Health authorities have confirmed that there are no undesired effects of moderate caffeine consumption.
Many authorities around the world have looked at the effects of caffeine. For example, Health Canada scientists conducted an extensive review of the scientific literature on caffeine (Nawrot et al., 2003). Based on this review, they concluded that the general population of healthy adults is not at risk for potential adverse effects from caffeine if they limit their consumption to 400 mg per day. This is in line with similar findings from the European Food Safety Authority (EFSA) in 2015. However, pregnant and breast-feeding women should limit their caffeine intake to 200 mg.
Health authorities across the world, including the European Food Safety Authority, have concluded that Red Bull Energy Drink is safe to consume, which is why it is available in more than 171 countries including every state of the European Union.