A typical sleep "stack" — like the Rack Ops blend Hitt Fitness rates as Weak — bundles melatonin with a mix of herbs and minerals. Some of those ingredients have a real, if modest, basis. Others are along for the ride.
Melatonin is best understood as a circadian signal, not a sedative. It genuinely helps with jet lag and shifted sleep schedules, and modestly shortens the time to fall asleep for some people. The catch: typical doses are far higher than needed — 0.5–1 mg is often plenty, and more isn't better.
If you're low in magnesium, correcting it can help sleep and general wellbeing. If you're not, the effect on sleep is small and inconsistent. It's a reasonable, low-risk option — just not a guaranteed switch.
Valerian, chamomile, and similar botanicals show weak and inconsistent results in controlled trials. They're unlikely to hurt, but we won't pretend the evidence is strong — and in the app that's exactly what the rating reflects.
Hitt Fitness rates sleep supplements honestly, flags weak evidence, and points you back to the basics that actually move the needle.