All mods for the original Quake seem to be too brooding and dark, throw some recommendations for something light and fun if there even are any

Dear comrades join us today on the 50th of Discord in celebration of discoflux! Ponder the shining orbs, the luminescent rays hold the keys to the transient locks. No ice cream allowed.

Can anyone help me trace a scientific article from a peer reviewed journal that shows the model of a process of how isolated glycine from supplements can get into blood stream perorally and pass the brain barrier to show the actual effect in humans?

So there is a lot of debate around glycine online and as a layman I struggle to find any actual model that shows how glycine from supplementation actually gets into brain and starts doing all of those amazing things they say it does like helping ADHD people to calm down and concentrate or in others to the contrary evokes anxiety. Some people argue that those effects come from other ingredients from supplementation, such as magnesium. I'm looking for a peer reviewed study on this mechanism in humans. I'm trying to be skeptical and not cling to one prejudice or the other, just wanna see what the actual studies show if any

/pic unrelated, just added cuz it wouldn't let me post otherwise

Guix main repositories and substitutes appear to be inaccessible from russia, I don't know where else to ask about this other then the irc, but has anyone encountered this and knows how it could be solved? I've found some mentions of this online but no other advices or workarounds

Basically when I try to use Guix package manager on a different system I get infinite attempts to connect to substitutes and when attempting to install guix in a vm the installation fails at some point