Why isn’t Cod liver oil getting talked about more

I just noticed that i’ve been taking 15 ml instead of the recommended 5ml of cod fish oil, i’ve got a 500ml bottle, my blood tests are great, i’ve been taking it daily for over a year now - note my vitamin D is naturally low, as I live in the Northern hemisphere, i’ll try sharing them when i take my blood results next month, but I generally feel good.

$0.5 per serving btw:

Nutritional value per 15 ml:

Cod-liver oil: 13 800 mg

Omega-3: 3 540 mg

EPA: 1 110 mg

DHA: 1 680 mg

Vitamin A: 750 µg (97 % RI)

Vitamin D: 30 µg (600 % RI)

Vitamin E: 9 mg (75 % RI)