While this may provide localized antioxidant support, glutathione is a large molecule that does not easily penetrate the deeper layers of the skin where melanin is produced
[DOI] [PubMed] [Google Scholar] 41.Lee S., Lee J., Lee H., Sung J
Astragalus polysaccharide: implication for intestinal barrier, anti-inflammation, and animal production
Inadequate secretion of intrinsic factor, resulting from lesions that destroy the gastric mucosa (which can be caused by ingestion of corrosives, extensive tumors, and conditions associated with gastric atrophy, such as multiple sclerosis, certain endocrine disorders, iron deficiency, and subtotal gastrectomy) Structural lesions leading to vitamin B 12 deficiency, including regional ileitis, ileal reactions, and malignancies Competition for vitamin B 12 by intestinal parasites or bacteria