>I've seen things that say fructose has worse effects than sucrose in terms of spiking your blood sugar or whatever but that's minor compared to the overall impact of any sugar

That sounds pretty major. You can be not in the slightest bit obese and the blood sugar spikes will still be bad for your brain, your insulin regulation, etc as far as I understand it.

> I've seen things that say fructose has worse effects than sucrose

Sucrose is 50% fructose.

HFCS is ~42-55% fructose. Its "high fructose" compared to just straight corn syrup, which is 0% fructose (practically pure glucose).