Half caff

Anyone drinking half caff coffee instead of regular? I switched about a year ago. Has about 50 mg caffeine per 8 oz cup. I've heard stuff online about how the chemicals in it are bad? Anyone heard this? Definitely can't give up the coffee! This was my compromise. As an ER nurse in a busy trauma center, caffeine is kind of crucial, especially with how tired I already feel at almost 5 weeks!