1 teaspoon (medium) of Omega-3 fish oil (5 g) has 41 calories. That works out to 900 calories per 100 g. It contains 0 g of carbs, 0 g of protein, 4.5 g of fat and 0 g of fiber. Its glycemic index is 0 (low), so it raises blood sugar slowly.

What is Omega-3 fish oil?

Omega-3 fish oil is an oil obtained from oily fish and sold as a dietary supplement, either as a liquid or in capsules. It is generally taken rather than used as a cooking oil, so follow the directions on the particular product instead of adding it freely to recipes.

The liquid can have a mild or pronounced fishy taste, while capsules avoid most of that flavour. Many people take it with a meal; in places where supplements are commonly part of a daily routine, it may simply be taken alongside breakfast or dinner. Nutritionally, it is almost entirely fat, with no protein or carbohydrate. If you dislike the taste, capsules may suit you better, and following the storage instructions helps preserve the product’s quality.

Omega-3 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%

Omega-3 fish oil Vitamins & Minerals

Vitamins

Vitamin D

10µg · 50% DV

Vitamin E

2mg · 13% DV

Vitamin A

30µg · 3% DV

0mg · 0% DV

Minerals

Calcium

1mg · 0% DV

Iron

0mg · 0% DV

Magnesium

1mg · 0% DV

Zinc

0mg · 0% DV

How Nutritious Is Omega-3 fish oil?

Nutrient density

Medium

40/ 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.

Omega-3 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 Omega-3 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 Omega-3 fish oil Processed?

NOVA 3

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 Omega-3 fish oil Contain Allergens?

Contains these allergens:

Gluten free

Dairy free

Eggs free

Peanuts free

Tree nuts free

Fish yes

Soy free

Sesame free

Which Diets Is Omega-3 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

Omega-3 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 Omega-3 fish oil

🫙vs🧈

Omega-3 fish oil vs Butter183 kcal more per 100 g

→🫙vs🫒

Omega-3 fish oil vs Olive oil16 kcal more per 100 g

→🫙vs💊

Omega-3 fish oil vs Fish Oil CapsuleSame calories per 100 g

→🫙vs🥥

Omega-3 fish oil vs Coconut oil38 kcal more per 100 g

→

Foods Similar to Omega-3 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 Omega-3 fish oil

What are the benefits of Omega-3 fish oil?

Omega-3 fish oil provides EPA and DHA, fatty acids that support normal heart and blood-vessel function. It is not a treatment for disease, and taking it does not replace a balanced diet or prescribed care.

Should you take Omega-3 fish oil with food?

Taking Omega-3 fish oil with a meal can reduce fishy burps or stomach discomfort for some people. Follow the directions for your specific liquid or capsule, since serving instructions can differ between products.

Can Omega-3 fish oil lower triglycerides?

Omega-3 fish oil can lower triglycerides, but the effect depends on the amount of EPA and DHA and the product used. Do not use an over-the-counter supplement in place of treatment prescribed for high triglycerides.

Is Omega-3 fish oil the same as omega-3?

No. Omega-3 refers to a family of fatty acids, while Omega-3 fish oil is a product made from fish that supplies some of them, especially EPA and DHA. Omega-3s also occur in plant foods.

Is Omega-3 fish oil better than krill oil?

Neither is automatically better for everyone. Both can provide EPA and DHA, but their amounts and formulations differ; compare the actual EPA and DHA content rather than the total oil alone.

Does Omega-3 fish oil cause fishy burps?

Yes, Omega-3 fish oil can cause fish-flavoured burps, especially if it causes reflux or is taken without food. Taking it with a meal may help; a strongly rancid or sour smell is a reason not to use it.

Can children take Omega-3 fish oil?

Yes, children can take Omega-3 fish oil products made for their age group, but adult products and servings are not automatically suitable. The child’s age, diet and the product’s EPA and DHA content matter.

Can you take Omega-3 fish oil during pregnancy?

Omega-3 fish oil may be used during pregnancy, but the right product and amount depend on individual circumstances. Ask your prenatal clinician before starting it, and do not confuse fish oil with fish liver oil.

Does Omega-3 fish oil interact with blood thinners?

It can matter if you take blood-thinning medication, particularly at higher omega-3 intakes. Ask your prescriber or pharmacist before adding Omega-3 fish oil rather than changing your medication or supplement routine yourself.

How can you tell if Omega-3 fish oil has gone rancid?

A sharply sour, stale or unusually rancid fish smell or taste can indicate that Omega-3 fish oil has oxidized; do not consume it. Keep it away from heat and light and follow the storage directions for that product.

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Nutrition data compiled from USDA FoodData Central and scientific sources.

· Last updated: September 24, 2026