Thats because most skincare products work only on the surface, while your skin concerns like pigmentation, dullness, and uneven skin tone often begin much deeper, at a cellular level
From the standpoint of a manufacturing peer, I see this as a practical advantage
Bulley SM, Cooney JM, Laing W (2021) Elevating ascorbate in Arabidopsis stimulates the production of abscisic acid, phaseic acid, and to a lesser extent auxin (IAA) and jasmonates, resulting in increased expression of DHAR1 and multiple transcription factors associated with abiotic stress tolerance
It downregulates NLRP3 inflammasome activity, suppresses the TLR4/NF-B axis, and activates the Nrf2/HO-1 signaling cascade, offering neuroprotection and reducing inflammation in various animal models (Althagafy et al
Roles of glutathione in mediating abscisic acid signaling and its regulation of seed dormancy and drought tolerance