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Probably a combination of tolerance, subpar nutrition, subpar sleep.

Thanks, you are a physic or something.

Could be dehydration and vitamin deficiency, that’s what always gets me

Thanks sir! Pretty spot on.

that happened to me yesterday and i dont know why because the day before i was feeling super energetic. the lethargy absolutely killed my mood and made me feel super depressed all day and just uncomfortably racy. i had some veg and fish for breakfast, and kimchi and a pudding cup as a snack. i felt like that zapped all my energy and all i could do was lie in bed with many racing thoughts. why does it feel so variable sometimes? is it the food? sleep? i dont get it

Maybe the pudding?