this would vary depending on indvidual eating parameters, but generally speaking i recommend that approximately 70-75% of total caloric fat should come from mono and poly.
General recommendation is usually 2:1 omega 6s to omega 3's, although in America the rate is usually something like 10:1. For health puposes it is important to receive an optimal balance between the two. The benefits of omega 3s (particularly fish oils-DHA,EPA) cannot be emphasized enough. Just a few benefits include anti-cancer properties, endothulium health, brain health , insulin sensitivity etc... It would take an entire book to decribe all the benefits. DHA (docosahexaenoic) EPA (eicosapentanoic) can be derived from Alpha-Linolenic acid available in walnuts, flax oil, and canola oil the conversion rate is not real efficient, so i would recommend in consuming the oils directly. Recent research has also indicated that consumption of Omega 3s can help with preventing ADHD in early childhood. Actually an excellent article in this months Lifeextension magazine.
I generally recommed 6 capsules per day appoximatley 1080mgs of epa, and 720mgs of dha (diabetics usually slightly higher). These numbers vary.
I also like to include extra virgin olive oil for the monounsaturated fats as well as the anti-oxidants it contains. Also good quality calorie additive.
A study recently conducted in Brazil showed fish oil combined with olive oil to have a synergist effect on treating rheumatoid arthritis.
thanks
Coach Hale