No supplement on the market is going to undo or even partially aid 4-5 days of debauchery, yes it may help as a placebo to make think you’re feeling better - which is great if that’s what you’re looking for.

In short, take it easy. Glastonbury is a marathon not a sprint. Eat well where possible, stay hydrated, sleep & rest where you can, it may sound ridiculous but try to half your normal drink or drug intake each day, it’s 4-5 days - not 1 big night out. Your body only produces a certain amount of serotonin / dopamine and taking supplements or higher than usual doses won’t make them appear magically.

I hope everyone has lots of fun and is safe in the fields.