PlainVitamins

Gammadyn S

by UNDA Gammadyn · liquid · 30 ampoules

  • On the market (NIH)
  • UPC 883196 31400
  • DSLD label 56250
  • Serving 0.07 fl. oz. (1 ampoule)
  • 30 servings

Gammadyn S by UNDA Gammadyn lists one ingredient: 122 mcg of sulfur per serving of 0.07 fl. oz.. Its current label entered the NIH Dietary Supplement Label Database on February 23, 2016.

What is in Gammadyn S?

Each row as the label prints it, per serving of 0.07 fl. oz.. 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).

Gammadyn S: Supplement Facts rows against the market (DSLD label 56250, January 2026 release)
IngredientAmount% DVAmong products listing it
Sulfuras Sodium Thiosulfate122 mcgSulfur in Gammadyn S against 161 products0.122 mg per serving; the middle half of products list 13 mg to 100 mg, the median 29.2 mg.0.122 mg

99% of 161 products listing sulfur give more (median 29.2 mg). Per day at the most servings: 0.244 mg.

Source: NIH ODS Dietary Supplement Label Database, label 56250 (entered February 23, 2016), 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:

  • 99% of the 161 products that print an amount of sulfur list more than its 0.122 mg of sulfur (median 29.2 mg).

The NIH database records 1 to 2 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?

2 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
Recommended Dose: Adults (19 years and older): Take one ampoule one to two times daily, or as recommended by your healthcare practitioner. Squeeze contents directly into mouth. Use for one to two months, or as recommended by your healthcare practitioner.
Warnings
Safety-sealed for your protection and for product freshness. Do not use if ampoule is broken.
Risk Information: If symptoms persist or worsen, consult your healthcare practitioner.
If you are pregnant or breastfeeding, do not use, unless directed by your healthcare practitioner.
Storage
Store in a cool, dry place.

Source: label statements in DSLD label 56250.

What else is on the label?

Other ingredients: purified Water, Glucose.

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

How many labels does Gammadyn S have?

One label is on file, entered on February 23, 2016.

  1. Label 56250 (current) Entered February 23, 2016 · on the market · 30 ampoules · UPC 883196 31400

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

Who makes it?

The label names Seroyal USA Inc. (distributor), Wood Dale, IL, 60191. All UNDA Gammadyn products.

Where next?