Deism is the belief in a creator, who made the world but does not take a personal interest in it -- doesn't require worship, answer prayers, judge behavior, or necessarily promise a life after death (unless that was part of the original creation).
Herbal supplements are a type of dietary supplement that contain herbs, either singly or in mixtures. An herb (also called a botanical) is a plant or plant part used for its scent, flavor, and/or therapeutic properties.
Anything strong enough to produce a positive effect, such as lowered cholesterol or improved mood, is also strong enough to carry risk. So it's important to do your homework and investigate potential benefits and side effects of herbal supplements before you buy. And be sure to talk with your doctor, especially if you take medications, have chronic health problems, or are pregnant or breast-feeding.