The simplest answer: eat about a small handful (roughly 30 grams or 1 ounce) of nuts per day, and you’ll capture most of the health benefits that dietary guidelines worldwide recommend. But how you prepare, store, and pair your nuts with other foods can meaningfully change what your body actually gets from them. Here’s what matters.
How Much to Eat Daily
Dietary guidelines across multiple countries converge on 30 grams per day, which is about 1 ounce or a small palmful. That’s roughly 23 almonds, 14 walnut halves, or 49 pistachios. The FDA allows a qualified health claim stating that eating 1.5 ounces per day of certain nuts, as part of a diet low in saturated fat, may reduce the risk of coronary heart disease.
One nut deserves special attention: Brazil nuts. A single Brazil nut contains 68 to 91 micrograms of selenium, and the safe upper limit for adults is 400 micrograms per day. An ounce of Brazil nuts (6 to 8 nuts) delivers roughly 544 micrograms, well past that threshold. Limit yourself to one or two Brazil nuts per day if you eat them regularly.
Raw, Roasted, or Soaked
Raw nuts retain the most nutrients. Research on macadamia nuts shows that antioxidant levels, healthy fats, and plant compounds all drop as roasting temperature rises. Nuts roasted at moderate temperatures (around 125°C/257°F) strike a reasonable middle ground, preserving decent nutrient levels while improving flavor and texture. At high temperatures (150°C/300°F and above), antioxidant activity drops substantially, total fatty acid content shrinks, and flavors can turn bitter.
If you buy roasted nuts, look for dry-roasted varieties without added oils or sugar. Lightly roasted is better than heavily roasted from a nutritional standpoint, though the difference between raw and a gentle roast is modest enough that taste preference can guide you.
Soaking nuts overnight is a popular practice meant to reduce phytic acid, a compound that binds to minerals like iron, zinc, calcium, and magnesium and makes them harder for your body to absorb. Soaking does reduce phytic acid in grains and legumes (by roughly 16 to 56 percent depending on duration and food type), and the same principle applies to nuts. If you eat a varied diet with plenty of mineral-rich foods, phytic acid from a handful of nuts is unlikely to cause a deficiency. But if nuts are a major protein source for you, or you notice digestive discomfort from raw nuts, soaking for 8 to 12 hours in salted water and then dehydrating them can help.
Keep the Skins On
The papery brown skin on almonds and the thin membrane on walnuts contain a concentrated dose of polyphenols, the plant compounds linked to antioxidant and anti-inflammatory effects. Blanched almonds (with skins removed) lose this layer entirely. Almond skins alone are 0.2 to 0.8 percent polyphenols by dry weight, which accounts for a significant share of the nut’s total antioxidant value. Unless you have a specific reason to remove them, eat your nuts with skins intact.
Chew Thoroughly
This one sounds trivial, but it genuinely matters. Nut cells are built like tiny sealed containers, and your body can only access the fats and nutrients inside cells that get broken open. In a study on almonds, people who chewed minimally (10 chews) excreted about 44 percent of the fat they consumed. Those who chewed extensively (40 chews) excreted only about 31 percent. That’s a meaningful difference in the calories and nutrients your body actually absorbs.
Whole almonds require roughly 53 chewing cycles on average for complete breakdown, though individual variation is large (anywhere from 26 to 125 cycles). Ground or sliced nuts have a slight edge in nutrient release, but the difference is modest if you chew whole nuts thoroughly. The practical takeaway: don’t just swallow chunks. Chew until the nut is a smooth paste in your mouth before swallowing, and your body will extract far more from each serving.
Pair Nuts With Carbs to Blunt Blood Sugar
Eating nuts alongside carbohydrate-rich foods reduces the blood sugar spike that follows the meal. Almonds lowered the glycemic impact of carbohydrate foods in a dose-dependent way, meaning more almonds produced a greater effect. Pistachios showed the same pattern when eaten with a carbohydrate meal, and mixed nuts at doses of 30, 60, and 90 grams progressively flattened the glucose response to white bread.
The likely mechanisms are straightforward: the fat and protein in nuts slow stomach emptying, and the added fat may reduce how quickly carbohydrates are absorbed. This makes nuts an especially smart snack to pair with fruit, toast, oatmeal, or rice. Eating a few nuts before or during a starchy meal is a simple way to smooth out your blood sugar curve.
Store Nuts to Prevent Rancidity
Nuts are high in unsaturated fats, which is what makes them healthy but also what makes them go bad. Those fats oxidize over time, producing off-flavors and potentially harmful compounds. Research on walnuts found that storing them at refrigerator temperature (5°C/41°F) preserved their sensory quality and health-promoting compounds for up to three months. At room temperature (23°C/73°F), rancidity developed faster and involved a broader range of oxidation byproducts.
Signs of rancid nuts include a bitter or paint-like taste, a sharp or stale smell, and a rubbery or overly soft texture. If you buy nuts in bulk, store what you’ll eat within a week or two at room temperature and refrigerate or freeze the rest. Freezing extends shelf life to six months or longer for most varieties. Keep them in airtight containers, since exposure to air accelerates oxidation.
Mix Up Your Varieties
Different nuts offer different nutritional strengths. Walnuts are exceptionally rich in omega-3 fatty acids. Almonds are high in vitamin E and calcium. Cashews provide more iron and zinc than most other nuts. Pistachios are relatively high in protein and lower in calories per serving. Pecans and macadamias are rich in heart-healthy monounsaturated fats. Eating a rotating mix gives you the broadest nutrient profile rather than loading up on one type.
Unsalted and unflavored varieties are the cleanest choice. Salted nuts can contribute a surprising amount of sodium if you eat them daily, and flavored or honey-roasted versions often carry added sugar and oils that offset some of the health benefits. When the ingredient list is just “nuts,” you’re getting the real thing.