TB-500 Dosing: 1,250 mcg (50 units) twice weekly (Weeks 14), then once weekly (Weeks 512)
A 2.4 mcg of B12 is the recommended daily dosage for adults
More recent genome-wide analyses by Pickart and Margolina (2018) identified GHK-Cu as upregulating 84 genes while downregulating 27 genes associated with aging-related decline
The first 8 weeks were great
many are marketed under familiar drug names but sold as "research-grade" products meant for laboratory use, not human treatment, and their ingredients, strength, and sterility can vary or be contaminated and mislabeled (goodrx.com)
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