The best source of information for deciding whether a product meets your needs would be to check the product's labels as it lists all the contents it has and what you will get from consuming it, therefore checking the labels on products is the best way as you can see right away if it has what you need
The best source of information for deciding whether a product meets your needs is to go online and do research about it before buying it. Or, you could check the reviews online. But in case if you bought check in the back of the product and see what it contains or what is included.
* Hope this helps!!! Mark me Brainiest :)
