Recommendation Health & Fitness

What Actually Helped You Survive Jet Lag on a 12+ Hour Flight?

For Whom/What:

long-haul international travel

Budget:

any

Requirements:

Something you can bring through security

Not just "sleep on the plane" advice

Extra Details:

I need to arrive and function the same day. Everyone says melatonin like it's a magic fix and for me it does nothing. Wondering if there's a specific product/routine people swear by beyond the generic advice.