Do Holland and Barrett TANNING PILLS actually work?Watch
If you peel away at the signs outside their shops you'll see they used to be called Placebo and Idiot.
Basically, it could do you more harm that good. L-tyrosine can have bad effects on your gastrointestinal tract and numerous side effects. Also, you have to go out in the sun for it to 'potentially' work. You can't just take them then wake up the next day with a tan. If I were you, i'd just fake it.