Many people who use creatine gain weight. This is because creatine causes the muscles to hold water, not because it actually builds muscle. There is some concern that combining creatine with caffeine and the herb ephedra (also called Ma Huang) might increase the chance of having serious side effects such as stroke.
Concrete retained in forms or covered with insulation seldom loses enough moisture at 40 to 55 degrees Fahrenheit) to impair curing. However, drying from low wintertime humidities and heaters used in enclosures is a concern.
At an age of 1 day the 120Â°F concrete was strongest and the 25Â°F concrete was weakest. By 7 days the high-temperature cured concretes had no more strength than the 73Â° concrete or even less. By the age of 28 days the high-temperature concretes were weaker than the 73Â° concrete. From 28 days to 1 year the 55Â° concrete was considerably stronger than the 73Â° concrete. From 90 days onward the 40Â° concrete was stronger than the 73Â° concrete and the 25Â° concrete was slightly stronger than the 73Â° concrete. All of this suggests that, provided there is continuous curing, concrete cured at about 55Â° for the first 28 days ultimately reaches the highest strength.