The Royal Nutritionist's Favorite Nut: Brazil Nuts and Their Health Benefits

Nuts, often perceived as calorie-dense and detrimental to diets, are being re-evaluated by experts, including nutritionist Gabriela Peacock, who advises members of the royal family.

Peacock highlights Brazil nuts as a simple yet powerful addition to one's diet, citing their benefits in bolstering the immune system, protecting cells from damage, and potentially warding off heart disease due to their high selenium content. She also notes their reputation for promoting healthy hair growth and preventing breakage.

Beyond Brazil nuts, walnuts have shown promise for cognitive function. A study indicated that consuming 50 grams of walnuts at breakfast can enhance memory test performance in young adults. Research has also linked nut consumption to lower rates of diabetes and depression, as well as improved fertility and brain function in later life.

Despite these benefits, the average daily nut consumption in Britain is only 6 grams, leaving many individuals potentially missing out on essential vitamins, minerals, healthy fats, and protein. Nutritionists recommend a daily intake of approximately 30 grams, or a small handful.

Debunking the 'Fattening' Myth

While nuts are high in fat, studies, including those by the U.S. Department of Agriculture, suggest that not all of their calories are absorbed by the body. Approximately one-fifth of the fat in almonds and walnuts remains undigested due to their fibrous cell walls. Registered nutritionist Grace Kingswell explains that nuts are nutrient-dense, but the body does not utilize every calorie, lessening their impact on weight gain compared to other high-fat foods. The combination of protein, fiber, and unsaturated fats also helps manage hunger and stabilize blood sugar levels, potentially reducing the urge for subsequent snacks. A review of weight-loss trials even indicated that participants incorporating nuts into their diets sometimes experienced greater weight loss.

Specific Nut Benefits

Walnuts: Rich in omega-3 fatty acids, protein, and polyphenols, walnuts are often called 'brain food.' The University of Reading study demonstrated that a single serving could lead to faster reaction times and improved memory. Omega-3 fats are also believed to offer protection against Alzheimer's disease and stroke.

Brazil Nuts: These are exceptionally rich in selenium, a crucial nutrient for thyroid health and a potent antioxidant that is important for hair health. According to the NHS, one to two Brazil nuts can provide the full daily requirement of selenium for adults. However, experts caution against overconsumption, as excessive selenium can be toxic. Despite their saturated fat content, Brazil nuts also contain magnesium, copper, and phosphorus. Some research suggests a single monthly serving could lower cholesterol more effectively than statins. Public health nutritionist Dr. Emma Derbyshire notes that older adults, in particular, may benefit from incorporating Brazil nuts in moderation to address potential selenium shortfalls.

Almonds: Almonds are a significant source of fiber, with a 30-gram serving providing about 4 grams, which supports gut health, immunity, and digestion by promoting a diverse gut microbiome and aiding regular bowel movements. Adequate fiber intake also contributes to satiety, reducing the likelihood of overeating. Almonds are also abundant in vitamin E; a 30-gram portion nearly doubles the daily recommended intake for adults. Studies have explored links between higher vitamin E intake and reduced risks of heart disease, Alzheimer’s, and cancer, though further research is needed.

Pecans: Pecans may help reduce the risk of heart disease by lowering LDL ('bad') cholesterol levels. Research published in the journal Nutrients indicated that regular consumption of 30g to 60g of pecans daily was associated with lower LDL cholesterol. This benefit is partly attributed to their high vitamin E content, which helps prevent LDL cholesterol from becoming toxic and inflammatory.

Nut Butters and Consumption Tips

Nut butters, including almond, hazelnut, and pistachio varieties, have grown in popularity as perceived healthier alternatives to peanut butter, offering protein, fiber, and healthy fats. However, consumers are advised to check labels for added palm oil or sugar, opting for products that are 100% nuts, perhaps with a pinch of salt. Whole nuts retain slightly more fiber and may be more beneficial for blood sugar control. Due to their concentrated nature, it is easy to consume more calories from nut butters than from whole nuts.

Nutritionists suggest simple ways to incorporate nuts into the diet, such as pairing them with berries or oranges to enhance iron absorption or sprinkling them on yogurt for a complete amino acid profile. Activating nuts, by soaking and dehydrating them, may also improve nutrient bioavailability and digestibility. Given their low carbohydrate and high fiber and healthy fat content, nuts are an excellent snack option for individuals managing blood sugar or seeking to improve their overall diet. Experts emphasize the importance of returning to nutrient-dense whole foods and minimizing processed snacks.