Understanding Thick Chin Hair and Its Ayurvedic Solutions - #46921

I an 32 Female and have thick (terminal) hair on chin (esp. where I plucked) intermingled with thinner/finer (velus) hair on rest of the face. I recently got my hormonal panel done to check hormone levels, and turns out that all other hormones are normal but I do have subclinical hypothyroid (TSH~5) which also likely affects my SHBG which is low (25.8). My understanding so far is that the thick chin hair is not truly hormonal and it is a result of follicular sensitivity (common for Indian females), mechanical hirsutism (plucking-induced inflammation) and aggravated by lower SHBG levels. I would like to understand the thick chin hair from Ayurvedic standpoint. 1. I heard about Lomasthama Tailam for converting thick chin hair to thin chin hair. Can you share if its safe to use (given its arsenic content)? Also the process of using it (Usage Steps and Frequency) 2. I also heard about nagarmotha oil /cyperus rotundus which slows hair growth on chin. Does it also thin chin hair like Lomasthama Tailam? If so, which one is better amongst the two. 3. Any other suggestions from ayurvedic standpoint for chin/facial hair and subclinical hypothyroid?