Using Half of Suggested Nutrients

I'm just wondering what you guys do, do you use what the product tells you or do you put half or do you double it. I heard that there was a study that whether you use half or double, you get the same end product, I dunno though can anyone confirm?

I can almost guarantee that if you use double, you'll burn your plants. Nutes are a funny thing in that some plants don't need as much as others. So in my 10 years in this hobby, I've found the labels to be pretty accurate as far as dosages go, but they will need tweaked based on how your plant responds.

Really matters what type. And I'm talking a soil grow, not sure about other types.

Pure nute ferts that just contain the chemical elements will totally burn a plant or not give it enough depending on the dose. Organic ferts like kelp or guano seem to allow the plant to pull out what it wants without burning, even at twice the dose (or at least that's what I've noticed). I only give my plants pure ferts a few times during vegging if they really need it. During most of the vegging I give them different organics (some seabird/kelp, and some Alaskan fish emulsions). During flowering I switch it around to mostly pure ferts and some organics. I like to think I saved the pure ferts, with much higher salt contents, for the flowering thereby keeping the soil from a salt build up.