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.
The temperature of the concrete as placed should be above 40 degrees Fahrenheit using methods described above, however the duration of heating is dependent on the type of service for the concrete, ranging from one day for high-early strength concrete that is not exposed to freeze-thaw events during service to 20 days or more for a concrete element that would carry large loads at an early age.