Allaboutyou83

Hi everyone, First of all excuse me if this is not the right forum to post this. I am sure this will be an easy question for someone with a basic level of chemistry (who is definitely not me). My mum used to use a facial serum that had 5% of Thiotic Acid (Alpha Lipoic Acid) diluted in Propanediol. It was a 30ml solution. The brand (The Ordinary) stopped selling it and she loved it and I wanna try to make it for her. Can anyone please tell me how many miligrams or grams of Alpha Lipoic Acid I would need to get a 30ml 5% ALA solution (propanediol as base). Would I need to heat it to disolve it or no heat is needed? Thank you very much to anyone that can help. Dan