is 500 mg glutathione enough for skin whitening Topical vs Oral Glutathione: Which Better Skin? Glutathione for Skin Lightening :

Sublingual tablets and nasal sprays bypass some of the digestive steps, which may be helpful if you have absorption challenges or prefer not to swallow pills. Vitamin B12 injections deliver the vitamin directly into your bloodstream, bypassing the digestive tract and providing faster, more reliable absorption

Please note that the FDA has not approved Glutathione for skin whitening purposes, and this is an off-label use but a common dermatology practice

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The RDA for vitamin B12 is 2.4 mcg per day

Always inform your healthcare provider about all medications and supplements you are taking, as some drugs can contribute to constipation

Regulates Immune Function Helps maintain the balance of white blood cells and cytokines