Some of the (?indicative) screengrabs on your website also seem to suggest that your app will advise a 'dietary source' when some level is low - is this actually your intention?

Because it's far from obvious that dietary supplementation of X is going to have a causal link to a reduction in problem Y, where Y is associated with low levels of X.

For example, a low ferritin isn't always best treated with iron supplements - certainly they won't treat the bowel cancer that could be the underlying cause.