glutathione injection im or subcutaneous Glutathione Injections: Benefits, Dosage, and

The other is a repair-and-regeneration research peptide with compelling animal data, but significant regulatory and sourcing caveats

Additional Ingredients: Adding vitamin C, collagen, or other antioxidants increases cost by 30-50%

Do not shake vials vigorously

Peptide Fundamentals Peptides are short chains of amino acids, more than two but less than fifty, which serve a signaling function in the body and may exert direct regenerative effects on tissues

If needles aren't your thing, B12 supplements are also available in capsule, tablet, and liquid forms, which can often be purchased over-the-counter (via Medical News Today)