 100 mg.DV 90 mgUL 2,000 mg2,000 mg

Higher than over 99% of 18,583 products listing vitamin C (median 100 mg).

Magnesiumas Magnesium Ascorbate, Magnesium AspartateMagnesium (Form: as Magnesium Ascorbate, and Magnesium Aspartate)125 mg30%Magnesium in C-Buff against 14,003 products125 mg per serving; the middle half of products list 30 mg to 200 mg, the median 86 mg.UL 350 mgDV 420 mg125 mg

Higher than 66% of 14,003 products listing magnesium (median 86 mg).

Zincas Zinc AscorbateZinc (Form: as Zinc Ascorbate)15 mg136%Zinc in C-Buff against 13,186 products15 mg per serving; the middle half of products list 5 mg to 15 mg, the median 11 mg.DV 11 mgUL 40 mg15 mg

Higher than 56% of 13,186 products listing zinc (median 11 mg).

Manganeseas Manganese AscorbateManganese (Form: as Manganese Ascorbate)2.5 mg109%Manganese in C-Buff against 7,016 products2.5 mg per serving; the middle half of products list 1 mg to 3.92 mg, the median 2 mg.DV 2.3 mgUL 11 mg2.5 mg

Higher than 68% of 7,016 products listing manganese (median 2 mg).

Potassiumas Potassium AspartatePotassium (Form: as Potassium Aspartate)50 mg1%Potassium in C-Buff against 11,614 products50 mg per serving; the middle half of products list 50 mg to 190 mg, the median 99 mg.DV 4,700 mg50 mg

72% of 11,614 products listing potassium give more (median 99 mg).

Source: NIH ODS Dietary Supplement Label Database, label 217271 (entered April 23, 2020), 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:

  • Its 2,000 mg of vitamin C is higher than over 99% of the 18,583 vitamin C products that print an amount; 79 list more.

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.

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
Suggested Use: Sprinkle a teaspoon of powder into water. Stir briskly and drink, promptly.
Warnings
Keep out of the reach of children.
Safety sealed for your protection.
Allergens and what it does not contain
Contains No: Dairy, egg, fish, shellfish, nuts, wheat, gluten, soy, sugar, yeast, artificial preservatives, flavors, sweeteners or colors.
Gluten free Non GMO
Storage
Store tightly closed in a cool, dry place.

Source: label statements in DSLD label 217271.

What else is on the label?

Other ingredients: None.

Seals and symbols as the label prints them (the maker's; a certifier's own list confirms a seal): EarthKosher cGMP Current Good Manufacturing Practice Made in the USA.

How many labels does C-Buff have?

One label is on file, entered on April 23, 2020.

  1. Label 217271 (current) Entered April 23, 2020 · on the market · 8 oz · UPC 7 05105 09790 9

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

Who makes it?

The label names Bio-Tech (manufacturer), Fayetteville, AR. All Bio-Tech Pharmacal products.

Where next?