1 teaspoon (medium) of Fish Oil (5 g) has 45 calories. That works out to 900 calories per 100 g. It contains 0 g of carbs, 0 g of protein, 5 g of fat and 0 g of fiber. Its 1 µg of Vitamin D covers 5% of the Daily Value. Its glycemic index is 0 (low), so it raises blood sugar slowly.

What is Fish Oil?

Fish oil is oil extracted from fish, commonly sold as a liquid or in capsules. In many countries it is used mainly as a supplement rather than as a cooking oil. The liquid is glossy and oily, with a distinctive fishy smell and taste; capsules make that flavour less noticeable. It is usually taken with a meal, not used for frying or everyday cooking.

Nutritionally, it is almost entirely fat and is known for its omega-3 content, with no protein or carbohydrate. If you find the flavour strong, capsules may be a more convenient option. For liquid fish oil, follow the label’s directions for storage after opening and use rather than adding it casually to hot food.

Fish Oil Nutrition Facts

Selected: 100 g

900

KCAL / 100G

Carbs

· 0% DV

Protein

· 0% DV

Fat

100g

· 128% DV

Fiber

· 0% DV

DV is the share of the daily value covered, on a 2,000 kcal reference diet.

Calories come from: Carbs 0% · Protein 0% · Fat 100%

Fish Oil Vitamins & Minerals

Vitamins

Vitamin D

20µg · 100% DV

Vitamin E

2mg · 13% DV

Vitamin A

30mg · 3% DV

0mg · 0% DV

Minerals

Iodine

20µg · 13% DV

Selenium

2µg · 4% DV

Phosphorus

5mg · 1% DV

Calcium

1mg · 0% DV

How Nutritious Is Fish Oil?

Nutrient density

High

70/ 100

How many vitamins, minerals and how much fiber this food carries per calorie. A high score means a lot of nutrition for few calories.

Satiety score

Low

0/ 100

An EatBetter score computed from fiber, protein and calorie density. A high score means staying full longer on the same calories.

Both scores are calculated per 100 g and do not change with the selected portion. The satiety score is EatBetter's own calculation, not a clinical measure.

Fish Oil Glycemic Index

GLYCEMIC INDEX

Low

0 Low5570100

GLYCEMIC LOAD

Low

Accounts for portion size — a more realistic measure than GI alone.

How to Burn Off Fish Oil

To burn the 900 calories in 100 g:

🚶

223min

Walking (5 km/h)

🏃

92min

Running (8 km/h)

🚴

122min

Cycling

🏊

105min

Swimming

Times are calculated with the MET equation for a 70 kg adult. Actual burn varies with your weight, age and pace.

Is Fish Oil Processed?

NOVA 2

Minimally Processed

1. Unprocessed

2. Minimally Processed

3. Processed

4. Ultra-Processed

NOVA classifies foods into 4 groups by industrial processing. NOVA 1 (unprocessed) is the healthiest.

Does Fish Oil Contain Allergens?

No known major allergens

Gluten free

Dairy free

Eggs free

Peanuts free

Tree nuts free

Fish free

Soy free

Sesame free

Which Diets Is Fish Oil Good For?

Vegan

— Not suitable

Vegetarian

— Not suitable

Gluten-Free

✓ Suitable

Dairy-Free

— Not suitable

Mediterranean

✓ Suitable

Paleo

✓ Suitable

Whole30

— Not suitable

DASH

— Not suitable

Keto

✓ Suitable

Low FODMAP

— Not suitable

Fish Oil Fat Profile

SATURATED

21g

MONOUNSATURATED

47g

POLYUNSATURATED

32g

⚖️

Omega 6:3 ratio 0.1:1

Below the ideal 4:1 — a good omega balance.

Compare Fish Oil

🛢️vs🧈

Fish Oil vs Butter183 kcal more per 100 g

→🛢️vs🫒

Fish Oil vs Olive oil16 kcal more per 100 g

→🛢️vs💊

Fish Oil vs Fish Oil CapsuleSame calories per 100 g

→🛢️vs🥥

Fish Oil vs Coconut oil38 kcal more per 100 g

→

Foods Similar to Fish Oil

🧈

Butter

717 kcal

🫒

Olive oil

884 kcal

💊

Fish Oil Capsule

900 kcal

🥥

Coconut oil

862 kcal

🥥

Coconut milk

230 kcal

🌻🛢️

Sunflower Oil

884 kcal

🛢️

Oil

884 kcal

🛢️

MCT Oil

860 kcal

Frequently Asked Questions About Fish Oil

What does Fish Oil do?

Fish Oil supplies omega-3 fatty acids, mainly EPA and DHA. These fats are part of cell membranes, and people often use fish oil supplements to add omega-3s when they do not regularly eat oily fish.

Does Fish Oil help with joint pain?

Fish Oil may modestly ease some symptoms of inflammatory joint conditions, but it is not a proven pain reliever for every kind of joint pain. It should not replace prescribed treatment or an assessment of persistent symptoms.

Can Fish Oil lower triglycerides?

Yes, high-dose omega-3 can lower blood triglycerides, but the amount and formulation matter. Do not increase a supplement dose to treat high triglycerides on your own; therapeutic use should be guided by a healthcare professional.

Should you take Fish Oil with food?

Taking Fish Oil with a meal often makes it easier to tolerate and may reduce fishy burps or stomach upset. Follow the directions for your specific product, especially if its label gives instructions about meals or refrigeration.

Is Fish Oil the same as omega-3?

No. Fish Oil is one source of omega-3 fats, particularly EPA and DHA; omega-3 is a broader group that also includes plant-based ALA. The types and amounts of omega-3 can differ between fish oil products.

What are the side effects of Fish Oil?

Fish Oil can cause fishy aftertaste, burping, nausea, or loose stools. These effects are often mild, but unusually easy bruising or bleeding deserves attention, especially for someone taking medicine that affects blood clotting.

Does Fish Oil help your brain or memory?

Fish Oil provides DHA, a fat found in brain tissue, but taking a supplement has not been shown to reliably improve memory in healthy adults. It is not a substitute for sleep, a balanced diet, or medical care for memory problems.

Does Fish Oil go bad, and how should you store it?

Yes, Fish Oil can turn rancid when exposed to heat, light, or air. Keep it tightly closed and follow the label’s storage directions; a sharp, stale, or unpleasant smell or taste is a reason not to use it.

Can you take Fish Oil during pregnancy?

Some Fish Oil products may be suitable during pregnancy, but cod liver oil can contain substantial preformed vitamin A, which can be harmful in excess. Ask your prenatal healthcare professional before taking a fish oil supplement.

Does Fish Oil prevent heart disease?

Fish Oil supplements have not been shown to prevent heart disease for everyone. Omega-3s can affect blood fats, but taking an over-the-counter supplement is not a replacement for established heart-health measures or prescribed medicines.

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Nutrition data compiled from USDA FoodData Central and scientific sources.

· Last updated: September 24, 2026