Royal nutritionist Gabriela Peacock reveals why a daily handful of nuts can safeguard your heart, mind and even your hair.
For years nuts have been painted as the villains of a healthy diet – high in fat, calorie-dense and irresistibly crunchy. Yet the latest research, echoed by British nutrition experts, tells a very different story. Brazil nutswalnuts and almonds bring a suite of nutrients that protect cells, support the immune system and even nurture hair, while their calories behave unlike those in processed snacks.
Why nuts don’t add unwanted pounds
The first alarm many people feel is the calorie count: a modest handful of almonds can top 150 kcal, and Brazil nuts sit among the fattier plant foods. However, not all of those calories are bio-available.
Studies from the U.S. Department of Agriculture show that roughly 20 % of the fat in almonds and walnuts never reaches the bloodstream, trapped inside fibrous cell walls and expelled undigested. Registered nutritionist Grace Kingswell explains, “Nuts are incredibly nutrient-dense, but the body doesn’t utilise every calorie they contain, which is why they don’t trigger the same weight-gain response as other high-fat foods.”
The blend of protein, soluble fibre and unsaturated fats creates a satiety signal that steadies blood-sugar spikes, reducing the urge to snack later.
A review of weight-loss trials published last year found that participants who added nuts to their daily plan sometimes shed more weight than those who eliminated them, provided portions stayed around 30 g – roughly a small handful.
Star-performing nuts and their unique benefits
Walnuts earn the nickname “brain food” thanks to their rich supply of omega-3 fatty acids, protein and polyphenols. A University of Reading study demonstrated that young adults who added 50 g of walnuts to breakfast recorded faster reaction times and sharper memory throughout the day, marking the first trial to link a single serving with measurable cognitive improvement.
Brazil nuts dominate when it comes to selenium an essential mineral that acts as a potent antioxidant and supports thyroid function. The NHS recommends 75 µg of selenium daily for men and 60 µg for women; one to two Brazil nuts fulfil that requirement. Nutritionist Gabriela Peacock who advises Princess Beatrice, notes, “Selenium is a really good antioxidant. It’s another kind of mineral which you need in your diet. It’s very important for your hair.” Public-health expert Dr Emma Derbyshire adds that older adults often fall short on selenium, making a modest daily intake of Brazil nuts a smart preventive measure. Caution is advised, however, because excess selenium can become toxic.
Almonds shine for fibre. A 30 g serving delivers about 4 g of fibre and over 7 µg of vitamin E – nearly double the adult daily recommendation. This fibre bolsters gut microbiome diversity, promotes regular bowel movements and contributes to a feeling of fullness that can curb overeating. Vitamin E also plays a role in protecting low-density lipoprotein (LDL) from oxidation, a factor linked to heart disease.
Pecans have been shown to lower LDL cholesterol when consumed between 30 g and 60 g daily, according to a review in the journal Nutrients. Their high vitamin E content is thought to inhibit the inflammatory transformation of LDL particles.
Nut butters – the concentrated alternative
Nut butters have surged in popularity, offering protein, fibre and healthy fats in a spreadable form. Yet not all are created equal. Kingswell warns, “Many nut butters contain added palm oil or sugar; look for a product that is 100 % nuts with perhaps a pinch of salt.” Because a tablespoon of butter can equate to several handfuls of whole nuts, it’s easy to overshoot calorie limits.
Practical ways to reap the benefits safely
Experts agree that whole nuts remain the gold standard for nutrient delivery. Pairing them with vitamin-C-rich fruit such as berries or oranges can improve iron absorption, while sprinkling nuts over yogurt creates a “protein synergy” of complementary amino acids, according to Dr Derbyshire. Soaking nuts overnight and gently drying them – a process known as activation – may increase nutrient bioavailability and ease digestion.
