ghk-cu peptide dosage recommendations Ghk CU ? : r/Biohackers If you're curious, check the
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Most suppliers won't test for it

It might not be safe for people with: Allergies to vitamin B12 Lebers disease, which affects eyesight Kidney issues Low potassium levels Not having enough other important nutrients like folic acid and iron

Older adults frequently need higher vitamin B12 intake because gastric acid production decreases with age, reducing the release of B12 from food proteins
