For the first part, just look at the expiration date on the bottle. If you dont have the bottle, then go by when you purchased them. Most of the time, you are good a year unopened, and then less for others.
On your second deal.... This topic has been beaten to death many many months ago about how much to take. We all had our opinion, and my opinion was you dont need that much. Others swore to take it, quoted Charles Poliquin and what not, but I still said you dont need that much. I respect Charles and many things he says, but seeing how I totally corrected one of his statements on Antioxidants, he is not a fan of mine when it comes to supplements.
Aside from that, you have to look at the SOURCE of the fish oil. People's main reason for fish oil is the content of EPA/DHA. Not every fish is the same, so saying I take 10g of fish oil means absolutely nothing in regards to the amount of EPA/DHA
I'll personally do about 2g/day. At max I would do 4.6g which is about 1tsp if you do something like carlson's liquid from Cod.
At that dose above, and the combo of EPA/DHA, you would get 1g (again combined) which would be about equivalent to the research I listed in bold. And that is with patients WITH CORONARY ARTERY DISEASE. With half a tsp, you'd get what is shown for healthy people without the disease.
The research is still slim on large doses. The recent one with 6g was
Br J Nutr. 2008 Mar 13;:1-7 [Epub ahead of print]
Docosahexaenoic acid-rich fish oil improves heart rate variability and heart rate responses to exercise in overweight adults.
Mayo Clin Proc. 2008 Mar;83(3):324-32.
Omega3 Fatty acids for cardioprotection.
Lee JH, O'Keefe JH, Lavie CJ, Marchioli R, Harris WS.
Address correspondence to James H. O'Keefe, MD, 4330 Wornall Rd, Ste 2000, Kansas City, MO 64111 (
[email protected]).
The most compelling evidence for the cardiovascular benefit provided by omega-3 fatty acids comes from 3 large controlled trials of 32,000 participants randomized to receive omega-3 fatty acid supplements containing docosahexaenoic acid (DHA) and eicosapentaenoic acid (EPA) or to act as controls. These trials showed reductions in cardiovascular events of 19% to 45%. These findings suggest that intake of omega-3 fatty acids, whether from dietary sources or fish oil supplements, should be increased, especially in those with or at risk for coronary artery disease. Patients should consume both DHA and EPA.
The target DHA and EPA consumption levels are about 1 g/d for those with known coronary artery disease and at least 500 mg/d for those without disease. Patients with hypertriglyceridemia benefit from treatment with 3 to 4 g/d of DHA and EPA, a dosage that lowers triglyceride levels by 20% to 50%. Although 2 meals of oily fish per week can provide 400 to 500 mg/d of DHA and EPA, secondary prevention patients and those with hypertriglyceridemia must use fish oil supplements if they are to reach 1 g/d and 3 to 4 g/d of DHA and EPA, respectively. Combination therapy with omega-3 fatty acids and a statin is a safe and effective way to improve lipid levels and cardiovascular prognosis beyond the benefits provided by statin therapy alone. Blood DHA and EPA levels could one day be used to identify patients with deficient levels and to individualize therapeutic recommendations.
So since this topic was murdered before, YOU are going to have to make the decision since everyone is all over the board on this topic. Dont forget to look at what you eat too. I eat fish 2-3x per week, so this is why you wont see my levels in the form of supplements any higher