医学美容保养品（cosmeceutical）是指介于化妆品（cosmetic）、美容品与药品（pharmaceutical）之间，能够调整肤况却不会改变生理结构的产品，由于有临床实验数据与医学期刊发表论文作为研发基础，因此制作出来的产品能得到医生的信赖。

以往的购买推销方式都得经过专业医疗人员把关，在诊所、药局才买得到，随着今日消费型态的转变与医生对保养品的定义调整，在诊所、药妆店等买到的医疗通路保养品已出现灰色地带，主因来自于「汉方理疗」概念的加入，因此不只是有医药、生化科技等成分的保养品，复合植物萃取的保养品也逐渐受到医学界认可。

Cosmeceuticals refers to the combination of cosmetics and pharmaceuticals. Cosmeceuticals are cosmetic products with biologically active ingredients purporting to have medical or drug-like benefits.

Dermatological research suggests that the bioactive ingredients used in cosmeceuticals have benefits beyond the traditional moisturizer (e.g., Chen et al., 2005; Zettersten, Ghadially, Feingold, Crumrine, & Elias, 1997). However, despite reports of benefits from some cosmeceutical products, there are no requirements to prove that these products live up to their claims.