Short answer: there is no reliable way to know. Blotter is not a manufactured pharmaceutical, there is no quality control, and analysis programmes have reported enormous variation between and within sheets.
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.
What analysis programmes have reported
Public drug-checking services and academic surveys have historically reported blotter samples ranging from barely detectable amounts up to several times the commonly assumed “standard”, along with a meaningful share of samples containing no lysergamide at all. The commonly repeated figures circulating online are folklore, not measurement.
Why variance is unavoidable
- Solution concentration — decided by whoever prepared it, with no verification.
- Application method — dipping and dropping distribute unevenly across a sheet.
- Degradation — light, heat, oxygen and humidity break lysergamides down invisibly.
- Substitution — the compound may not be a lysergamide at all.
What testing can and cannot do
Reagent kits can indicate the presence of a lysergamide and rule out several dangerous substitutes, but they cannot quantify. Only laboratory analysis, available through some Canadian drug-checking services, gives a quantity — and even then only for the specific piece submitted.
The takeaway
Any sentence beginning “a tab contains…” is a guess. Treat published averages as trivia, not as information you can act on.
