Didn't know about gels until now. I've experience with drinks, smoothies, cereal bars, all of those who can serve as energy boosters, but honestly not gels. Usually I don't by any booster, I rather prepare myself one, adding oatmeal, honey, coffee, coconut water, chia seeds, bananas or papayas. Not a fan of commercial bottled drinks or mixes, usually they contain sugar and tons of chemical stuff.