Thiamine & folate value of store bought OJ?

[Bluemachine]

Does anyone have any idea as to how pasteurization & a lack of "freshness" would effect the amount of these vitamins present in store bought carton or bottled OJ? These are two b vitamins which I often come up short on, on paper. Cronometer seems to think there are zero b vitamins in branded OJ but given the fact there was a period where I ate exclusively beef, carton OJ & milk chocolate for a period of over a year I doubt that to be the case - I wasn't in great health but were I getting near zero thiamine or folate I doubt i'd of barely survived ??

I have recently been supplementing with b vitamins(high b1 and complex) which went great initially but I feel some might be doing more harm than good now