Peanut M&Ms are definitely an excellent quick acting anti-bonk device. They have worked miracles for me.

OTOH, I also recall dates being a great source of energy when you snack on 2 or 3 after lunch. And even though I was never much of a milk drinker to begin with, and especially not powdered milk, when I would lag in the afternoon (on a long trip I did many moons ago), a water bottle full of reconstituted powdered milk was like manna from heaven. You can turn up your nose if you want, but it tasted delicious, and I had energy to spare afterwards. Yes, powdered milk. Not Nido or anything special, just plain old yucky powdered milk. You'd be amazed what tastes good when your body needs it...

MNS a/k/a Dixie Moon