How to choose isotonic water

tea bad for sport?

First of all, please don't misunderstand "healthy" ^^ I don't mean unhealthy and maybe only healthy in moderation.

I started regular training a few months ago and of course had to stop drinking such junk as energy drinks full of sugar, etc. When I was out with a friend, I did treat myself to something; this time Monster Energy Rehab. I immediately noticed the ingredients as one of the little (very little) clues about substances that have a positive effect on training.

Ingredients: Purified water, fruit juice from concentrate (4.3%), dextrose, taurine, tea, aroma, acidity regulator (E331 sodium citrate, E340 potassium sorbate, E327 calcium lactate), citric acid, fruit extracts (acai, prickly pear, goji berries), mineral salt ( Magnesium lactate), coconut water from concentrate, ginseng root extract (0.08%), black tea extract (decaffeinated), preservative (E202 potassium sorbate), vitamins (B3, B5, B6, B12), sweeteners (E955 sucralose, E950 acesulfame-K), caffeine 0.03%), phosphoric acid, sodium chloride (table salt), stabilizers (gum arabic, E445 glycerol ester from root resin), D-glucuronolactone, guarana seed extract, inositol, L-carnitine-L-tartrate.

(I'm sorry for the bad overview)

Well, I already read a lot where I've heard a lot of good things about it. Only since I am not an expert in this field I am asking here. Oh yes: 50 kcal per 500ml!

So first of all I would like to say that I know that there are better "fitness drinks", only these usually have a bad taste and that's why I prefer these drinks.

If there are objections about the sweeteners (because they are supposed to make you hungry) I would like to say the following: The stuff doesn't make me hungry because I usually consume these drinks at ~ 5 p.m. and after that I don't eat anything anyway, because I no longer feel hungry because of my training feel.

Now my questions: Are these drinks safe or should I really leave them out? Is it even worth taking something before training?

With best regards