Nicotine presence can be detected in the blood for a short period only (about 48 hours) . However, its metabolite, cotinine, can be detected up to about three weeks from the last use and the cut-off detection levels is 200 ng/ml.
Q: What is the purpose of toner? Our skin is happiest at a pH of 5.5. Toner balances the pH of your skin. If you are acne prone the skin is too acidic. So finding a slightly alkaline toner can help balance the acidic nature. If the skin is dry, it is too alkaline, so finding a toner that has a lower pH can bring it to a happy balance of 5.5. Toning 1 minute after cleansing allows all the beneficial molecules to absorb into the skin as it is still wet.
Most of NeoStrata products are safe to use while you are pregnant or nursing. The use of glycolic acid with levels up to 10% on a daily basis during pregnancy or nursing is considered to be very safe by the medical community.However, during this time, your body is going through significant changes and your skin may be more sensitive to glycolic acid. toner is a cosmetic step that is used for two reasons: 1  To normalize the skin s pH, if you have used a cleanser whose pH is Alkaline. 2  If you have used a tissue-off cleanser to remove makeup and are concerned that extra residue may be left behind.