Any time you see something non-specific like "boosts the immune system" or "increases energy" it means the product is likely worthless because those claims don't actually mean anything.
It's the reason so many "nutrition" companies can get away with claiming all kinds of things such as "burn fat faster". That statement means something to you and I, but it's not a medical statement.
They might be "meaningless" to actual medical professionals or people with decent knowledge of the ways that companies skirt product labelling laws. But the average layperson who might buy these products is probably neither of those things and is more likely to interpret them literally.