Leek

Contains organic disulfide compounds, similar to garlic and onion. High potential for skin irritation and sensitization.

May inhibit platelet aggregation. Use orally with caution in individuals on anticoagulants.

Dermal use not recommended for most cosmetic purposes. Strong aroma, characteristically allium.

No clear pregnancy data, avoid use.

Allium porrum is a cultivated species derived from Allium ampeloprasum, used as a culinary herb since antiquity.

The oil is rare and produced on a small scale. Primarily used as a food flavoring, not in cosmetics.

Family Liliaceae (or Amaryllidaceae under newer classification), same family as onion, garlic, and shallot.

Listed in for database completeness in aromatherapy. Cosmetic applications are essentially nil.