The difference between healthy and unhealthy fats
The science has changed, and now avoiding all fat isn’t the goal. Learn more about why and which ones most belong on your plate.

In this article:
- 1/ Unsaturated fats
- 2/ Where you'll find them:
- 3/ Saturated fats
- 4/ Where you’ll find them:
- 5/ Trans fats
- 6/ Where you’ll find them:
- 7/ What’s better for limiting unhealthy fat — butter or margarine?
- 8/ Butter
- 9/ Margarine
- 10/ How much fat should I eat in a day?
- 11/ What's the deal with coconut oil?
- 12/ The bottom line
Unsaturated fats
Unsaturated fats are beneficial. They canimprove blood cholesterol levels, ease inflammation, and even stabilize heart rhythms.
There are two kinds of unsaturated fat (monounsaturated and polyunsaturated) and most foods contain a combination. Certain forms of polyunsaturated fat (omega-3 and omega-6) are important because our bodies don’t make them, so we need to get them from food.
Where you'll find them:
Monounsaturated fats are found in avocados, peanut butter, almonds, seeds including sesame and pumpkin seeds, and canola and olive oils. Polyunsaturated fats, including omega-3 fats, are present in fish, while plant sources include flax seeds, walnuts, and canola or soybean oil.
Saturated fats
The Dietary Guidelines for Americansrecommends limiting saturated fat to less than 10% of our total daily calorie intake: It’s why foods higher in saturated fat are higher in Points. Replacing saturated fat with unsaturated fat can help you stick to your Points budget, not to mention there’s evidence thatswapping polyunsaturated fatfor saturated fat can lower your risk of heart disease. What’s the difference? Eating too much saturated fat increases your levels of LDL cholesterol — the harmful kind that’s linked to heart disease and strokes.
Where you’ll find them:
Pizza, cheese, whole and reduced fat milk, butter, ice cream, meat products (including sausage, bacon, beef, and hamburgers), cookies, cakes, and other grain-based desserts.
Trans fats
Your bodydoesn’t need trans fats, and they can increasedamaging LDL cholesterolwhile simultaneously lowering beneficial HDL cholesterol, a double whammy for your body that’s linked to anincreased risk of heart disease, the leading cause of death in the U.S. It used to be that manufacturers were allowed to add oils that contained trans fats to foods, but that’s beenbannedfor several years. Now the main way people consume trans fats is from animal products, where they occur naturally in small amounts.
Where you’ll find them:
Milk, butter, cheese, and meat products (including sausage, bacon, beef, and hamburgers).
What’s better for limiting unhealthy fat — butter or margarine?
Butter
Butter contains saturated fat, and eating too much saturated fat increases your levels of LDL cholesterol — the harmful kind that’s linked to heart disease and strokes. That said, it’s OK to use small amounts and still have an overall healthy way of eating.
Margarine
Because margarine is made from a blend of mostly plant oils, it usually has less unhealthy saturated fat than butter. Since “most margarines are substantially lower in saturated fats than butter,” says physician Dr. Harriet Hall, M.D. It’s smart to check the margarine label and choose the one with the lowest amount of saturated fat.
Still, themore solida margarine is, the more saturated fat it has, so avoid sticks of margarine when possible.
In short, it’s fine to use either margarine or butter — just make sure that if you go with butter, try to limit your amount, and if you’re using margarine, opt for the softer kind in the tub or squeeze tube instead of in stick form. Or better yet: Go with a fully unsaturated fat and dip your bread inolive oil instead.
How much fat should I eat in a day?
Remember that fat is necessary for a healthy body, since it helps with cell growth, hormone production, nutrient absorption, and heart health. But what kind of fat you’re eating matters just as much as the amount. Having the majority of the fats you eat coming from unsaturated fat is the healthiest way to go.
As for overall fat intake, the most recent Dietary Guidelines for Americans removed restrictions on total fat intake, but still emphasizes limiting saturated fat as part of overall healthy eating patterns; the recommendation is that no more than 10 percent of your total daily calories come from saturated fat.
Because foods higher in saturated fat are higher in Points and unsaturated fats lower a food’s Points value, WeightWatchers guides you towards a pattern of eating that’s lower in saturated fat. In other words, by sticking within your Points, you don’t have to do the math on saturated fat grams.
What's the deal with coconut oil?
Coconut oil contains thesame amountof calories per tablespoon as olive oil. Yet unlike olive oil, it’s very high in the saturated fats you want to limit. In fact, coconut oil contains 82 percent saturated fat — much more than butter, which is 52 percent saturated fat.
Replacing oils that are high in saturated fat, like coconut oil, with oils high in unsaturated fat (like olive oil and rapeseed oil) is a healthier choice that can save you Points.
The bottom line
Fat shouldn’t be demonized — your body needs them. But shifting what kinds of fat you’re eating can boost your health. In short, try to limit your intake of saturated fats to less than 10% of your total daily calorie intake and to swap out saturated fats whenever you can for healthier unsaturated fats.