That "medicine" cabinet is nearly identical to ours. Another addition we use is not for the faint of heart, but does seem to work for us. If one of the kids starts to get sick or we have know exposure, we will mince a fresh garlic clove and eat it. It can be unpleasant, but does seem to work as a natural anti viral for us.

I spend plenty of time outside, especially in the summer and have been shocked how hard it is to maintain vitamin D levels. On my annual blood work, the reference intervals for vitamin D are from 30-100 ng/ml. This is a very large range, but the low end of the scale is where I would typically fall without supplementation. While the 30 ng/ml is clinically in range it might not be optimal for health.