SHEET /m/pregnenolone · PubChem CID 8955 · CAS 145-13-1 · REV 2026.07
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Pregnenolone
from sourceC21H32O2 · 316.5 g/mol
Pregneton · Regnosone · Skinostelon · Pregnolon
What is Pregnenolone?
The first steroid the body makes from cholesterol, and the ancestor of every other steroid hormone including cortisol, testosterone, and estrogen. from source
CategoryBody
LeaderboardsBiggest
Fig. 1 · 2D structure RDKit
SMILES
CC(=O)[C@H]1CC[C@@H]2[C@@]1(CC[C@H]3[C@H]2CC=C4[C@@]3(CC[C@@H](C4)O)C)CWhere you'll find it
Your own body makes this one. It is not an ingredient you buy. See the rest of the body group.
Toxicity & hazards
WarningIrritantHealth hazardH302, H312, H332, H351, H361from source
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Where Pregnenolone leads
Relatedcomputed
Dehydroepiandrosterone61% similarBoth carry an alcohol and a ketone group.Cholesterol57% similarBoth carry an alcohol group.Progesterone56% similarBoth carry a ketone group.Allopregnanolone53% similarBoth carry an alcohol and a ketone group.Testosterone40% similarBoth carry an alcohol and a ketone group.