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 ranges from 0 - 14 with 0 being the most acidic, 14 being the most basic (or base/alkaline) and 7 being neutral (like water). This means that something with a pH â¦of 3 would be a strong acid and would be about 10,000 times more acidic than water which would be close to soda or grapefruit juice.