Sangzhi (Mulberry Twig) sāng zhī · 桑枝

Safety. Low risk, and that is worth saying plainly because the rest of this section is not low risk. Two cautions remain. The first is sourcing: a woody twig sold as medicine is not grown to food standards, and mulberry trees are sprayed and grow beside roads, so surface contamination is a real question that no label answers. The second is blood sugar: products from this tree, the leaf more than the twig, have been studied for effects on blood glucose, and anyone on diabetes medicine should treat that as a reason to ask a pharmacist first rather than as a reason to expect an effect. Safety in pregnancy is not established. No amount is given here.