Food https://youtu.be/bPJUVKizh90
Air https://youtu.be/g3Ud6mHdhlQ (MEA and LIOH for CO2, electrolysis and "candles" for oxygen)
Toilet https://youtu.be/SYFuA3xnkUE?t=985
Nothing is "recycled" as such - and certainly not any of the carbon (you're not eating the carbon captured from MEA or LIOH... or your waste).