[Hazel]

Hi bared, I was in the same situation as you. I've been taking 2 500mg capsules a day and now my temperature has risen to the right range. It took 3-4 weeks and it was gradually increasing after 2 weeks. My brand is Now l-tyrosine, but I believe any brand will do. They all have the same ingredient; l-tyrosine. Good luck.

PS. I am also taking 330mg of kelp a day. I take my l-tyrosine with a 1 hour gap of no food, this is recommended on the bottle.