When comparing the cost of SOLIUS to vitamin D supplements, there are a few things to consider. It's true that vitamin D supplements cost less than SOLIUS, but it's important to remember that comparing SOLIUS and supplements is like comparing apples and oranges. When you invest in SOLIUS treatments you're investing in your short and long term health by optimizing your body's natural, efficient method of vitamin D production. The powerful spectrum of light we use is also responsible for stimulating a whole host of other beneficial biomolecules, regulated by the body. With vitamin D supplements you're paying for a lot of uncertainty. Studies have found that supplement doses are often way off from what the label claims, not to mention you have to worry about where the ingredients were sourced and the quality of what you are putting in your body. Why worry about all this when you can give your body what it naturally evolved to need? The cost of SOLIUS is different because our product is different, and we believe this difference is well worth it.