9 Reasons Cod Liver Oil Might Be the Super Supplement You’re Missing

9 Reasons Cod Liver Oil Might Be the Super Supplement You’re Missing

Cod liver oil has been around for centuries — and for good reason. Packed with healthy fats, vitamins, and antioxidants, this golden oil does far more than support your joints. From stronger bones to a calmer mind, here’s a look at nine science-backed benefits of cod liver oil and why it deserves a spot in your daily routine.

1. A Powerhouse of Vitamins A and D

Cod liver oil is made from the liver of Atlantic cod and has long been used to ease joint pain and treat rickets — a bone-softening disease in children.
Unlike regular fish oil, which comes from the tissue of oily fish like mackerel or tuna, cod liver oil is extracted directly from the liver, making it especially rich in vitamins A and D.

Just one teaspoon (5 mL) of cod liver oil provides:

• Calories: 41
• Fat: 4.5 g
• Omega-3 fatty acids: 890 mg
• Vitamin A: 150% of your daily needs
• Vitamin D: 56% of your daily needs

Vitamin A helps keep your eyes, brain, and skin healthy, while vitamin D supports strong bones by helping your body absorb calcium.
However, moderation is key — too much vitamin A can be toxic. One teaspoon already provides about half the safe upper limit for adults.

In short: Cod liver oil is a nutrient-rich supplement loaded with essential vitamins A and D.

2. May Help Tame Chronic Inflammation

Inflammation helps your body heal, but when it sticks around too long, it can damage your tissues and raise your risk for heart disease and high blood pressure.

Cod liver oil is packed with omega-3 fatty acids, which help calm inflammation by blocking certain proteins that trigger it.
It also contains vitamins A and D, powerful antioxidants that neutralize harmful free radicals.

People low in these vitamins are often more prone to chronic inflammation — making cod liver oil an excellent choice to help restore balance.

In short: Cod liver oil’s omega-3s and antioxidants may help reduce long-term inflammation throughout the body.

3. Supports Stronger Bones

Bone health becomes more important as we age — especially after 40, when bone density starts to decline.

Because it’s rich in vitamin D, cod liver oil helps your body absorb calcium from food, which is vital for keeping bones strong. Studies suggest that combining vitamin D from cod liver oil with a calcium-rich diet can slow down age-related bone loss.

It’s especially helpful for people living in colder regions with limited sunlight, since their bodies can’t make enough vitamin D naturally.

In short: Vitamin D in cod liver oil helps maintain strong bones, particularly for people who get little sun exposure.

4. May Ease Joint Pain and Rheumatoid Arthritis Symptoms

Rheumatoid arthritis (RA) causes painful, stiff, and swollen joints — and while there’s no cure, cod liver oil may offer relief.

Research shows that taking cod liver oil daily can reduce morning stiffness and swelling. In one study, 39% of people taking cod liver oil were even able to cut back on their anti-inflammatory medications.

Experts believe this benefit comes from cod liver oil’s omega-3 fats, which reduce joint inflammation and protect against further damage.

In short: Regular use of cod liver oil may help ease joint pain and inflammation for people with rheumatoid arthritis.

5. Promotes Better Eye Health

Vision problems like glaucoma and age-related macular degeneration (AMD) affect billions worldwide. Chronic inflammation plays a big role in both conditions.

Cod liver oil provides omega-3s and vitamin A, nutrients linked to lower eye pressure and reduced risk of vision loss.

While vitamin A supports healthy vision, taking too much can be harmful, so it’s best to stick to recommended doses.

In short: Omega-3s and vitamin A in cod liver oil may protect your eyes from inflammation-related vision loss.

6. May Support Heart Health

Heart disease remains the world’s top killer — but omega-3-rich foods like fish and cod liver oil may help lower that risk.

Omega-3s have been shown to:

• Reduce triglycerides by 15–30%
• Increase HDL (“good”) cholesterol

While research specifically on cod liver oil and heart disease is limited, these benefits suggest it could play a helpful role in supporting cardiovascular health.

In short: The omega-3s in cod liver oil may help lower triglycerides and improve heart health over time.

7. Could Ease Anxiety and Depression

More than 600 million people live with anxiety or depression — and some research links these conditions to chronic inflammation.

Omega-3 fatty acids may help reduce inflammation in the brain, potentially improving mood. Vitamin D may also play a role by helping the brain release serotonin, the “feel-good” hormone.

Results vary between studies, but overall, cod liver oil may offer mild mood support.

In short: Cod liver oil’s omega-3s and vitamin D might help ease anxiety and depression, though more research is needed.

8. May Help Heal Stomach and Gut Ulcers

Ulcers are painful sores that form in the stomach or intestines, often from bacterial infections or excess acid.

Animal studies show that cod liver oil may help protect and heal the gut lining, speeding up recovery from ulcers.

Human studies are still limited, but early results are promising.

In short: Cod liver oil may help repair stomach and intestinal ulcers, though more research is needed in people.

9. Simple to Add to Your Routine

Cod liver oil is easy to take — available as a liquid or in softgel capsules.

There’s no official daily guideline, but most people safely take 1–2 teaspoons per day. Avoid high doses to prevent vitamin A overload.

If you’re pregnant, on blood thinners, or have a medical condition, talk to your doctor first.

To make it more palatable, mix cod liver oil into a smoothie or take it with a meal to mask the fishy taste.

In short: Cod liver oil is simple to use and fits easily into most wellness routines.

The Bottom Line

Cod liver oil is one of nature’s most powerful supplements — loaded with omega-3s, vitamin A, and vitamin D. It may help reduce inflammation, support bone and joint health, protect your eyes, and even lift your mood.A small daily dose could go a long way toward supporting your overall health — just remember, a little goes a long way.