[njonsson]

The best high-GI food I have found is Welch's fruit snacks. They are superior to glucose tablets: (1) Can be swallowed whole quickly and easily, or dissolved by saliva. (2) More concentrated, so you can pocket or pack more glucose in less space. (3) Can be compressed in a pocket or backpack without turning to powder that leaks everywhere. A packet of fruit snacks is 17 g of carbohydrate, which is small enough to catch moderate crashes and large enough when doubled to catch major crashes.

[danbolt]

I don’t have diabetes, but I’ve heard from people with T1 that Welch’s work well for the reasons you mentioned.

When I browse the candy aisle at the store, I often wonder if certain treats tend to be better than others for administering glucose. In your experience, are there ever certain properties of candies that are more useful than others?

[bradleyy]

Ideally, you're looking for something that spikes blood sugar fast (i.e. high glycemic index). This is why e.g. Skittles/Sour Patch Kids/fruit snacks (mainly the kind that don't... actually have any fruit, lol) are a go-to for type 1s.

You're basically looking for something that's analogous: as crack is to cocaine, <low snack> is to sugar. Hits fast and doesn't last as long.