3 doctors weighed in:

How long will it take to effects of l-tyrosine?

3 doctors weighed in
Dr. Glen Elliott
Pediatrics - Psychiatry
2 doctors agree

In brief: Unknown

Assuming it has any effect on adhd, which is not established, it could take weeks or months to have any notable effect, since you are trying to build up brain supplies in the right areas high enough to overcome a presumed deficit in Dopamine or norepinephrine.
My professional opinion is that it is highly unlikely one would get a marked effect, ever.

In brief: Unknown

Assuming it has any effect on adhd, which is not established, it could take weeks or months to have any notable effect, since you are trying to build up brain supplies in the right areas high enough to overcome a presumed deficit in Dopamine or norepinephrine.
My professional opinion is that it is highly unlikely one would get a marked effect, ever.
Dr. Glen Elliott
Dr. Glen Elliott
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