What is YK-11?
The short answer
YK-11 is a lab-made compound with a steroid shape, studied in research on the same system as male hormones.
- 5 sources
- Status as of
- How we source
- Ellum doesn't sell peptides.
Get updates on YK-11
What it is
- Also known as
- ykarine
Regulatory status
Not FDA-approved How we label status
As of October 4, 2026, YK-11 is not FDA-approved for any use and is not on FDA's 503A bulks list.
- Federal (FDA)
- Not FDA-approved; FDA ingredient directory category 2; named in FDA fraudulent-products notice (GE Labs Ykarine)
- 503A compounding
- No category; not on 216.23 as of 2026-10-07 (as of October 7, 2026)
- WADA 2026
- S1.2 (named YK-11)
References
Sources as of October 4, 2026
- FDA: www.fda.gov/food/dietary-supplements/information-select-dietary-supplement-ingredients-and-other-substances
- FDA: www.fda.gov/drugs/fraudulent-products/certain-bodybuilding-products-put-consumers-risk-heart-attack-stroke-serious-liver-damage-and-more
- FDA warning letter, December 12, 2025
- WADA: www.wada-ama.org/sites/default/files/2025-09/2026list_en_final_clean_september_2025.pdf
- eCFR: www.ecfr.gov/current/title-21/chapter-I/subchapter-C/part-216/subpart-B/section-216.23