Blue bruising: what it actually means for potency and freshness
178 replies · Strain Discussion
Every time I handle fresh mushrooms they bruise blue-green where they're touched. I've heard this indicates psilocybin content. Is there a relationship between bruising intensity and potency? Does the blue-green color represent degradation of psilocin?
The blue color is psilocin oxidation — psilocin is unstable and rapidly converts to a blue compound (possibly psilocyl quinone methide) when exposed to air. Strong bluing DOES tend to correlate with higher psilocin content (not psilocybin, which is more stable). But there's significant individual variation in how oxidizable a given sample is.
What bluing does NOT mean: degradation of potency in the mushroom overall. The blue compound is a surface reaction. The psilocybin deeper in the tissue hasn't degraded. Over-handling can cause some loss from the tissue surface, but the blue color itself doesn't mean your mushrooms are less potent.
Practical implication: handle your mushrooms minimally during harvest and drying to reduce psilocin oxidation at the surface. This isn't critical for home growers but matters more if you're trying to preserve maximum surface-accessible psilocin content.
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