BORON
Boron deficiency in chicks (the kind with feathers) causes impaired calcium and energy metabolism, altered bone morphology, and an increased vitamin D requirement.³ These findings are consistent with the belief that boron in humans may be beneficial for optimal calcium metabolism and thus optimal bone metabolism.⁷ There is epidemiological evidence that arthritis is much more prevalent in areas of the world where boron levels are unusually low, suggesting that this may be a primary effect of boron deficiency.⁸ A reasonable amount of supplemental boron is 3 mg/day.