Alfalfa oil: what's actually in a topical product

"Alfalfa oil" almost always means a carrier-oil infusion or cosmetic extract made from the plant, not a steam-distilled essential oil — alfalfa isn't a significant source of aromatic oil the way lavender or peppermint are, so a true Medicago sativa essential oil isn't something the major essential-oil suppliers sell. What research exists on alfalfa and skin is laboratory cell-culture work, not a human topical trial.

What "alfalfa oil" is

Most products sold as "alfalfa oil" are an infused oil — alfalfa leaf or seed steeped in a base oil, like sunflower or olive, to pull out fat-soluble compounds — or a cosmetic "extract" made a different way and added to a lotion, cream or serum. That's a different thing from an essential oil, which is a concentrated, steam-distilled or cold-pressed aromatic compound; alfalfa doesn't yield enough aromatic oil for that process to be commercially practical, so a true "alfalfa essential oil" label is unusual. See what is alfalfa for how the plant's parts differ more broadly.

What the research actually tested

A 2020 laboratory study extracted compounds from alfalfa herb and seed and tested them directly on two types of human skin cells grown in a dish — fibroblasts and keratinocytes — rather than on a person's skin. The extracts showed antioxidant activity (scavenging free radicals in a standard lab assay) and increased cell proliferation in that dish-based system. That's real laboratory evidence about compounds alfalfa contains, but it's not a human trial: nobody applied an alfalfa oil or extract to a person's skin and measured a skin outcome, so there's no research showing what a topical alfalfa product actually does on a person.

Questions people ask

Does alfalfa oil benefit skin?

No human trial has tested this. Laboratory research on isolated skin cells found antioxidant activity and increased cell growth from alfalfa extracts, but that's a dish-based finding, not evidence about applying alfalfa oil to skin — a lab result on cells in a culture plate doesn't automatically predict what happens when a product is applied to intact skin on a person.

Is there such a thing as alfalfa essential oil?

Not in the conventional sense. Alfalfa isn't an aromatic plant with enough volatile oil to steam-distill commercially, so what's sold as "alfalfa oil" is typically an infused carrier oil or a cosmetic extract, not a true essential oil.

What does "spraying alfalfa for weeds" mean?

That's an agricultural topic — herbicide application on alfalfa hay fields to control weeds in the crop — unrelated to alfalfa oil as a topical or cosmetic product.

Is alfalfa oil safe to apply to skin?

No human safety trial has specifically tested topical alfalfa oil or extract. Whole-plant carrier-oil infusions are a common, generally mild cosmetic ingredient category, but "generally mild" isn't the same as tested — anyone with sensitive skin or a known plant allergy should patch-test a new product before wider use, the same as with any new topical ingredient.

Related: alfalfa side effects and how to choose a good alfalfa.