Benefits of Stop Smoking what happens to your body if you stop smoking right now, Read after the break....... Within ... # 20 minutes - Your blood pressure, pulse rate, and the temperature of your hands and feet will all return to normal. # 8 hours - Remaining nicotine in your bloodstream will have fallen to 6.25% of normal peak daily levels, a 93.25% reduction. # 12 hours - Your blood oxygen level will have increased to normal and carbon monoxide levels will have dropped to normal. # 24 hours - Anxieties peak and within two weeks should return to near pre-cessation levels. # 48 hours - Damaged nerve endings have started to regrow and your sense of smell and taste are beginning to return to normal. Cessation anger and irritability peaks. # 72 hours - Your entire body will test 100% nicotine-free and over 90% of all nicotine metabolites (the chemicals it breaks down into) will now have passed from your body via your urine. Symptoms of chemical withdrawal have pea...