Literal translation
I had to search a couple of these words…
Maintaining your body environment
To maintain the condition of your body fluids for normal metabolism and to assist digestion and absorption [amongst other things].
I can’t really think what the context for this would be… is it explaining about a healthy food or something?
眠れなくなるほど面白い
So interesting that you won’t get sleepy 
ダイエットにも健康にも役立つ!
Helpful for [as much as] your diet and your health!
最強の調理法まで徹底解説
We [go as far as to] thoroughly explain about the best way of cooking!
15時のケーキより21時のフルーツの方が太る!?
You put on more weight if you eat fruit at 9pm, than you do if you eat cake at 3pm?!
ごまはすらないと健康効果はゼロ!?
If you don’t have sesame seeds, then there is no impact on your health!?
トクホ"を摂れば、健康になる?"
If is good for your health if you take Tokuho (I don’t know what that is but judging by the picture it’s a health drink).
Summary
You only have to read this magazine and you’ll be thin and beautiful and have a super fun and happy lifestyle. Don’t read it and you’ll be a fat sweaty pig like Matt.
Whereas I just text him on Saturday nights when I’ve had a few too many to drink 