Peanuts

Availability and types of the ingredient peanuts, roasted

Peanuts originate from South America, where they were cultivated by people thousands of years ago. It is believed the plant was first found in regions like present-day Peru or Brazil. Today peanuts are grown worldwide where it is warm and not too cold – in a climate comparable to a long, sunny summer.

Important growing regions include:

These countries cultivate peanuts in large fields, similar to cornfields. Because peanuts mature underground on the plant (they grow in pods beneath the soil), farmers need good soils and enough time for drying.
There are several well-known peanut varieties that differ in shape, size and flavor. You can compare them to apple varieties: some are better for baking, others taste especially good raw. Major varieties include:

Each variety has its own character, like different potato or tomato varieties.
Besides varieties, there are many formats in which roasted peanuts can be found in stores. Here is a simple overview:

Peanuts are available year-round in supermarkets because they store well. Kept dry and dark they remain fresh for a long time, similar to nuts or dried fruit. One important note: some people are allergic to peanuts. For them even small amounts can be dangerous. Therefore packaging often carries a warning.

In short: roasted peanuts originally come from South America, are now grown worldwide and are available in many varieties and formats. Whether large or small, salted or chocolate-coated — there is a roasted peanut to suit every taste.

Peanuts, roasted are the dried seeds of the plant Arachis hypogaea, which acquire a characteristic aroma, altered texture and modified chemical properties through thermal treatment. Roasting is performed industrially or artisanally and affects both sensory characteristics and shelf life as well as the nutritional properties of the nut.

Chemical composition and nutritional values: Roasted peanuts consist mainly of fat, protein and fiber. Typical macronutrient values per 100 g are approximately 550–600 kcal, 45–55 g fat, 20–30 g protein, 10–20 g carbohydrates and 6–10 g fiber. The fat is predominantly monounsaturated (oleic acid) and polyunsaturated (linoleic acid), supplemented by small amounts of saturated fatty acids. Functional micronutrients include niacin (B3), folate, vitamin E (tocopherols) and minerals such as magnesium, phosphorus and potassium. Phytochemically, peanuts contain secondary plant compounds such as phenols, flavonoids and the stilbene resveratrol, which may exhibit antioxidant activity.

Proteins and amino acid profile: Peanut protein is composed mainly of storage proteins (Ara h family), including important components such as Ara h 1, Ara h 2 and Ara h 3. These proteins supply essential amino acids but are limited in sulfur-containing amino acids (methionine, cysteine). Thermal treatment alters protein structure: partial denaturation can improve digestibility, while Maillard reactions can create cross-links that make certain amino acids less available.

Processing methods: There are several roasting methods:

Thermal reactions during roasting include the Maillard reaction, which forms aroma compounds such as pyrazines and creates the characteristic roasted note. At the same time, reducing sugars and amino acids can lead to by-products; the content of heat-sensitive vitamins may partially decrease due to exposure to high temperatures.

Food safety and storage: An important safety issue is aflatoxins, secondary metabolites from Aspergillus species that can develop under unsuitable storage conditions. Roasting does not completely eliminate aflatoxin levels, so control of raw material and hygienic storage conditions are crucial. Roasted peanuts are susceptible to oxidation of their oils; light, oxygen and heat accelerate rancidity. Cool, dry and preferably airtight storage extends shelf life.

Health aspects: Peanuts provide valuable protein, unsaturated fats and micronutrients and are associated with beneficial effects on cardiovascular risk markers when used as part of a balanced diet. At the same time peanuts are a common cause of severe IgE-mediated food allergies, which can trigger anaphylactic reactions at low doses. Processed products with peanut contact are also problematic for sensitive individuals. Energy and fat content should also be considered, particularly in low-energy diet planning.

Overall, roasted peanuts are a nutrient-dense ingredient with characteristic physicochemical properties, whose nutritional benefits and risk factors should be managed through quality assurance and appropriate processing.