White Mulberry
White mulberry fruit is a whole food. Leaf extract is widely used in supplements.
What it is
Fruit and leaf of Morus alba, an Asian mulberry species; consumed fresh, dried, as juice, or as leaf extract.
Eaten as fruit; leaves used for tea and as a botanical supplement (often marketed for blood sugar support due to 1-deoxynojirimycin content).
Why it's flagged
- Mild GI effects in supplements (diarrhea, nausea)
- Possible blood sugar lowering
What regulators actually say
"White mulberry leaf is generally associated with few adverse effects in humans. ... FDA has received only two adverse event reports (AERs) associated with white mulberry leaf supplements in its CFSAN Adverse Event Reporting System between January 2004 and March 2022."
Regulatory status
United States — FDA
Food (fruit); leaf extract regulated as dietary supplement under DSHEA (no pre-market approval).
European Union — EFSA
Mulberry leaf extract considered novel food in EU; case-by-case authorization.
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