For the issue of confounding to be a limiting factor. Well at least my theory is that you you reduce the food the food or the nutrients nutrient confounding. I by making dietary are give the example of this score that we develop a priori diet polity score which as i mentioned a little bit earlier in iowa was based on thirty four food groups in cardia that i've been working with more recently. It is forty six. We've just published in the past. Few months of three papers showing that that score is related to reduce cardiovascular disease to reduced incident diabetes mostly type two diabetes and to better maintenance of kidney function so that score actually we have Maybe twenty food groups that are rated positively so that would be fruit. It would be yellow vegetables. Green vegetables other vegetable is quite a few items for the bench tables nuts and seeds at think Yet to food groups coffee tea as beverages get up in those are all good and then we have another thirteen or adverse and. We have thirteen that. We couldn't decide instead. Well fill out the whole diet will give you a forty six but only the thirty three camp so you can look at all that and One thing that that score does is it forces people to eat from a variety of foods. Because he can only get four points for food. We put people into five categories. Either quintiles or foods are not very much zero group and then or tiles. And if you're at the top of that for a positively rated food you would get a get a score for and if you're at the bottom of that for an adversary related rated food you would get a for a but in order to get a good score you have to eat and get a good points from a variety of foods from either eating or not eating and then you still have some of your diet leftover so you can look in the other thirteen food groups.