Fish Oil For Babies: Safety, Health Benefits and Side Effects

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Fish oil for babies could be an effective way to supplement omega-3 fatty acids in their diet. Fish is one of the richest sources of omega-3 fatty acids. Generally, babies can eat fish as soon as they start eating solids. However, if they can’t eat it for some reason, you may consider giving them fish oil instead.

Read on to know more about the safety of fish oil for babies, the right age when babies can eat fish, its possible health benefits, and side effects.

Is Fish Oil Safe For Babies?

The US Food and Drug Administration (FDA) has marked fish oil “generally recognized as safe (GRAS)” food (1). The safe intake limit is three grams a day for adults. In general, babies under the age of one year need 0.5 grams of omega-3 fatty acids a day (2).

Consult a pediatrician/dietitian to determine the safe intake limit for infants.

When Can Babies Have Fish Oil?

According to the American Academy of Pediatrics (AAP), within a few months of starting solids, an infant’s daily diet should include a variety of foods, including fish (3). However, it is not known if the rule applies to fish oil as well. If your baby consumes fish regularly and it suits him/her, then fish oil also might go well with the baby. Moderate consumption of fish on a regular basis should be able to meet your baby’s nutritional needs of omega-3 fatty acids. But if you want to introduce fish oil, do consult a pediatrician.

What Are The Health Benefits of Fish Oil For Babies?

Fish oil is obtained from the tissues of the oily fish. An example of fish oil is cod liver oil, which is extracted from the liver of the cod, an oily fish.  The oil is an excellent source of omega-3 fatty acids, such as EPA (eicosapentaenoic acid) and DHA (docosahexaenoic acid), which cannot be synthesized by the body (4).  Below are some of the benefits of fish oil.

  1. Brain growth and cognitive development: Omega-3 fatty acids, such as EPA and DHA, are required for proper brain growth and cognitive development in infants (5). DHA deficiency, in specific, is associated with poor cognitive development leading to learning difficulties(6). Therefore, supplementing your baby’s diet with fish oil, after doctor consultation, might help.
  1. Eye development: Various research studies have shown that omega-3 fatty acids, such as DHA, may be beneficial in aiding optimum development of vision (7). Besides, DHA may help in preserving vision and fight chronic inflammation of the eyelids, in the long run (8).
  1. Heart health: Regular consumption of fish oils may have heart-protective effects. The omega-3 can possibly lower blood pressure and improve the health of the blood vessels (9). Besides, the fatty acids are also known to reduce triglycerides and slow down the plaque build-up (10) (11). These benefits can be relevant to the baby in the long run.
  1. Immunity: The DHA is found to have immunity-enhancing properties (12). Omega-3 fatty acids also display anti-inflammatory effects that play a vital role in enhancing immunity (13)(14).
  1. Bone health: Some studies show that regular consumption of fish oil might have bone protective effects (15), and fish oil supplements can help reduce joint pain and stiffness (16). However, more clinical trials are needed to establish the exact mechanism. Fish oil also contains vitamin D that helps maintain bone health.
  1. Skincare: The use of fish oil has shown beneficial effects on the development of the cutaneous system. It is reported that fish oil could possibly reduce the severity of some skin conditions, such as eczema and dermatitis (17). These benefits are attributed to the omega-3 and omega-6 PUFAs present in it.
  1. Overall health: Besides omega-3 fatty acids, fish oil contains other micronutrients such as iodine, selenium, vitamins A and D, and bioactive compounds. These compounds help maintain health and well-being on regular consumption.

All the benefits of fish oil confer when it is a part of a well-balanced diet for the baby. But just like any other food item, fish oils have their share of side-effects too.

Possible Side Effects Of Fish Oil In Babies

The following are some of the likely side effects of fish oil.

  1. General discomfort: Fish oil has some general side effects like causing unpleasant taste in the mouth, bad breath, foul-smelling sweat, and headache (18). These side-effects are mild and may or may not happen to all the babies. Some babies might also experience gastrointestinal issues such as heartburn, nausea, and diarrhea.
  1. Possible drug interaction: Fish oil can have some possible drug interactions. Therefore, if your baby is on medications, then make sure to discuss with the pediatrician the safety of fish oil (19).
  1. Harmful ingredients: Some fish oil supplements might contain added substances that may not suit babies. Therefore, selecting a fish oil supplement must be done in consultation with a pediatrician.
  1. Allergy: An infant who is allergic to seafood might be allergic to fish too. Some basic symptoms of fish allergy are headache, nausea, stomach cramps, indigestion, stuffy or runny nose, and anaphylaxis (20). If your baby has a seafood allergy or any other existing allergies, then consult a pediatrician before giving fish oil or fish oil supplement.
  1. Overdose: High dosage of fish oil supplementation is associated with decreased immunity, increased anti-coagulation, and toxicity.

If your baby shows any unusual symptoms after consuming a fish oil supplement, then stop its use and seek prompt medical attention.

When To Avoid Fish Oil For Infants?

Avoid fish oil if the baby.

  1. Has a medical condition, especially a blood disorder.
  2. Is allergic to fish or seafood.
  3. Is on antiplatelet medicines or other medications that may be less effective in the presence of fish oil

Consult a pediatrician since there might be exceptions where the baby might be able to have fish oil safely.

How To Make Your Baby Consume Fish Oil?

It may not be easy to introduce fish oil to babies since they could dislike the taste. The following are some tips to introduce fish oil to a baby.

  1. Try offering flavored fish oil. The flavor could help mask the fish smell.
  2. You can mix the flavored fish oil to applesauce or any of your baby’s favorite treats. Add fish oil to a bottle of milk, soft porridge, smoothie, or yogurt.
  3. Sprinkle fish oil over pureed veggies.
  4. Once your baby starts to chew, you can opt for chewable fish oil supplements.

Fish oils for babies are rich in omega-3 fatty acids that boost the brain, eye, and general health. After a few months of a solid diet, you may add fish oils or fish serving to a baby’s diet. You may ask a pediatrician for more personalized information to avoid overdosing. However, you must ensure that your baby is not allergic to fish oil. It is also important to buy fish oil from trusted sources and store it safely to avoid contamination with other ingredients. Fish oils are contraindicated in babies with blood disorders and taking blood-thinning medications.

Frequently Asked Questions

1. Is omega-3 the same as fish oil?

No. Fish oil is one of the richest sources of omega-3 fatty acids. Therefore, omega-3 fatty acids are often referred to as “fish oil” (21).

2. Can a child have too much omega-3?

If not prescribed by a doctor, taking too many omega-3 fatty acids supplements can be harmful, causing gastrointestinal symptoms and an increased risk of bleeding. Additionally, consuming too much fish oil may increase the risk of ingesting too much mercury (22).

3. Do babies get omega-3 from breast milk?

Yes. Breast milk contains docosahexaenoic acid (DHA), an omega-3 fatty acid, which is important for better vision and brain development in babies (23).


MomJunction's articles are written after analyzing the research works of expert authors and institutions. Our references consist of resources established by authorities in their respective fields. You can learn more about the authenticity of the information we present in our editorial policy.
1. Marine Oils; Drugs and Lactation Database; National Center For Biotechnology Information
2. Do Kids Need Omega 3 Fats; Eat Right; American Academy of Nutrition and Dietetics
3. Starting Solid Foods; Healthy Children; American Academy Of Pediatrics
4. Fish oil: friend or foe?; Harvard Health Publishing
5. Omega-3 Fatty Acids; U.S Department of Health and Human Services
6. Health Benefits of Docosahexaenoic Acid (DHA); U.S National Library of Medicine
7. Effects of Omega-3 Fatty Acids on Eye Health: Summary; National Center For Biotechnology Information
8. Omega-3 for your eyes; Harvard Health Publishing
9. Omega-3-rich foods: Good for your heart; Harvard Health Publishing
10. Omega-3 fats – Good for your heart; Medline Plus; U.S National Library of Medicine
11. The Truth About Fish Oil, Omega-3 Fatty Acids, and Heart Health; Penn Medicine
12. Nothing fishy about it: Fish oil can boost the immune system; Science Daily
13. Janice K. Kiecolt-Glaser et al.; Omega-3 Fatty Acids and Stress-Induced Immune Dysregulation: Implications for Wound Healing; National Center For Biotechnology Information
14. Fish Oil May Improve Immunity; Michigan State University
15. NASA studies find omega-3 may help reduce bone loss; Science Daily
16. Omega-3 fatty acids are important for your health; International Osteoporosis Foundation
17. Tse-Hung Huang et al.; Cosmetic and Therapeutic Applications of Fish Oil’s Fatty Acids on the Skin; National Center For Biotechnology Information
18. Omega-3 Supplements: In Depth; National Center for Complementary and Integrative Health; U.S Department of Health and Human Services
19. Should you consider taking a fish oil supplement?; Harvard Health Publishing
20. Fish Allergy; American College of Allergy, Asthma & Immunology
21. Understanding Omega-3 Fatty Acids or “Fish Oil; Texas Heart Institute
22. What are Omega-3 Fatty Acids; Academy of Nutrition and Dietetics
23. Brian A. Juber et alBreast milk DHA levels may increase after informing women: a community-based cohort study from South Dakota USA; NCBI
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Moloko Mehlape

(MSc Dietetics)
Moloko Mehlape is a registered dietitian in private practice with special interest in nutrition education, sports nutrition, weight and chronic disease management. She is a philanthropist passionate about making a positive impact in public health through nutrition. Dt. Mehlape has completed extensive formal education and training, and holds qualifications BSc Dietetics (Hons) - Medunsa, MSc Dietetics from the University of... more

Swati Patwal

Swati Patwal is a clinical nutritionist and toddler mom with over eight years of experience in diverse fields of nutrition. She started her career as a CSR project coordinator for a healthy eating and active lifestyle project catering to school children. Then she worked as a nutrition faculty and clinical nutrition coach in different organizations. Her interest in scientific writing... more