Just because they look and taste like nuts, that doesn’t mean they are. Surprised? Well, you and most of the world wouldn’t be wrong to assume it, but the truth is more complex. In a nutshell, peanuts are not nuts. Believe it or not – they are actually legumes.
Peanuts are part of the legume family, which includes beans, lentils and chickpeas. While tree nuts like almonds and pecans grow on trees, peanuts grow underground in pods. This is why peanuts are classified as legumes rather than tree nuts.
… peanut allergies are often grouped with tree nut allergies due to the similar immune responses they can provoke.
Unpacking the Truth
In the botanical sense, nuts are hard-shelled fruits that do not split open to release their seeds, like acorns. However, peanuts grow in pods that split open, similar to other legumes like peas and soybeans. The key difference is in their origin and growth – peanuts belong to the Fabaceae family, whereas tree nuts come from different plant families such as Fagaceae (for acorns and chestnuts) or Juglandaceae (for walnuts and pecans).
Part of the confusion comes from how we use peanuts in cooking. They share many characteristics with tree nuts – they’re crunchy, nutrient-dense and full of healthy fats. Plus, they’re commonly used in snacks.
Another reason is how we label foods. Just like tomatoes are considered vegetables in cooking but are technically fruits, peanuts are called ‘nuts’ for culinary purposes because of their similar texture and uses. While they don’t meet the botanical definition, the word ‘nut’ is mostly used by association.
In a Nutshell
Peanuts belong to a different plant family, but are nutritionally comparable to tree nuts. They are rich in protein, healthy fats, vitamins and minerals. In fact, peanuts are an excellent source of biotin, niacin and vitamin E. They also contain antioxidants like resveratrol, which has been linked to heart health.
Peanuts can be a good substitute for tree nuts, especially for those wanting to save on cost – but if you have a nut allergy, you might think twice…
Even though they are legumes, peanut allergies are often grouped with tree nut allergies due to the similar immune responses they can provoke. This is why people with a peanut allergy are advised to avoid peanuts and tree nuts, despite their botanical differences.
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