PlainVitamins

ButyrEN

by Allergy Research Group · capsule · 100 delayed-release vegetarian capsules

  • On the market (NIH)
  • UPC 7 13947 70220 2
  • DSLD label 258058
  • Serving 1 to 2 capsules; amounts per 1 capsule
  • 50 servings

ButyrEN by Allergy Research Group lists 3 ingredients, 3 with an amount per serving of 1 capsule, such as 180 mg of calcium, 170 mg of magnesium and 200 mg of butyric acid. Its current label entered the NIH Dietary Supplement Label Database on December 18, 2021.

What is in ButyrEN?

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).

ButyrEN: Supplement Facts rows against the market (DSLD label 258058, January 2026 release)
IngredientAmount% DVAmong products listing it
Calciumas Calcium Butyrate, Calcium PhosphateCalcium (Form: as Calcium Butyrate, and Calcium Phosphate)180 mg14%Calcium in ButyrEN against 17,831 products180 mg per serving; the middle half of products list 50 mg to 252 mg, the median 115 mg.DV 1,300 mgUL 2,500 mg180 mg

Higher than 62% of 17,831 products listing calcium (median 115 mg). Per day at the most servings: 540 mg.

Magnesiumas Magnesium Butyrate, Magnesium OxideMagnesium (Form: as Magnesium Butyrate, and Magnesium Oxide)170 mg40%Magnesium in ButyrEN against 14,003 products170 mg per serving; the middle half of products list 30 mg to 200 mg, the median 86 mg.UL 350 mgDV 420 mg170 mg

Higher than 74% of 14,003 products listing magnesium (median 86 mg). Per day at the most servings: 510 mg. 1.5 times the adult UL a day.

Butyric Acidas Calcium Butyrate, Magnesium ButyrateButyric Acid (Form: as Calcium Butyrate, and Magnesium Butyrate)200 mg

Source: NIH ODS Dietary Supplement Label Database, label 258058 (entered December 18, 2021), 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:

  • At 3 servings a day, the most its directions give, the label lists 510 mg of magnesium, 1.5 times the adult Tolerable Upper Intake Level.

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?

3 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
Suggested use As a dietary supplement, 1 or 2 capsules three times daily with or without food, or as directed by a healthcare practitioner.
Warnings
Warning: Consuming this product can expose you to lead which is known to the State of California to cause birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov/food
Storage
Keep in a cool, dry place, tightly capped.

Source: label statements in DSLD label 258058.

What else is on the label?

Other ingredients: Hydroxypropyl Methylcellulose, Water, Gellan Gum, Magnesium Stearate, Silicon Dioxide.

How many labels does ButyrEN have?

11 labels are on file under this name since April 25, 2013: other sizes, label designs and reformulations. The current one leads this page.

  1. Label 258058 (current) Entered December 18, 2021 · on the market · 100 delayed-release vegetarian capsules · UPC 7 13947 70220 2
  2. Label 258057 Entered December 18, 2021 · on the market · 100 delayed release vegetarian capsules · UPC 7 13947 70220 2
  3. Label 233065 Entered August 23, 2020 · off the market August 2, 2021 · 100 delayed-release vegetarian capsules · UPC 7 13947 70220 2
  4. Label 233064 Entered August 23, 2020 · off the market August 2, 2021 · 100 delayed release vegetarian capsules · UPC 7 13947 70220 2
  5. Label 207708 Entered October 23, 2019 · off the market August 4, 2020 · 100 delayed release vegetarian capsules · UPC 7 13947 70220 2
  6. Label 207649 Entered October 23, 2019 · off the market August 4, 2020 · 100 delayed release vegetarian capsules · UPC 7 13947 70220 2
  7. Label 184039 Entered January 7, 2019 · off the market June 26, 2019 · 100 gastric-resistant tablets · UPC 7 13947 70220 2
  8. Label 78488 Entered September 21, 2017 · off the market June 26, 2019 · 100 enteric coated tablets · UPC 7 13947 70220 2
  9. Label 78478 Entered September 21, 2017 · off the market July 19, 2018 · 100 enteric coated tablets · UPC 7 13947 70220 2
  10. Label 54270 Entered January 25, 2016 · off the market July 31, 2017 · 100 tablets · UPC 7 13947 70220 2
  11. Label 20167 Entered April 25, 2013 · off the market November 19, 2015 · 100 tablets · UPC 7 13947 70220 2

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

Who makes it?

The label names Allergy Research Group (distributor), South Salt Lake, UT. All Allergy Research Group products.

Where next?