The user has been using topical finasteride and minoxidil for two years with decent regrowth and recently added microneedling to their routine. They are questioning if the small hairs observed are new regrowth from microneedling or just vellus or miniaturized hairs.
Microneedling at depths greater than 0.6 mm may damage miniaturized hair follicles, with 0.5 mm showing better results for hair regrowth. Combining microneedling with minoxidil enhances absorption, but caution is advised to avoid damaging follicles.
A user shared a video suggesting that 0.5mm microneedles are most effective for hair growth. Other users mentioned different microneedle lengths and advised consulting a dermatologist for personalized treatment.
The conversation is about microneedling for hair loss. The conclusion is that there are differing opinions on the depth and frequency of microneedling, with some studies suggesting positive results with 1.5mm depth once a week, while others prefer lower depths and less frequent sessions.