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.
What we call pH is short for the potential of hydrogen. It is a measure of the acidity or alkalinity of our bodyâs fluids and tissues. It is measured on a scale from 0 to 14. The more acidic a solution is, the lower its pH. The more alkaline, the higher the number is. A pH of 7 is perfectly neutral. The healthiest pH is one that is slightly alkaline. Optimally, we want a pH of 7.365. This number will fluctuate throughout the day, but the normal range is between 6 and 7.5.