Since the decomposition products of PHA have no toxic and side effects, the related products can be used in the field of beauty and cosmetics. On the one hand, for example, in the field of regenerative medicine and aesthetics, fillers (PLLA, etc.) are used to stimulate or induce the body's own tissues to regenerate fibroblasts and collagen after being injected into the subcutaneous tissue to achieve therapeutic effects. With PHA, microsphere products suitable for this field can be produced. On the other hand, relying on the super factory of cell, we can also produce ectoine products, which are often used for high-end skin care products.