Dr Lynch states that, in general, the nutrient SOD is known to support reduction in superoxide in the body. Superoxide is metabolized (broken down) by all three forms of SOD - SOD1, SOD2 and SOD3. SOD supplementation would support SOD genes of all forms as it supports the reduction of the superoxide concentration thereby supporting the workload on the superoxide dismutase genes. SOD isoforms simply identify where the SOD gene is functioning and what cofactor it uses.*
Please note that Seeking Health SOD product does not have clinical testing to to claim evidence of supporting these genes or biochemical processes.
You may learn more about the forms of SOD here
*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.