Oat straw may boost hormones that stimulate bone cell growth and thus help prevent or treat osteoporosis, according to the University of Maryland Medical Center, although it notes that research is lacking. In osteoporosis, bones gradually lose density and become weak and brittle, making the individual susceptible to fractures. The condition is most common in women after menopause. It is rich in calcium and synergistic minerals and vitamins needed for building bones. The primary chemical constituents of Oat Straw includes saponins, flavonoids, starch, alkaloids (trigonelline, avenine), steroids, calcium, iron, B vitamins, lysine, and methionine. To make hot Tea: add 1 tsp. or 1 tea bag of straw to 1 cup of hot boiled water for 10-15 min. Add milk and sugar to taste.