Short answer: LSD is a synthetic lysergamide active in microgram amounts and typically lasting eight to twelve hours; psilocybin mushrooms are a natural product active in gram amounts and typically lasting four to six hours. Both act primarily at the 5-HT2A serotonin receptor.
A note before you read on
This article is educational and harm-reduction focused. Nothing here is medical advice, and nothing here should be read as encouragement to use a controlled substance. LSD is illegal in Canada outside of authorised research and special-access programmes. Shroom Bros Official does not sell LSD, acid tabs, LSD gummies or any lysergamide product. If you are worried about your own or someone else’s substance use, speak to a doctor or contact a local health line.
Duration and onset
| LSD | Psilocybin mushrooms | |
|---|---|---|
| Typical onset | 20–60 minutes | 20–40 minutes |
| Typical duration | 8–12 hours | 4–6 hours |
| Active amount | Micrograms | Grams of dried material |
| Source | Synthesised | Naturally occurring |
Reported character
Users commonly describe LSD as more stimulating, more visually geometric and longer-tailed, and psilocybin as more bodily, more emotionally weighted and shorter. These are aggregate impressions from survey data, not pharmacological facts — individual variation is enormous.
Predictability
Mushroom potency varies by species, growing conditions and drying, while blotter potency varies by how it was dosed and stored. Neither is reliably self-verifiable, which is why unknown-source material carries risk in both directions.
Tolerance
Both build tolerance fast and cross-tolerate with each other, because they share the same primary receptor target.
Legal status in Canada
Both LSD and psilocybin are controlled under the CDSA. Legal access exists only through clinical trials, the Special Access Programme or a section 56 exemption.
