Okay, as near as I can make it out your product has:
INGREDIENTS: Water, Salt, Vegetable Fat, Flavoring (contains barley), Sugar, Chicken fat (2%), Yeast Extract, Carrot, Leek, Thickeners (Xantham Gum, Locust Bean Gum), Parsley, Chicken Powder (0.2%), Colour (Burnt Sugar Caramel, Mixed C?????), Pepper, Rosemary Extract.
My stock (Swanson's or store brand) canned stock contains nothing but pure chicken stock with less than 1% fat. There are no seasonings, no salt, no anything except the stock.
The point is that you notice a difference when you add stock while I don't notice much if any difference because you're adding a variety of additional spices while all I'm adding is chicken, and not much fat either.
With my stock you would add the spices that you want rather than a prepared kit of spices like your stock contains. Also, it's desirable to not add any salt until near the end of the cooking process because cooking often reduces the liquid, so it can't be seasoned properly until it has reached nearly the final thickness. If you season it earlier in the process and then lose liquid the result will taste more and more salty because everything has become more concentrated.
I'm not so sure there's anything unhealthy in your stock, but I'd rather know what I'm adding to my recipes by adding ingredients I choose. Also, when you use a formulated product you're stuck with that brand product if you want to recreate your recipes, must include brand names when you share your recipes with others, while my recipes use generic fresh ingredients (most of the time) and can be reproduced by others without reference to brand names.
By the way, your stock doesn't contain chicken. It uses
chicken powder and
chicken fat. Yum!