I don't believe in treating chickens with antibiotics just to be doing it, anymore than I would treat my kids with antibiotics just for fun. If they have something that needs to be treated, then treat it. But don't use antibiotics for a preventative. It kills any probiotics they might have and does not allow them to develop some of the immunities they need. Instead of using antibiotics, use good husbandry practices, like keeping their brooder dry.
Chicks need food, water, warmth, a clean and dry brooder, and protection from predators when you raise them in a brooder. That's all they need. You'll find lots of people on this forum that feed them strange things and people that put all kinds of stuff in the water like sugar, electrolytes, vinegar, and who knows what else. In moderation, that stuff does not hurt them but they don't need it. They might get some kind of boost from some of that, but they need feed and water. I think the big advantage of giving them a lot of that stuff is that it makes the human feel like they are doing something special to help the chicks. There are lots of people that firmly believe their chciks do better from doing some of that, but I don't do anything beyond basic feed and water and my chicks don't die in the brooder.
They are your chicks. You can give them whatever you wish. I don't know what that Vitol is, probably some type of energy drink. In moderation it won't hurt them. Do they need it? No, but it won't hurt them.