One of the problems of cycling longer distances is taking on sufficient levels of energy. You can’t eat too much at any one go because it will slow you down, so high-level cyclists graze quite a lot (not literally; stopping to chew grass would slow them down unacceptably). The most common snacks split into short-term, basically sugars, and long-term, mainly complex carbohydrates with some protein and fat. The idea is to eat the long-term snacks consistently, and when you’re flagging or in need of a boost you go with the sugary stuff. All sorts of formulations have ben developed to ensure that the athlete can absorb as much of the energy as they can, using different types of sugars for example (a mixture of glucose and fructose is taken up more quickly than the same amount of glucose, though fructose can cause, um, gastro-intestinal issues).
All that’s a little more trouble than I care for (on my few longer rides I’ve tended to favour cookies at the aide stations and m&ms in between), so you can imagine how pleased I was to discover a way of constantly micro-dosing with protein, a method that requires literally nothing from the rider. All that is required is to cycle past a nature reserve in the run-up to dusk with your mouth open, and you’ll find enough micro-packets of protein to keep you fully fueled until you throw up or fall off in revulsion.