I am sometimes asked why some Schizandra berries appear to have a bloom coating them & some not & as far as I can ascertain the answer is simply because some of the harvest comes from Northern China (apparently the best quality) & from where this product was derived & some from the Southern provinces. It is colder in the north & the berries there are often frosted & better for it before harvesting (as in Sloe berries here where the folklore is that one shouldn’t pick them before the first frosts) the theory being that the frost concentrates & preserves better the chemical constituents in the dried fruit. Schizandra products are derived from the small, bright red, berry-like fruit of a hardy vine of the magnolia family. Schizandra is native to China as well as parts of Japan, Korea, & Russia. Two dozen additional species of schizandra also exist, all indigenous to Asia with the exception of a relatively rare schizandra vine native to woody areas of North Carolina & neighboring states. The Chinese refer to dried schizandra berries as wu-wei-zi. Schizandra Berries | Whole Or Powdered - Schisandra Chinensis