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Everything in this guide

Updated November 15, 2026.

The guide

Good fats, bad fats: swap the solid ones for fats that pour

One test sorts good fats from bad. Swap the fats that sit solid on your counter for ones that pour, and eat fish twice a week.

The four fats, and why some are solid

Fat chains are straight or kinked. Straight ones stack and sit solid like butter, kinked ones slide and pour like oil, and the shape changes what each fat does in you.

How much fat, and how much saturated fat?

Total fat at 20 to 35% of calories, about 44 to 78 g on 2,000. Saturated fat under 10%, about 22 g. The label's 20 g is fixed, so check it against your calories.

What saturated fat does

It slows how fast your liver clears LDL, so more stays in your blood. In 15 trials, eating less meant 17% fewer heart events, and what replaced it decided how much.

Where the saturated fat in your day comes from

Across the US, sandwiches and burgers, desserts and mixed dishes carry the most. In your own day it's usually one or two foods: butter, cheese, fatty meat or pastry.

Oils in the kitchen

Extra virgin olive oil for most cooking and frying, canola for baking and neutral dishes, and butter or coconut oil for flavor. Smoke point is only part of the story.

Omega-3 and omega-6

The US advice is fish, at least 8 ounces a week: about 280 to 700 mg of EPA and DHA a day from salmon, sardines or trout. Plant omega-3 is a different fat.

Trans fat: mostly gone, not all

Artificial trans fat has been out of US food since 2018 to 2021. A little natural trans fat stays in milk, butter and meat, and labels round under 0.5 g to zero.

When the advice changes

On keto, keep the carbs low and change the fat. If you're vegan, add algae oil to flax and walnuts. If you're pregnant, eat 8 to 12 oz of low-mercury fish a week.

How to check your swap worked

Make one change and keep it for 6 to 12 weeks, then get a cholesterol test at the same lab. People respond differently, so your own result is the one that counts.

What the 2026 dietary guidelines changed about fat

The January 2026 guidelines put olive oil first, listed butter and tallow as options, welcomed full-fat dairy and kept the 10% saturated fat line, in grams.

Seed oils

Are seed oils bad for you?

No. Swapped in for butter, seed oils lower LDL, and trials found no rise in inflammation. The fried and packaged foods they often come in are what to eat less of.

Questions

Avocado oil or olive oil?

They're close cousins, both mostly monounsaturated with 1.6 to 1.8 g of saturated fat a tablespoon. In one lab test the olive oil smoked later. Pick by taste.

Can fish oil cause an irregular heartbeat?

In seven big heart trials, fish oil raised the risk of atrial fibrillation about 25%, and about half above 1 g a day. Ask your doctor before high doses.

How do vegans get omega-3?

ALA is easy from flax, chia and walnuts, but the body turns only a little into EPA and DHA. Algae oil carries EPA and DHA directly, from the sea algae that make them.

How many fish oil capsules should I take a day?

Check the back of the bottle, since a 1,000 mg capsule means 1,000 mg of oil. Eat fish first. Over 1 g a day of EPA and DHA, talk to your doctor.

How much fat is in an avocado?

About 5 g an ounce (a fifth of one), mostly monounsaturated, with under 1 g saturated. A whole one has about five times that.

How much fat should I eat a day?

20 to 35% of your calories, about 44 to 78 g on 2,000. The kind of fat counts for more than the total, so keep saturated fat under 10%.

How much fat should I eat on 1,500 calories?

About 33 to 58 g of fat, with saturated fat under 17 g. A tablespoon of butter would be 7.2 of those.

How much fish should I eat while pregnant?

The FDA says 8 to 12 ounces a week while pregnant or breastfeeding, 2 to 3 servings from its lowest-mercury list, like salmon, sardines and trout.

How much omega-3 do I need a day?

The US advice is fish: at least 8 ounces a week. Of salmon, sardines or trout, that's about 280 to 700 mg of EPA and DHA a day. The counter does yours.

How much saturated fat is in butter?

7.2 g a tablespoon, about a third of a 2,000 calorie day's line. About 62% of butter's fat is saturated. Ghee is the same fat, a little more concentrated.

How much saturated fat should a woman eat a day?

The same 10% line as everyone. On 1,600 calories that's about 18 g, on 1,800 about 20 g, so the label's 20 g can be more than your line.

How much saturated fat should I eat a day?

Under 10% of your calories: about 22 g on 2,000 calories, 17 g on 1,500, 28 g on 2,500 (2025 to 2030 US guidelines). The tool works out yours.

How much saturated fat should I eat with high cholesterol?

Under 10% is the US line for everyone. With high LDL, swapping saturated fat for vegetable oils is the change that moves it. cholesterol.guide sizes it for your number.

Is 20 g of saturated fat a day too much?

On 2,000 calories it's 9%, just under the line. On 1,500 it's 12%, over. The 20 g on labels is a fixed Daily Value, so check it against your own calories.

Is beef tallow healthy?

The 2026 guidelines list it as an option, after olive oil. A tablespoon has 6.4 g of saturated fat, about half its fat. Use it for flavor, and count it.

Is butter worse than olive oil?

For your heart, yes. Butter has 7.2 g of saturated fat a tablespoon, olive oil 1.8. Swapping 10 g of butter a day for plant oils went with 17% fewer deaths.

Is canola oil bad for you?

No. It has 1.0 g of saturated fat a tablespoon, near the lowest of any oil, and in a 33-year US study more canola went with fewer deaths. Long frying is its weak spot.

Is cheese high in saturated fat?

Yes. An ounce of cheddar has 6.0 g, more than a quarter of a 2,000 calorie day's line. Strong cheese goes further, so you can use less.

Is coconut oil healthy?

It's the most saturated cooking fat, about 83%, and raised LDL about 10 mg/dL against plant oils in 16 trials. Use it for flavor and keep a plant oil for every day.

Is full-fat dairy healthy?

The 2026 guidelines say include it, with no added sugar, and keep saturated fat under 10%. A cup of whole milk has 5.1 g, so count it.

Is saturated fat bad for you?

It raises LDL, and in 15 trials cutting it meant 17% fewer heart events. Swap it for olive, canola or other plant oils, the swap with the best evidence.

Olive oil or canola oil?

Keep both. Extra virgin olive oil for most cooking, since it held up best to heat in a lab test, and canola for baking. Both lower LDL in place of butter.

Should kids drink whole milk?

Pediatricians advise whole milk from 1 to 2, then lower-fat milk. The 2026 US guidelines favor full-fat dairy for kids, and schools can serve whole milk again.

What are healthy fats?

Mostly the unsaturated ones in olive and canola oil, nuts, seeds, avocado and oily fish. Eaten in place of butter and fatty meat, they lower LDL.

What foods are high in omega-3?

Oily fish, like salmon, herring, mackerel, sardines and trout, for EPA and DHA. Chia, walnuts, ground flax and canola oil for the plant kind. Food first, capsule second.

What foods are high in saturated fat?

Coconut oil (11.2 g a tablespoon), butter (7.2), cheese (6.0 an ounce), fatty beef, cream and pastry. In US diets, sandwiches and burgers carry the most.

What is saturated fat?

Fat whose chains are straight, so they stack tight and stay solid at room temperature. Butter, cheese, fatty meat, coconut and palm oil have the most.

What is the healthiest cooking oil?

Extra virgin olive oil for most cooking. It's low in saturated fat and, averaged over two lab heat tests, broke down the least. Canola when you want no taste.

What is the smoke point of olive oil?

In one lab test, extra virgin olive oil smoked at 404 °F (207 °C) and, averaged over two heat tests, made the fewest breakdown compounds of ten oils.

What's the easiest way to cut saturated fat?

Change your cooking fat. Olive or canola oil in place of a daily tablespoon of butter takes off 5.4 to 6.2 g, about a quarter of your line, with one bottle.

Which fish has the most omega-3?

Farmed salmon and herring lead the common fish, about 1.7 to 1.8 g of EPA and DHA in 3 oz. Sardines and trout have about 0.8, canned light tuna 0.2.

Why do fatty foods make me nauseous on Ozempic?

GLP-1 drugs slow how fast the stomach empties, and a big fatty meal slows it more. Smaller meals with less fat usually sit better.

Why does saturated fat raise cholesterol?

It slows the liver's LDL receptors, the drain that pulls LDL out of the blood, so more stays in. cholesterol.guide has the numbers.

Why is my LDL high on keto?

Butter, cream and fatty meat can push LDL up a lot in some people. Keep the carbs low and change the fat. The study saying plaque didn't follow it was retracted in 2026.

Myths

Eating fat makes you fat

In a year-long trial of 609 adults, healthy low-fat and low-carb diets lost about the same weight. Fat has 9 calories a gram, so the portion decides it.

Saturated fat is fine now, so butter is back

In 15 trials, cutting saturated fat meant 17% fewer heart events. The 2026 guidelines still cap it at 10%. Butter is an option, and olive oil is still first.

Full-fat dairy is fine now, so eat all you want

The 2026 guidelines say full-fat dairy with no added sugar, and saturated fat under 10%. Three cups of whole milk is 15.3 g, about 70% of a 2,000 calorie line.

You shouldn't cook with olive oil because of its smoke point

In one lab test, extra virgin olive oil smoked at 404 °F and broke down less over 6 hours at frying heat than the seed oils. Deep frying tops out around 356 °F.

Avocado oil is the best oil for high heat

It's a good oil, built a lot like olive oil. But in one lab test the avocado oil smoked at 386 °F, before the olive oil did. Smoke point depends on the bottle.

You need to fix your omega-6 to omega-3 ratio

Your EPA and DHA is the number to raise, and fish raises it. People with more omega-6 in their blood had less heart disease, in 30 cohort studies.

Fish oil capsules protect your heart

In VITAL, 25,871 people took fish oil or a placebo for 5 years, and major heart events came out 386 against 419. Above 1 g a day, atrial fibrillation got more likely.

Trans fat is gone, so you can ignore it

Partially hydrogenated oil has been out of US food since 2018 to 2021. A little trans fat occurs naturally in milk, butter and meat, and labels round it to zero.

Margarine is worse than butter

The old margarines were made with trans fat. US spreads haven't had partially hydrogenated oil since 2018, and soft tub spreads carry far less saturated fat than butter.