does the body produce glutathione Is Master Antioxidant? Here’s What Science Says Your body makes its own

Less common are temporary tingling or, in rare cases, allergic reactions such as rash or swelling

Vitamin A serves essential functions: it supports vision as a key component of rhodopsin, regulates keratinocyte and myeloid cell differentiation, modulates gene expression by binding to nuclear receptors [retinoic acid receptor (RAR) and retinoid X receptor (RXR)], and plays roles in bone development and immune function ( Acute deficiency is rare in Western countries

Optic Neuropathy (Lebers Disease): A rare contraindication, with 1,000 pg/mL in 95% of users showing normal organ function

Overall quality and certainty of evidence was evaluated considering multiple dimensions adapted from GRADE (Grading of Recommendations Assessment, Development and Evaluation) methodology

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