Adding more fat to your diet comes down to choosing the right sources and building them into meals you already eat. A single tablespoon of olive oil adds 120 calories and 14 grams of fat, so small changes at the stove or the table add up fast. Whether you’re trying to gain weight, absorb nutrients better, or shift your macros for a specific eating plan, the strategies are straightforward once you know which fats to prioritize.
Why Your Body Needs Dietary Fat
Fat does more than provide energy. It’s essential for absorbing fat-soluble vitamins (A, D, E, and K), building cell membranes, producing hormones, and protecting your organs. Your brain is roughly 60% fat by dry weight, and the omega-3 fatty acids found in fish are directly linked to better cognitive function. A single 3.5-ounce serving of salmon delivers about 2.2 grams of omega-3s, and the American Heart Association recommends eating fish at least twice a week.
Eating too little fat can leave you feeling hungry between meals, make your skin dry, and reduce how well you absorb key nutrients from vegetables and supplements. Even a small amount of fat eaten alongside carotenoid-rich foods like carrots or spinach improves uptake, though some nutrients like vitamin E appear to absorb well with relatively modest amounts of fat in a meal.
How Much Fat to Aim For
The WHO recommends that adults get up to 30% of their total calories from fat. On a 2,000-calorie diet, that’s about 65 grams of fat per day. If you’re currently well below that, you have room to add healthy fats without overthinking it.
Some people intentionally eat more. A ketogenic diet, for instance, pushes fat to 70 to 80% of total calories, translating to roughly 165 grams of fat on a 2,000-calorie plan. That’s a therapeutic approach with specific goals, not a universal recommendation, but it illustrates just how wide the range of fat intake can be depending on your situation.
Within whatever total you’re targeting, keep saturated fat low. The American Heart Association recommends less than 6% of total calories from saturated fat, which is about 13 grams on a 2,000-calorie diet. The rest should come from unsaturated sources.
Best Fat Sources to Add
Plant-based and seafood fats consistently outperform animal fats in long-term health outcomes. Diets built around unsaturated fats are linked to lower inflammation, better blood sugar control, reduced heart disease risk, and a healthier gut microbiome. That doesn’t mean you need to avoid all animal fat, but the bulk of any increase should come from these categories:
- Nuts and seeds: Almonds, walnuts, chia seeds, flaxseeds, and hemp hearts. A quarter cup of walnuts has about 18 grams of fat, mostly polyunsaturated.
- Avocados: Half a medium avocado provides roughly 15 grams of mostly monounsaturated fat.
- Fatty fish: Salmon, mackerel, sardines, and trout. Two servings per week is the baseline recommendation, and most Americans don’t hit it.
- Olives and olive oil: A staple in Mediterranean eating patterns. One tablespoon of extra-virgin olive oil gives you 14 grams of fat.
- Nut butters: Peanut, almond, cashew, or tahini. Two tablespoons typically deliver 16 to 18 grams of fat.
- Full-fat dairy: Greek yogurt, cheese, and butter in moderate amounts add both flavor and fat, though they contribute more saturated fat than plant sources.
Practical Ways to Add Fat to Meals
The easiest method is to finish dishes with fat after cooking. Drizzle olive oil over roasted vegetables, soups, or grain bowls right before serving. Toss salads with a generous oil-based dressing instead of a fat-free version. Stir a spoonful of pesto, tahini, or nut butter into noodles, oatmeal, or smoothies.
At the stove, roast vegetables in avocado or olive oil rather than steaming them. Add sour cream or a pat of butter to potatoes. Top rice with curry sauce, alfredo, or melted cheese. Make tuna or salmon salad with mayonnaise or olive oil instead of relying on lemon juice alone. Each of these swaps adds anywhere from 10 to 20 grams of fat per serving without changing the structure of your meal.
Snacking is another easy window. A handful of mixed nuts, a few slices of cheese, trail mix with dark chocolate, or apple slices with almond butter all deliver fat between meals. If you’re blending smoothies, a tablespoon of coconut oil, a quarter of an avocado, or a scoop of nut butter blends in without changing the flavor much.
Choosing the Right Oil for Cooking
Not every oil handles heat the same way. Each oil has a smoke point, the temperature at which it starts to break down and lose nutritional value. Using the wrong oil at high heat creates off-flavors and potentially harmful compounds.
For high-heat cooking like searing, stir-frying, or roasting above 400°F, avocado oil (smoke point 520°F) is the most versatile option. Refined coconut oil (450°F), ghee (480°F), and peanut oil (450°F) also work well. For sautéing at moderate temperatures, regular olive oil handles the job fine with a smoke point around 465°F when refined.
Extra-virgin olive oil, walnut oil, and toasted sesame oil are better saved for dressings, dipping, and finishing. They’re unrefined, which preserves flavor and nutrients but makes them fragile at high temperatures. Think of these as “cold” or “after cooking” oils. Drizzle them on at the end.
Fats to Limit or Avoid
Artificial trans fats are the one category to actively avoid. The FDA determined in 2015 that partially hydrogenated oils, the main source of artificial trans fat, are no longer safe for use in food. Manufacturers were required to remove them by 2021, and in 2023 the FDA formally cleaned up the remaining regulatory references. You’re unlikely to encounter them in packaged food now, but checking the Nutrition Facts label for trans fat is still a reasonable habit, especially with imported products.
Saturated fat from red meat, processed meat, full-fat cheese, and butter doesn’t need to be eliminated, but it should stay in the background. When you swap saturated fat for unsaturated fat, blood cholesterol improves and heart disease risk drops. Diets higher in unsaturated fat are also associated with lower cancer risk. The practical move is simple: use olive oil where you’d use butter, snack on nuts where you’d reach for cheese, and eat fish more often than steak.
Sample Day With Added Fat
Breakfast: Oatmeal with a tablespoon of almond butter and a sprinkle of chia seeds (about 14 grams of added fat). Lunch: A grain bowl with roasted vegetables cooked in olive oil, half an avocado, and a tahini drizzle (roughly 25 grams of added fat). Dinner: Pan-seared salmon with a side salad dressed in walnut oil vinaigrette (about 20 grams of added fat). That alone brings you close to 60 grams of fat for the day, mostly from unsaturated sources, without any specialty products or dramatic changes to how you eat.
If you’re still falling short, a small handful of mixed nuts as an afternoon snack adds another 15 grams. Consistency matters more than any single meal. Build the habit of adding a fat source to every plate, and your intake will rise naturally within a week or two.