Maintaining a healthy diet, reducing stress, using supplements and exercise help grow a thicker beard. Using minoxidil on the face and shaving does not make a beard grow thicker.
Eat an ample amount of healthy foods, especially protein, to grow a thicker beard. Keep the body hydrated with water to optimize body functions to enable it to grow the thickest beard possible. Stress causes hair loss; use meditation and stress-reduction methods to stay calm. Take 2.5 milligrams of biotin daily along with vitamin B1, B6, B12, flax seed oil, vitamin D and beta-carotene to promote a healthy beard. Exercise to increase blood circulation and testosterone levels, which produces a thicker beard.