Peanuts

Peanuts: Nutrition, History and Complete Guide

The peanut (Arachis hypogaea) is botanically a legume — a member of the bean and lentil family — but is nutritionally and culinarily classified with tree nuts due to its similar composition: high in fat and protein, low in water, dense and calorie-rich. It is unique among legumes in that the fertilised flower bends downward into the soil after pollination, where the seed pod develops underground — earning it the alternative name "groundnut." Peanuts were domesticated in South America, in what is now Bolivia and Peru, at least seven thousand years ago, and were a central food of pre-Columbian civilisations from the Inca Empire to Mexico. Spanish and Portuguese colonisers distributed peanuts around the world through the sixteenth century — they were brought to West Africa, where they thrived and became deeply integrated into local food cultures (groundnuts are fundamental to West African cooking), and to East Asia, China, and India, where they became enormously important crops. Today, China is the world's largest peanut producer, followed by India. In the United States, peanuts have been associated with George Washington Carver, who developed hundreds of uses for the peanut plant in the early twentieth century and championed it as a crop for the American South. Peanut butter — developed in its modern form in the late nineteenth century — became one of the defining foods of American culture.

Nutritional Value of Peanuts

Peanuts provide 567 kcal and 25.8 g of protein per 100 g — the highest protein content of any commonly consumed nut or legume in this category — with 49.2 g of fat and 8.5 g of fibre. The fat is predominantly monounsaturated (oleic acid) and polyunsaturated (linoleic acid), with modest saturated fat. Peanuts are an outstanding source of niacin (B3) — a single 30 g serving provides approximately a third of the daily niacin requirement. They also provide folate, vitamin E, thiamine, B6, phosphorus, magnesium, manganese, copper, and zinc. Resveratrol — the same polyphenol associated with red wine — is present in meaningful quantities in peanut skin.

Health Benefits of Peanuts

Despite being technically a legume, peanuts provide the same cardiovascular benefits as tree nuts — regular peanut consumption is associated with reduced LDL cholesterol, improved blood lipid profiles, and reduced cardiovascular risk in multiple large studies. The PREDIMED study found peanuts as effective as mixed tree nuts in reducing cardiovascular risk. Peanuts are one of the most common food allergens — peanut allergy affects approximately 1–2% of children in Western countries, can be severe and life-threatening, and rarely resolves with age. Early introduction of peanut-containing foods (in appropriate forms) in infant weaning has been shown to reduce the development of peanut allergy — a significant shift in guidance that occurred following the LEAP trial results in 2015. Peanuts are highly affordable and widely available, making them one of the most nutritionally important and accessible foods globally.

How to Use Peanuts

Roasted peanuts are excellent as a snack, in trail mix, and scattered over Asian salads and noodle dishes. For peanut sauce: blend roasted peanuts (or peanut butter) with soy sauce, lime juice, garlic, ginger, sesame oil, and chilli for a classic Southeast Asian dipping sauce perfect for satay and spring rolls. West African groundnut stew — peanuts simmered with tomatoes, onion, and chicken or vegetables in a rich sauce — is one of the most satisfying and nutritious one-pot dishes imaginable. Ground peanuts are essential in many African and Asian spice pastes and chutneys.