How do I track beer/ale reliably?

I've found most of the beer information on here to be wrong; 0 Carbs, fat and protein? No way. I would update the entries myself but I've had little luck finding the right information online.

Basically, I've been having a few pints on the weekend and I've continued to lose weight at a steady rate, but I would like to be able to account for the beer I'm having more reliably. Anybody found a good source of calorie/nutrition information for ales? There's a myriad of different drinks out there and I've yet to find a way of knowing what's in them.

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