Which is the best tonic?

Excuse me, I'm a bit lost here. I've been hearing a lot about different tonics and their supposed health benefits, but I'm not sure which one to choose. Can you help me out? I'm looking for a tonic that can boost my energy levels, improve my digestion, and maybe even have some immune-boosting properties. Do you have any recommendations? Is there a particular brand or type of tonic that stands out as the best choice? I'd really appreciate your insights and expertise on this matter.