Hi Bonnie, glad you reached out!
Our published and peer-reviewed studies measured increases in bone density specifically. However, many customers have let us know that the vitamins & minerals in AlgaeCal benefited their arthritis as well! We highly recommend a good quality fish oil for arthritic pain. For example, our Triple Power Fish Oil provides anti-inflammatory and antioxidant ingredients (fish oil, turmeric, and astaxanthin) shown to help manage the pain and stiffness associated with arthritic conditions! You can learn more at the AlgaeCal website. Hope this helps and let us know if you have any other questions!
- Jenna@ AlgaeCal