Between the available options for using GHK, injection vs topical, topical applications are more common in professional skincare and hair products, and there are decades of research supporting their potential benefits for the appearance of skin firmness and texture
Subcutaneous injection can be administered systemically (abdomen, thigh) or locally (scalp)
Our pharmacists can assess you here at the pharmacy, and you might be able to get your injection on the same day
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1 mg is equal to 1000 mcg
This question comes up quite often and I'd be very interested in seeing how the labs determine their "use by" dates for products: what it is based on and what breakdown rates B12 displays