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.
Concrete does not dry, it cures. A 28 day cure is generally specified. It is desirable to keep the surface of the concrete wet or damp after it initially sets up and prevent dryout which ends the curing process and limits final strength.