There are several key factors you should consider. First, the EPA and DHA content, these are the beneficial omega-3 fats. High amounts are essential for maximum benefits. Secondly, check whether it's certified for purity and potency, ensuring no harmful contaminants are present. Lastly, pay attention to the form of fish oil. Natural triglyceride (TG) is more readily absorbed than ethyl ester (EE). Can you tell me a bit about your dietary habits and health goals?