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Types of B12: The most common forms are cyanocobalamin (a stable, synthetic form) and methylcobalamin (an active form)
Cautions: Federal law restricts this drug to use by or on the order of a licensed veterinarian
It also supports the nervous system and helps make DNA, which is important for cell function and repair
Side Effects and the Copper Uglies Explained GHK-Cu has a strong safety profile in topical research, but a small subset of users experience a transient phase known as the copper uglies. A 2023 clinical safety review covering 12 studies and 512 participants reported that the most common side effects of topical GHK-Cu were transient and mild
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