Chris Kresser (formerly The Healthy Skeptic)--Absolutely my favorite ancestral blog. Kresser is crazy smart. His posts are thoroughly researched and he isn't afraid to change his mind (and his recommendations) in light of new evidence. chriskresser.com/
Mark's Daily Apple--I love this blog. Sisson covers a wide range of topics, so there is something for everyone. He posts regularly and he has a great conversational writing style. www.marksdailyapple.com
The blogs listed below can be a bit spammy at times with lots of giveaways, sponsored recommendations, blog carnivals, etc. But, I do find good recipes and posts on them often enough to keep them in my Google Reader:
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