A customer pointed me to this article, Place Mushrooms in Sunlight to Get Your Vitamin D. A very interesting and useful article indeed. Vitamin D deficiency is common in the US, about 60% of us. That is odd since it only takes about 15 minutes of sunlight a day to get all you need for 24 hours, but still, as we shun UV due to improperly substantiated claims by the dermatology industry, more and more Americans are D deficient. Very few foods have significant amounts of vitamin D, but mushrooms do. It would appear that growing them with a couple days worth of sunlight (or a few hours worth of high intensity UV) dramatically increases the D content. Studies have already shown that vitamin D pills are all but useless, as you body just pushes out the synthetic versions, but this is the real deal. I’ve already had one customer buy lamps specifically for this purpose, the Universal UV. This could lead to some interesting things in the future.