Guarana warning!

So i thought i had found some nice healthy granola that appeared to be just oats and sunflower seeds/sugar and i tucked into a bowl this morning, then i double checked the ingredients and found that the guarana that it contains is actually a source of caffeine!! and apparantly it contains more caffeine than coffee weight for weight!
Anyway just thought i would warn people as i didn’t know about this and guarana is often found in ‘health’ foods and drinks.