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You will just be withdrawing less or more product out of the vial to get the dosage you want

Hum Reprod Update (2019) 25(3):32643

Built for large therapeutic supply

Your skin may appear a bit flushed immediately after the treatment, but any redness should disappear within a few hours, and can be covered with makeup in the intermediary

The discovery of its biological activity came from an unexpected observation: serum from young donors (age 20-25) could stimulate aged liver tissue to synthesize proteins at a rate characteristic of younger tissue, while serum from older donors (age 60-80) could not

On the other hand, the non-tumorigenic, spontaneously immortalized keratinocyte cell line - HaCaT cells can provide almost unlimited supply of identical cells, ensuring high intra- and inter-laboratory reproducibility