Patent to treat secondary hyperparathyroidism with 30 ng Vitamin D Created June 2018 On this page Method of treating and preventing secondary hyperparathyroidism 9,913,852 OPKO, > 30 ng/mLSee also Vitamin D LifeWho said vitamin D could not be patentedModified release active Vitamin D (calcifediol ) for those with poor Kidney function (USD 10,000 per year) – April 2015 Tags: Patent Thyroid and parathyroid