此类植物浓缩,提炼,产品,大多无 scientific toxicology studies 证明它们的安全性.
特别是长期使用, 不管你是涂抹在皮肤上, 嚥到肚子里, 吸到肺里,
没有确定的每日使用安全量,
很多这类植物提取物已被动物实验证明有致癌, 致畸胎, 血液病变(白血病,淋巴癌),免疫病变 (红斑狼疮, 肾病). you just have to search FDA website, also reported even at many public domain.
Occasional use is fine, but you use it at your own expense/risk. Do not over indulge yourself with it.