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Because the peptide occurs naturally in human plasma (at roughly 200 ng/mL in young adults, declining to approximately 80 ng/mL by age 60), topical supplementation essentially restores youthful local concentrations in treated skin
It is also involved in synthesis of several neural transmitters (12)
Long-lasting effects One injection lasts 4-6 weeks, so patients only need injections every month or two for maintenance
It helps mood and sleep patterns by helping the body produce serotonin, melatonin, and norepinephrine, a stress hormone
Certain medications may also interfere with absorption and cause deficiency, in particular, medicines prescribed for heartburn, antibiotics, blood pressure medicine, cholesterol-lowering drugs, diabetes medications and antipsychotic drugs
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