Inositol can have a natural relaxing effect on body and mind. It can help with depression, OCD (Obsessive-Compulsive Disorder) and panic type of mental disorders (Ref). The referenced study's successful tests were performed on adults using daily inositol doses of 12g to 18g for 4 to 6 week periods.

Natural sources of inositol
Inositol is available from both plant and animal sources. Natural sources of inositol include wheat germ, brewer's yeast, bananas, liver, brown rice, oak flakes, nuts, unrefined molasses, vegetables, and raisins. Available naturally from plant and animal sources, the plant form of inositol is combined with six phosphates and is known as the "anti-nutrient" phytic acid. Most dietary inositol is in the form of phytate, a naturally occurring plant fiber that is believed to possess antioxidant properties. The action of the intestinal bacteria liberates inositol from phytic acid, which is found in citrus fruits, nuts, seeds and legumes, wheat germ, brewers yeast, bananas, liver, beef brains and heart, whole grains such as brown rice, oat flakes, unrefined molasses, raisins and vegetables such as cabbage. In plants, phytic acid binds with minerals, such as iron and calcium, and interferes with their absorption. Mammals, including humans, can also biosynthesize inositol from glucose and patients with diabetes mellitus, chronic kidney failure, and multiple sclerosis (MS), exhibit impaired production.

Pure Inositol can also be found in tablets or liquid form.

More Inositol info here.