Yes, henna thickens hair and it is good for hair loss. Henna has been used since ages to thicken hair and give a great body to it. It also gives shine and a touch of color along with the bouncy effect you always wanted. Soak henna powder in water overnight and apply this paste to your hair in the morning. Let it stay for about an hour and then rinse with normal water. Follow this procedure every month to get dense and soft hair.