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Allowing for proper drying time of course

Check pH:Test your serum's pH with strips or a meter. Aim for 4.55.5. If it's too alkaline, add a tiny amount of citric acid dissolved in a few drops of water. If too acidic, add a minimal amount of sodium hydroxide solution. Retest after each adjustment

Nazarian is the doctor to see

Treatment should be personalized and closely monitored by a medical provider

doi:10.1016/j.mad.2003.11.005 Huff T, Mller CS, Otto AM, Netzker R, Hannappel E

You can find them in the supplement or vitamin section , usually in powder or capsule form