St. John's Wort (Hypericum perforatum)



Updated 17 January 2024

Botanical characteristics

  • Kingdom: Plantae 
  • Division: Magnoliophyta 
  • Class: Magnoliopsida 
  • Order: Theales
  • Family: Clusiaceae 
  • Genus: Hypericum
  • Part used: Flowering plant
  • Country of origin: Metropolitan France, Bulgaria

Precautions for use

Caution! St. John's Wort essential oil is not recommended for children under 6 years of age, pregnant or breastfeeding women.

Not all forms of use are approved.

People with asthma should seek medical advice before using this essential oil.

In terms of risks of use, St. John's Wort essential oil can be irritating, so it should be diluted to 20% in vegetable oil for application to the skin.

Finally, it has an allergenic risk.

Other precautions

Warning:

  • People with asthma should consult a doctor before using this essential oil.

Cutaneous use:

  • St. John's Wort essential oil can be irritating to the skin when applied neat.
  • It is therefore necessary to dilute it by 20% in vegetable oil before use (20% essential oil and 80% vegetable oil).

Allergenic components:

St. John's Wort essential oil contains an allergenic biochemical component:

  • Limonene (≤ 0.5%)

Note: It is best to test the essential oil before use (two drops on the crease of the elbow for at least 24 hours to check for a reaction).

Authorised users

 Adults and adolescents

 Children under 6 years

  Pregnant and breastfeeding women

 Pregnant women younger than 3 months

 Infants under 3 years old

How to use

 Inhalation
 Cutaneous
 Oral
 Diffusion

Risks of use

 Cortisone-like
 Skin irritation

 Allergic

Properties

  • Insecticide
  • Expectorant, anti-catarral
  • Cicatrizant
  • Anti-inflammatory (mucous membranes) 
  • Anti-infective (limited), antiseptic 
  • Anti-traumatic

Indications

Directions for use/usual dosage

  • For joint or muscle pain, dilute this EO in St John's Wort macerate and massage into the painful area.
  • For itching or redness, apply 1 to 2 drops topically after dilution in an EO maceration.
  • To relieve depression, apply 1 to 2 drops of EO to the solar plexus and under the soles of the feet.