The phrase "decrease levels" means to make something go down or become lower.
Sentences with «decrease levels»
Certain medications may interact with vitamins by decreasing levels in the body. (healthyeating.sfgate.com)
What should really get your attention, though, is that the diet also decreased the level of triglycerides, LDL («bad») cholesterol, and blood glucose. (mediatrendings.com)
Yoga is helpful in decreasing levels of stress, which, in turn, reduces inflammation. (myersdetox.com)