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.
The pH scale goes from 0-14 (with acidic substances falling below 7 and basic substances falling above 7). Normal levels for body fluid pH hover right in the middle of that range. Foods can either raise or lower your pH level, and this is based on the mineral content of the food â not the actual pH of the food itself. Lemon juice, for example, has a low pH, but has an alkalizing effect on the body when consumed.