Out of the hundreds of supplements one can take, fish oil is in my top 5 of the most important, perhaps second only to vitamin D.
I have tried both capsules and Moller's bottle, with the latter being my preference if I can find it at a good price and potency, I switch to capsules and other brands.
The benefits are numerous and definitely go beyond cholesterol and triglycerides, but we won't discuss them here. Many people seek "mental stimulation," clarity, and related effects in various formulations with exotic herbs, adaptogens, and vitamins. It is much more certain that they will find it in humble fish oil - DHA, one of the two omega-3 fatty acids, is a balm for our brain.
The general idea with omega-3 is that the more of our body's cellular fat content consists of omega-3 polyunsaturated fats (as opposed to, let's say, "bad" saturated fats), the more capable they are of deactivating various inflammatory processes. Of course, this process does not happen overnight - that's why the benefits build up over weeks and months.
(Extra virgin olive oil is part of the same process - mainly containing omega-9 monounsaturated fats - as well as all the other healthy foods we know, nuts, avocado. We help build this resilient profile.)
Here we have omega-3 with a content of approximately 150mg EPA and 125mg DHA per capsule, a small-medium-common dosage for fish oils. That's why our company recommends taking 2 capsules per day. And taking four won't harm you, it's equivalent to a serving of fish, let's say, roughly as much omega-3 as 3-4 capsules. This is just to give you an idea of the quantities, but if you are taking any anticoagulant or other medication, consult your doctor.
It is a blend of fish oil and cod liver oil, so it also contains some amounts of vitamin A and D. This doesn't concern us. Vitamin D3 is very important and it's good to supplement it on its own in higher doses. The cod liver oil gives us a small amount.
Furthermore, Mollers is one of the very good brands and due to its Scandinavian origin, we have (theoretically) more assurances that it is controlled and free from heavy metals.
Capsules or bottle? I prefer the bottle for its higher DHA content it provides. There, 5ml (a teaspoon) gives us 370mg EPA and 560mg DHA, although personally, I take a tablespoon (with breaks for a few months). The bottle is good, but as soon as you open it, it starts to oxidize, and this happens every time you open it. That's why it needs to be consumed within a month, so if you plan to forget it in the fridge, leave it. With capsules, you don't have this issue.