I am reminded of the Woody Allen film, whichever one it was, where he woke up in the future, and was given all the things that they thought were unhealthy in his time, but were considered healthy now.
I can vouch for dark chocolate, myself! I just tune out all "health studies" now. The basics are the same, and that's where everyone falls down in their quests for the miracle compounds of the week like carotinoids, resveritrol, vitamins a through z, and many others.
I changed my blood pressure just by letting go of the old "drink 8 glasses of water a day", and only drinking when I'm thirsty, and I dropped my cholesterol without even exercising, and without "diet"ing, just by changing my diet in a basic way; cut way back on fried foods and red meat, and eating mostly veggies with just a bit of low-fat white meat like turkey or chicken.
Now I'm also bicycling on all those little errands that used to be done by car. I find that many little trips to the grocery store on a bike works just as well as letting the list grow to do all at once via the car. My other little pet habit now, is never use "electric" or "automatic" when manual gets the job done. When in the car, I park quickly, at the back of the lot, and walk. When I need to open a can, I use a hand-crank can opener from the 1960's. I trim the edges with hand clippers rather than a weed-whacker. I'm eschewing (hope I spelled that correctly) much of the "labor saving" convenience of the modern world, because the convenience was killing me!

(and as insult to injury, it was costing me energy money, to pay for the privilege of killing myself!)