Oils, fats and butters

Peanut oil

An opened reticulated peanut pod reveals two reddish-skinned seeds beside a separate pale-yellow prepared oil pool.
About this illustration
Peanut pod and seedsArachis Hypogaea Oil
The peanut pod opensArachis Hypogaea Oil is the peanut-oil story behind a botanical label. The seed inside the pod supplies the fatty material, while the prepared grade adds its own detail.Visual references: Seatons Arachis Oil

The peanut begins with a flower above ground and finishes its fruit below it. That unusual journey leads to a familiar oil with a less familiar label name: Arachis Hypogaea Oil.

Name on the ingredient listArachis Hypogaea Oil

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A quick answer

Arachis Hypogaea Oil is peanut oil, also called groundnut or arachis oil. It is a fatty oil obtained from the seeds and used for skin conditioning and as a functional carrier in fragrance preparations. Recognising the Latin name is especially useful for readers who need to identify peanut-derived ingredients.

The flower is only the opening scene

A peanut plant makes small yellow flowers above the soil. After fertilisation, a specialised structure called a peg grows downwards. Its tip enters the ground, where the developing fruit enlarges into the pod that protects the seeds.

Botanists call this underground fruiting geocarpy. You do not need the term to enjoy the image: the crop has a visible flowering chapter and a hidden fruiting chapter. What looks like an ordinary snack begins with a plant redirecting its developing fruit into the soil.

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A simplified flower-and-stem reference sends a peg into soil to a peanut pod, apart from the separate root system.
Flower above groundPeg · gynophorePod below groundRoots · separate structure
The plant’s below-ground fruitPeanut’s flowering chapter begins above ground, while the pod develops below it. The descending peg connects those two parts of the plant’s story.Visual references: Peper et al.2022 original PeanutScience peg/pod development direct, Kew Peanut primary morphology and underground fruit account indexed, Kew POWO ArachisHypogaea original Flora four-leaflet morphology primary indexed, HenryLamotte GroundnutOil current direct process description, Croda Seatons ArachisOil actual grade appearance cache plus fresh direct entry, COSMILE exact ArachisHypogaeaOil identity pinned manuscript source

A peanut belongs beside peas in the plant family

Despite the everyday name, the peanut is a legume rather than a tree nut. The shell around it is a pod; the edible kernels inside are seeds. The University of Kentucky’s crop publication describes this anatomy clearly, including the annual plant’s ground-level growth.

That distinction is useful for understanding the ingredient’s origin, though botanical family membership does not decide an individual person’s allergies. In the oil story, the important part is the seed inside the pod. The pod itself is a different material with a different possible destination.

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Empty reticulated pod pieces, thin reddish seed-coat fragments and one pale kernel sit in separate material groups.
Pod wall · shellSeed coat · skinKernel · seed
Shell, skin and seedThe pod wall, papery seed coat and inner kernel have different textures. The oil route follows the seed within those protective materials.Visual references: Peper et al.2022 original PeanutScience peg/pod development direct, Kew Peanut primary morphology and underground fruit account indexed, Kew POWO ArachisHypogaea original Flora four-leaflet morphology primary indexed, HenryLamotte GroundnutOil current direct process description, Croda Seatons ArachisOil actual grade appearance cache plus fresh direct entry, COSMILE exact ArachisHypogaeaOil identity pinned manuscript source

From kernel to a fatty liquid

Henry Lamotte describes peanut oil production by pressing, with further extraction when needed. The supplier gives the seeds a fatty-oil content of roughly 40–50 percent. This is a substantial stored fraction, rather than a few drops of aromatic essence distilled from flowers.

The resulting material is a fixed oil. It belongs in the same broad physical world as other plant fats, even when a finished cosmetic gives it a particular role. Its presence does not mean a product should smell of roasted peanuts: roasting and preparation are additional choices, not promises contained in the ingredient name.

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Peanut seeds lead through a closed pressing-stage marker to a closed prepared-oil reference canister.
Peanut seedsPressing · stage markerArachis Hypogaea Oil · closed reference
The documented oil preparationHenry Lamotte describes pressing peanut seeds for their fatty oil. The panorama follows that preparation without assigning a refining grade to the endpoint.Visual references: Peper et al.2022 original PeanutScience peg/pod development direct, Kew Peanut primary morphology and underground fruit account indexed, Kew POWO ArachisHypogaea original Flora four-leaflet morphology primary indexed, HenryLamotte GroundnutOil current direct process description, Croda Seatons ArachisOil actual grade appearance cache plus fresh direct entry, COSMILE exact ArachisHypogaeaOil identity pinned manuscript source

A mixture rather than a single fatty acid

Oleic and linoleic acids are prominent parts of the supplier’s fatty-acid description. The oil is therefore a mixture, rather than another name for isolated Oleic Acid or Linoleic Acid. Those separate ingredients can have their own labels and preparation histories.

Thinking in mixtures makes comparison easier. A maker selecting an oil works with its supplied composition and sensory properties. Two botanical oils can overlap in some fatty acids while remaining different materials. You can understand that useful relationship without memorising a table of percentages.

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A magnified peanut seed-coat edge contrasts with a separate shallow pale-yellow oil dish.
Peanut seed · surface detailArachis Hypogaea Oil · Seatons grade reference
A familiar nut in unfamiliar scaleA papery seed coat covers the pale kernel; the prepared oil is another material. Matching light brings their surfaces into view without turning the whole seed into an oil-composition map.Visual references: Peper et al.2022 original PeanutScience peg/pod development direct, Kew Peanut primary morphology and underground fruit account indexed, Kew POWO ArachisHypogaea original Flora four-leaflet morphology primary indexed, HenryLamotte GroundnutOil current direct process description, Croda Seatons ArachisOil actual grade appearance cache plus fresh direct entry, COSMILE exact ArachisHypogaeaOil identity pinned manuscript source

An oil can help carry a blend

The cosmetic ingredient inventory lists skin conditioning and a functional role in perfume oils or flavours. The latter is easy to misunderstand: a carrier or supporting ingredient in a fragrance preparation is not necessarily the ingredient supplying the main smell.

Imagine the distinction between the liquid holding a blend and the aromatic ingredients giving it character. This helps explain why an oil can appear near fragrance-related ingredients without being an essential oil. On a solid cosmetic label, the material still needs to be understood within that particular preparation.

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The name worth recognising for a practical reason

Arachis is another name you may meet when peanut oil is discussed, particularly in pharmaceutical references. Kew’s naming service links arachis oil with Arachis hypogaea. Learning that connection makes a Latin-looking label easier to recognise at a glance, even when the packaging has no peanut photograph.

If you have a peanut allergy, that identification is more useful than a reassuring natural-origin story. The European Scientific Committee on Consumer Safety has specifically examined peanut proteins in cosmetic oils. Refining and residual protein matter; the words on a general ingredient page cannot establish suitability for your personal allergy.

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A peanut-seed detail accompanies a full-name field, a single ingredient-reference slip and a conceptual solid bar.
Arachis Hypogaea OilPeanut oil · name referenceConceptual solid-product context
The exact name in the small printArachis Hypogaea Oil is the full label name for peanut oil. Keeping that exact name visible helps connect the small print with its familiar source.Visual references: Peper et al.2022 original PeanutScience peg/pod development direct, Kew Peanut primary morphology and underground fruit account indexed, Kew POWO ArachisHypogaea original Flora four-leaflet morphology primary indexed, HenryLamotte GroundnutOil current direct process description, Croda Seatons ArachisOil actual grade appearance cache plus fresh direct entry, COSMILE exact ArachisHypogaeaOil identity pinned manuscript source

Ask about the actual oil rather than its reputation

A helpful enquiry to a maker names the exact product and Arachis Hypogaea Oil, then asks about the supplied grade and relevant allergy information. That gives the company something precise to check instead of asking whether a botanical ingredient is universally gentle.

For other readers, the same naming habit remains valuable. You can distinguish the seed oil from the whole food, a hardened derivative or an aromatic blend. The peanut’s underground beginning is memorable; following its exact preparation is what turns that memory into useful label knowledge.

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Questions you might have

Does Arachis Hypogaea Oil mean peanut oil?

Yes. Peanut, groundnut and arachis oil are names associated with this material. Keeping that link in mind helps when a label uses the botanical form rather than the everyday food name, particularly if peanut-derived ingredients are relevant to your purchasing decisions.

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Does a fatty oil have the same composition as the whole peanut?

No. Oil production follows the fatty fraction rather than preserving the whole seed as a food. Other components and residual traces depend on preparation. That is one reason a food photograph alone cannot describe a cosmetic oil’s composition or establish personal allergy suitability.

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Does refining make it automatically suitable for someone with a peanut allergy?

This page cannot establish that. The European scientific opinion specifically considers residual peanut proteins and refining. If you have a diagnosed allergy, use personal medical advice and product-specific information; a broad ingredient description is not a clearance to try the product.

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One useful thought

Arachis means the peanut story. Remember the seed inside its underground pod, the fatty fraction selected as oil and the exact name that makes this ingredient recognisable.

Sources

References and further reading
  1. Development of an In-Tube Growth System to Study Pod-specific Responses of PeanutOriginal research authors / Peanut Science
  2. Peanuts: crop profileUniversity of Kentucky Cooperative Extension
  3. Groundnut OilHenry Lamotte Oils
  4. Arachis Hypogaea OilCOSMILE Europe
  5. Arachis oil: non-scientific name detailsRoyal Botanic Gardens Kew
  6. Revision of the opinion on peanut oil: sensitisation onlyEuropean Commission / SCCS