@okabe_rintarou I honestly can't give great diet recommendations. Eat fresh, avoid preservatives, avoid GMO food as much as possible (it's hard these days), get organic when you can. The outer edges of the grocery store have the "real food," while the shelves in the middle are where the super-processed slop is that you should generally avoid if possible. Unfortunately, the "real food" is becoming more and more expensive, so just do your best.

I haven't heard of the lion diet, so I can't comment on it. The thing I always keep in mind when looking at diets is that different people have different needs. There are people who live on almost nothing but rice, others who live on almost nothing but fish, still others who live on almost nothing but frozen dinners. If you have the will to try it, you should give it a shot and share your experience. Our bodies are highly adaptable, and everyone is different, so what may be a great diet for one person may be awful for another.

For supplement timing, there are some that work better on an empty stomach and others that are best with food. Generally, oil-soluble supplements like D3 and fish oil go best with food and are absorbed by your system much better that way. More "specialized" supplements are better on an empty stomach, like NAC, PQQ, or iodine. There are some that will make you drowsy and are best taken before bed; magnesium glycinate is a great example of a natural sleep aid that is also a highly valuable mineral that most people don't get enough of and improves general well-being. Vitamin and mineral packages from good manufacturers will give a recommended time of day and whether or not to take it with a meal.

You also have to be careful about taking too many supplements at the same time, as some can interact in your stomach and cause a little science experiment that results in a Diet Coke + Mentos effect. It'll feel like acid reflux, and it's not comfortable. NAC is one of the biggest offenders of this for me, so I have to take it on its own. I've also had issues with ashwagandha.

Also, avoid supplements (and foods in general) that have preservatives, especially sodium benzoate. You'll see it most often in liquid supplements like fulvic acid. Sodium benzoate interacts with vitamin C to form benzene, a carcinogenic compound.