Aromatherapy Carrier Oils and Dilution

Question 1

Which carrier oil has the highest oleic acid content and is known for its exceptional skin penetration and moisturizing properties?

Accepted Answer

Olive oil

Answer

Olive oil has a very high oleic acid content (55–83%) which contributes to its deep moisturizing and skin-softening properties.

Question 2

Jojoba 'oil' is technically classified as which type of substance?

Accepted Answer

A liquid wax

Answer

Jojoba is technically a liquid wax ester, not an oil, making it extremely shelf-stable and resistant to rancidity.

Question 3

Which carrier oil is cold-pressed from grape seeds and is known for its light texture and high linoleic acid content?

Accepted Answer

Grapeseed oil

Answer

Grapeseed oil is light, non-greasy, rich in linoleic acid, and is a popular choice for massage and blending due to its neutral scent.

Question 4

What is the primary concern when using a carrier oil with a short shelf life, such as rosehip seed oil?

Accepted Answer

Rancidity, which can irritate skin and degrade essential oil quality

Answer

Carrier oils high in polyunsaturated fatty acids like rosehip oxidize quickly, leading to rancidity that can irritate skin.

Question 5

Which carrier oil, derived from a nut, is particularly recommended for dry, mature, and sensitive skin types due to its emollient properties?

Accepted Answer

Sweet almond oil

Answer

Sweet almond oil is rich in oleic and linoleic acids, making it highly emollient and gentle enough for sensitive and mature skin.

Aromatherapy Practice Test