Thicken hair with a sandalwood oil hair mask

British researchers found that treating hair with sandalwood oil helps keep follicles in an active growth phase, increasing hair growth hormones in the scalp by 30% in just six days. Pairing it with castor oil, which is packed with hair-plumping fatty acids, gives tresses an instantly thicker and fuller appearance.

■ TRY IT! Mix

4 drops of sandalwood essential oil and 2 Tbs. of castor oil. Rub into damp hair from roots to ends. Let sit 20 minutes; rinse.