Does yoga with meditation reduce DNA damage?
There are early positive indications that yoga with meditation reduces DNA damage, but the evidence is still too limited for firm conclusions. If you want to live more healthily, yoga is a safe addition, but do not count on it as proven protection for your DNA.
After 10 weeks of yoga, oxidative DNA damage fell significantly in people with type 2 diabetes compared with a control group doing regular exercise. The damage index dropped by nearly 60 points, and a protein that repairs DNA damage also became more active. This is the most reliable evidence we have, although it involves a small group and a specific disease population.
In healthy adults, a 12-week study also found a significant reduction in a well-known oxidative DNA damage marker (8-OH2dG) in the blood, along with fewer free radicals and improved antioxidant capacity. That study had no control group, however, which means you cannot rule out the possibility that the improvement would have occurred on its own or was driven by awareness of participation.
Two small studies involving male partners in couples experiencing fertility problems found, after 21 days and 6 weeks of yoga respectively, reduced oxidative DNA damage in sperm and even longer telomeres in sperm cells. Both studies also lacked a control group, so spontaneous recovery or chance cannot be excluded.
A notable nuance: in the randomised diabetes study, overall antioxidant capacity did not improve significantly, even though DNA damage itself did decrease. The effect of yoga on broader antioxidant status is therefore not automatically demonstrated. The effect appears more specific than is sometimes suggested.
A case report on a single individual and a theoretical article add little of substance. A large randomised study in heart failure patients is also under way, but has not yet published any results.
This answer rests on one randomised study (people with type 2 diabetes, small group), one clinical study without a control group in healthy adults, two small prospective studies without a control group in men with fertility problems, one case report of a single individual, a theoretical review article, and a published study protocol without results. The researchers themselves point to the absence of control groups and small sample sizes as the main limitations. Cause and effect can only be inferred from the randomised diabetes study, and that group is specific and limited in size.