I'm not too familiar with reading the OAT results but noticed Vitamin C is on the low side?

I wouldn't worry about your Vitamin C result. Plenty of people have low Vitamin C when they run the OAT but they aren't actually deficient. You pee out Vitamin C very quickly after it enters the blood. So even if you take vitamin C the night before, it's pretty much entirely gone in the morning when you take your urine sample. So then Vitamin C appears low for most people.