A good quality mulberry leaf extract should be bright green in colour. On the other hand, if the mulberry leaf extract is a duller green, it may suggest that it is of a  lower quality.

Low temperature processing can help retain the precious nutrients and active compounds of the mulberry leaf. Mulbiotic is processed in low temperature with no chemicals used to ensure its phenolic acids and flavonols are optimally retained.

Not all mulberries are equal. Mulberry trees grown on the coastal regions are sturdier from having to withstand the harsh conditions. Hence, the fruits they bear are richer in nutrients. Mulbiotic is made from the leaves of white mulberry trees grown along the coastal regions of Japan.