I purchased Calciven for my mother. She had been experiencing issues with her bones as she has aged. She tried quite a range of products over a number of years, none of which seemed to make much difference. She noticed my use of Nutreance products one day, commenting on the fact that they are whole food vitamins. I explained to her the quality and authenticity that Nutreance provides. She decided she'd try their Bone Strength supplement. I proceeded to purchase two bottles for her and she began supplementing with them immediately upon arrival. Within a month, she noticed quite a difference in her joint pain. By the time she finished her first bottle, she said her pain was lessened by 75%. She is thoroughly pleased with the effectiveness of this supplement and recommends it strongly!