There has been long term meta-analyses done on melatonin. It’s apparently safe with no rebound effect seen with other sleep medications.
>> There has been long term meta-analyses done on melatonin. It’s apparently safe with no rebound effect seen with other sleep medications. <<
Yes, because it’s actually what the body is SUPPOSED to use for this, but which modern environments prevent from being created in adequate quantities (blue light, phones, late-night stimulation, etc.)
I would note however, that a more-is-better approach from consumers leads most melatonin sellers to use incredibly unnaturally large doses.