Butylated hydroxytoluene (BHT), also known as dibutylhydroxytoluene, is a lipophilic organic compound, chemically a derivative of phenol, that is useful for its antioxidant properties. European and U.S. regulations allow small amounts to be used as a food additive.
Like others have said, it depends... If you're doing sets of 8-12 reps with moderate weights, rest 60-90 seconds. if you're doing high weight low rep (3-5 reps), then rest 2 minutes And if you're doing real heavy stuff like squats, deadlifts, I'd recommend at least 3 minutes.
They have a very basic formula for how long to wait between your sets based on how many reps youâre doing for the exercise: 1  1-3 Reps: Rest for 3 to 5 minutes. 2  4-7 Reps: Rest for 2 to 3 minutes. 3  8-12 Reps: Rest for 1 to 2 minutes.  13 Reps+: Rest for 1 minute or less.