Not sure about the weight concentration in truffles, but for fresh mushrooms, if my memory doesn't fail me, the weight for a similar psilocybin dosage is about

Not sure about the weight concentration in truffles, but for fresh mushrooms, if my memory doesn't fail me, the weight for a similar psilocybin dosage is about 10:1, so 50g of fresh mushrooms would be the equivalent of 5g of dried ones.