Product Research report

I've been looking for the multi vitamin, probiotic, and nutrition supplement report that tested certain popular brand such as GNC,puritan's pride, nature's way etc. But It seems like only avaliable source is consumerlab which you have to be subscribed to access the report. I'm a college student and I have limited money so I'm looking for non-profit organization that did the research on these brand name products and the reports. Can anyone help me to find such group or reports? Thanks in advance