Mushroom Gummies by Bloom For Sale. One huge gummy containing 1.5 grams of active psilocybin mushrooms makes up Gummy by Bloom. Some unique benefits and very pleasurable therapeutic effects may be provided by microdosing. Furthermore, microdosing has the potential to have a strong and potentially reality-altering effect. Driving or engaging in any other activity that is not advised in this situation should be avoided.