Don’t mistake this herb for the caffeine-containing kola nut. Gotu kola (Centella asiatica), also known as Indian or Asian penny wort, contains no caffeine. It is in the same plant family as carrots and parsnips. Because it helps rebuild energy re- serves, it has become known as “food for the brain.” In traditional medicine, it’s used to increase mental and physical strength, combat stress, and improve re- flexes. Recent studies have shown that it improves circulation by increasing the flow of blood throughout the body and strengthening veins and capillaries. A phar- macological review of its component chemicals suggests there is some scientific basis for claims that it has antidepressive properties and can help improve concentration and attention span. It is typically taken as an extract or in capsule form; fol- low the label’s directions. Pregnant women should not use this herb, nor should anyone with an overactive thyroid condition.