Hello Lucy , thank you for your 5-star review and feedback about our Vitamin D3 and K2 Combo. We're delighted to hear about your positive experience with our supplement, particularly regarding the improvement in your blood test results and reduction in pain levels. Your observations about the effectiveness of our Vitamin D3 are particularly meaningful, as they validate our commitment to creating supplements that deliver tangible results. Regarding your comment about the K2 bottle size, this difference is due to the fact that K2 is light-sensitive. It is best kept in smaller batches to reduce its exposure to light, every time it is opened. Your experience with the measurable benefits of our supplement aligns perfectly with our mission to provide premium nutritional solutions that make a real difference in our customers' lives. Regards, VitaBright.