A while ago I came across videos by Dr. Michael Greger. I was impressed by his ability to produce these 3-4 minute features every day. The science was sound and the production values high. I started to watch every day and it soon became clear that there was an agenda here. Every video either spoke about the benefits of some plant component in the diet or the harm caused by some chemical in animal products. It turns out that Dr. Greger has swallowed the vegan philosophy hook, line and sinker; not that there's anything wrong with that. He promotes veganism with religious fervour and has forged a career speaking on health issues, including guesting on the Dr. Oz Show. Surely that is the ultimate recognition of scientific expertise! He also was an expert witness in on Oprah's behalf when she was sued by meat ranchers for defaming hamburger. Dr. Greger claims to donate all profits from books and speaking engagements to charity, certainly a noble commitment.
You will never see Dr. Greger refer to a study that shows anything positive about meat, but you will see plenty of studies that point out the pitfalls of consuming animal products. While there is some zealotry here, the studies that Dr. Greger enthusiastically talks about are from respected journals and merit our attention. I think his videos are worth watching, but keep in mind that there is some cherry picking of data. Of course that doesn't mean the cherries he picks are rotten; they're fine. Here is some of his work; you can also sign up for a free subscription to his daily videos.