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It’s Monday, everyone! And that means another Primal Blueprint Real Life Story from a Mark’s Daily Apple reader. If you have your own success story and would like to share it with me and the Mark’s Daily Apple community please contact me here. I’ll continue to publish these each Monday as long as they keep...

Research of the Week Not everyone responds to blue light at night the same way. How a keto diet (possibly) affects muscle mass. High dose metformin blunts muscle gain. Your retinal mitochondria are key to blue light’s effect on eye health. Despite the power of livestock ownership to improve human nutrition in developing countries, very few “experts” take this into...

Powerlifter Evan Kardon was hoping for a big deadlift during his birthday workout, but his plans were thwarted by one angsty gym-goer who was not a fan of Kardon's use of chalk. The fellow gym patron was so bothered that he decided to silently prevent Kardon from deadlifting. According to the post's caption, the unidentified protestor...

It’s bad enough dealing with your period once a month — the cramps, the mood swings, the ruined underwear… But twice? As it turns out, getting your period twice in one month isn’t all that abnormal. But if you're part of that (pretty unlucky) group, know this: “Irregular bleeding can have different implications depending on age,...