Type 2 diabetes protection (PPARG Pro12Ala)

PPARG helps fat cells respond to insulin. A common variant (called Ala12) slightly improves insulin sensitivity and lowers type 2 diabetes risk. The effect is small but has been replicated many times.

Possible results

Typical PPARG type. You have the common version of PPARG, so as far as this gene goes, your insulin sensitivity and type 2 diabetes risk are at the typical baseline. Weight, diet and activity are the biggest levers either way.

Slightly lower diabetes risk. You carry one copy of the protective PPARG (Ala12) variant, which slightly improves how your fat cells respond to insulin and modestly lowers type 2 diabetes risk. It's a small genetic plus, and lifestyle still matters far more.

Lower diabetes risk (PPARG). You have two copies of the protective PPARG (Ala12) variant, linked to better insulin sensitivity and somewhat lower type 2 diabetes risk. The effect is small but favorable, and a healthy weight and diet still do the heavy lifting.

Evidence & sources

This variant appears in 16 published genetic studies: PubMed 17463246 · PubMed 17463248 · PubMed 17463249 · PubMed 22581228 · PubMed 22885922 · PubMed 24509480 · PubMed 25625282 · PubMed 28869590 · PubMed 29632382 · PubMed 33893285 · PubMed 35393509 · PubMed 36269708 · PubMed 38278947 · PubMed 38627641 · PubMed 39280063 · PubMed 39379762.

Related

Age-related macular degeneration risk · Asthma · Autoimmune risk (PTPN22 R620W) · Coronary artery disease · Factor V Leiden thrombophilia · Longevity-associated variant (FOXO3) · Type 2 diabetes risk