glutathione sunscreen for oily skin Trycone L-Glutathione Gel SPF 60 PA+++ | Vitamin C & Radicare Gold | Ultra Matte Dry Touch | No White Cast | & Combination asiatic acid DR Q Oil-Free Sunscreen Cream

(PubMed) Yes allergic reactions from mild rash/itching to severe anaphylaxis have been reported

Practical expectations should stay realistic

Yes, you can take B12 supplements or a multivitamin that includes B12

Nejabat A, Emamat H, Afrashteh S, Jamshidi A, Jamali Z, Farhadi A, Talkhabi Z, Nabipour I, Larijani B, Spitz J (2024) Association of serum 25-hydroxy vitamin D status with cardiometabolic risk factors and total and regional obesity in southern Iran: evidence from the PoCOsteo study

Balshaw TG et al

Roesel RA, Hommes FA, Samper L: Pyroglutamic aciduria (5-oxoprolinuria) without glutathione synthetase deficiency and with decreased pyroglutamate hydrolase activity