When you take tyrosine it's best to take the tyrosine without food for it to work better.
You should take tyrosine at least 30 minutes before eating any food to allow the tyrosine time to work before your stomach gets full.
The tyrosine works best on an empty stomach and if you eat right after taking tyrosine it takes longer for it to work and may not work as well.
The supplement tyrosine 30 minutes before meals, divided into 3 daily doses.
You can take the tyrosine with food but it's not recommended to do so because the tyrosine doesn't work as well on a full stomach.