In gum disease, the gums become infected and inflamed. Doctors in one study thought the anti-inflammatory properties of omega-3s might reduce the likelihood of gum disease. Researchers measured the diets of 9,182 men and women, aged at least 20, who had been given a dental exam. Those who consumed the most DHA (docosahexaenoic acid) were 20 percent less likely to have gum disease compared to those who got the least DHA. Results were similar but slightly less for EPA (eicosapentaenoic acid).
Some people inherit the tendency to have both high cholesterol and high triglycerides. In one study, 67 people with this inherited condition took omega-3s or a placebo. After 12 weeks, LDL cholesterol had not changed in either group, but compared to placebo, those who had taken omega-3 had 7 percent lower blood pressure, 8 percent lower levels of a sign of inflammation (high-sensitivity C-reactive protein) and 19 percent lower levels of triglycerides.