caffeine intake promotes increased use of other stimulants such as alcohol, nicotine, and other stimulants, which are known to impair sleep. Therefore, it’s best to avoid these products to improve your overall health and sleep quality.
Caffeine is an ingredient in many pre-workout formulas. Although it is legal and can help people feel more alert, it also has adverse side effects. Studies show that it slows down the metabolism, which leads to trouble sleeping.
The reason that your body builds up a tolerance for caffeine over time is that you need to block more adenosine receptors to get the same effect. This means that once you stop using a pre-workout, you will experience pre-workout withdrawal symptoms.