Platycodon grandiflorus extract has the effect of resisting skin photoaging. It can protect skin keratinocytes from UV-A damage. At the same time, the extract can improve cell activity, inhibit reactive oxygen species after ultraviolet radiation; reduce the destructive collagenase and inflammatory cytokines IL-1β and IL-6, and protect collagen.

platycodon grandiflorum extract helps to improve allergic skin, such as atopic dermatitis. It can reduce the extent of skin lesions, immunoglobulin IgE levels, abnormal skin thickening and dermal inflammatory cell infiltration. In addition, it balances the Th1/Th2 ratio by inhibiting the T(H)2 cell response and increasing the T(H)1 cell response.

Platycodon grandiflorum root extract inhibits the synthesis of melanin caused by UV-B, and reduces spots and pigmentation caused by ultraviolet radiation. This shows that if the platycodon extract is added to skin care products, it can solve the problems related to pigmentation, and it is a promising raw material for whitening products.