Sage is a common spice used in kitchens all over the world. The Latin name, Salvia officinalis, means "to save," reflecting the curative properties the herb was believed to possess. Sage is a traditional topical treatment for graying hair, and the herb may promote new hair growth, according to the University of Maryland Medical Center. Sage has antibiotic, anti-allergic and antiseptic properties and is a source of magnesium, zinc, potassium, and vitamins B and C. Before using sage as a beauty treatment, consult your doctor to diagnose the cause of your thinning hair, as it could be the result of a health condition.

Use concentrated sage tea as a hair rinse. Pour 1 cup of boiling water over 1 tbsp. of dried sage leaves. Allow the mixture to cool and strain through a coffee filter to remove the sage leaves. Wash and rinse your hair as usual, and then pour this sage tea over your scalp as a final rinse.

Apply sage tincture as a spot treatment for thinning hair. After washing and rinsing your hair, apply one drop of sage tincture to problem areas on your scalp. Massage the sage gently into your scalp while your hair is still damp. Discontinue if the alcohol in the tincture causes scalp irritation.

Rub a mixture of sage tincture and olive oil into your scalp as a nightly treatment. Add three or four drops of sage tincture to 1 tbsp. of olive oil. Massage the oil mixture into the scalp where the hair is thinning until it is well-absorbed. Wash your hair as usual in the morning.

Infuse jojoba oil with sage to create an alternate nightly scalp treatment. Jojoba oil is a traditional Native American treatment to promote hair growth. Place 1 cup of sage leaves with 2 cups of jojoba oil in a blender. Blend at high speed for three minutes or until the mixture is liquefied. Store the oil in a glass jar in the refrigerator and use it as a nightly scalp treatment.