Because of the “strontium scare” of the 1950s, little follow-up was conducted on a study showing great effect with osteoporosis until nearly 30 years later. Stable strontium (nonradioactive) is nontoxic, even when administered in large doses for prolonged periods. It also appears to be one of the most effective substances yet found for the prevention and treatment of osteoporosis and other bone-related conditions.