Base is used broadly in both literal and figurative contexts: the wide base of the pyramid; a party seeking to expand its power base. Basis is used in a nonphysical sense: Healthy scepticism is the basis of all accurate observation (Arthur Conan Doyle).
Omega-3 fats also lower blood pressure and heart rate, improve blood vessel function, and, at higher doses, lower triglycerides and may ease inflammation, which plays a role in the development of atherosclerosis. Several large trials have evaluated the effect of fish or fish oils on heart disease.
Omega-6 fatty acids compete with omega-3 fatty acids in your body, so eating too many omega-6 fatty acids can cause a silent inflammation that you can't feel. This chronic inflammation can cause cardiovascular disease, cancer, and inflammatory and autoimmune diseases, including diabetes.