Just to give you some examples of barriers for us, we have a lot of training in different kinds of natural health products, and one of the barriers is access to the substances that we have training in.
I'll give you three examples. The first two examples are about access to the doses that we know are safe and effective. One of them is for vitamin D, which is really the Michael Phelps of the vitamin world. We've learned a lot about vitamin D in the last little while. Currently, the upper limits are 2,000 international units. The science is suggesting that you need to go higher in order to have a therapeutic effect, but you need to go higher with a person who's well trained and knows the dosing. Yes, we could have our patients take handfuls of 2,000 international units or less, but really, it's best to be able to have access to a larger dose.
Something that goes along with this is that we're now starting to learn that vitamin D is related to vitamins A and K, and we're also restricted as to the amount of vitamin K we can use. So even though we do understand the interaction and vitamin K has really been shown to be a very, very important vitamin, we just can't get access to it with Health Canada.
So that's the dosing. Something such as L-carnitine is an example of one that is safe, but we don't have access to it because it's on schedule F. I'll just give you an example of the barriers and how frustrating they are, I work in a medical building that's owned by a medical doctor. We share patients. A patient went to him to ask about L-carnitine. The medical doctor said that he really didn't know much about L-carnitine, but he told the patient to see the naturopathic doctor downstairs. The patient came to see me and I was able to tell him about L-carnitine, the doses, the side effects, and what he needed to look for. Then, at the end of the conversation, I had to tell him that it was on schedule F and I couldn't do anything about it, that he'd have to go back upstairs to see the medical doctor to get a prescription for it. So here's a way that—