Breastfeeding mothers also need supplementation, since they need increased amounts of essential nutrients that depletes during the process of breastfeeding. Among those are vitamins B6, C and D, as well as calcium, zinc, magnesium and potassium.
Even vegetarians are not exempt from the need to take in supplements, since they do not get all the essential nutrients only from vegetables, especially for growing vegan children who need to have the nutrients provided by dairy products, meat, poultry and fish.
Also those above the age of 50 have special needs for some nutrients that they need more of and some that they need less. Seniors need to have more vitamins B6, B12 and D, as well as folate. Postmenopausal women also need the supplement their calcium intake to lessen the risk of osteoporosis.
Alternative fish oil supplementation is a must to ensure a balanced and healthy lifestyle, but don't be fooled by mass media advertising campaigns or too-good-to-true offers, since not all those supplements found in the market are what it seems to declare or state.
Be cautious. It does not mean that because it is cheaper than others you get good value for your money. It is best to investigate first.
Also try to seek advice from a nutritionist, dietitian or your physician as to what your body needs and does not need to have, since they may be able to help you establish what you need supplemented or fortified.
The benefits of fish oil supplements is indeed good for the body, but take note that anything good taken in excess can end up to negative results.