Ostarin MK-2866

by Hardcore Formulations · capsule · 90 capsules

  • Off the market since September 2023 (NIH)
  • DSLD label 211475
  • Serving 2 capsules
  • 45 servings

Ostarin MK-2866 by Hardcore Formulations lists one ingredient: 25 mg of select androgen receptor modulator ostarin-MK-2866 per serving of 2 capsules. Its current label entered the NIH Dietary Supplement Label Database on January 25, 2020.

What is in Ostarin MK-2866?

Each row as the label prints it, per serving of 2 capsules. 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).

Ostarin MK-2866: Supplement Facts rows against the market (DSLD label 211475, January 2026 release)
IngredientAmount% DVAmong products listing it
Select Androgen Receptor Modulator Ostarin-MK-286625 mg

Source: NIH ODS Dietary Supplement Label Database, label 211475 (entered January 25, 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?

Every amount on this label with a position sits within the middle 80% of the products that list the same ingredient.

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.

  • OstaleanEPG same ingredients
  • Ostarine MK2866Panther Sports Nutrition · off the market same ingredients
  • Mk-2866Swoll Mafia · off the market same ingredients
  • OstarineSwole Labs same ingredients
  • S23Panther Sports Nutrition same ingredients
  • OxBoostMatrix Labs same ingredients

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 else is on the label?

Other ingredients: Gelatin, Silica, Magnesium Stearate.

How many labels does Ostarin MK-2866 have?

One label is on file, entered on January 25, 2020.

  1. Label 211475 (current) Entered January 25, 2020 · off the market September 28, 2023 · 90 capsules

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

Who makes it?

The label names Hardcore Formulations (manufacturer). All Hardcore Formulations products.

Where next?