What is the research behind antioxidant need?

At DNAfit, we have a strict inclusion protocol to evaluate whether a gene will be included in our reports. Each gene must have a minimum of 3-peer reviewed studies in humans demonstrating the effect, there must be a consensus on that effect, and that effect must be modifiable through an environmental and lifestyle change. 

Below is a sample of our evidence base for antioxidant need:

Manganese superoxide dismutase polymorphism, prediagnostic antioxidant status, and risk of clinical significant prostate cancer 

Genotype-activity relationship for Mn-superoxide dismutase, glutathione peroxidase 1 and catalase in humans 

Association between GPx1 Pro198Leu polymorphism, GPx1 Activity and plasma selenium concentration in humans