A lot of bad information on microneedling

I read somewhere that 1mm depth every 10 days is the sweet spot, others, .6mm every 10 days, .5mm 3x a week. Is .5mm every 3 days as effective as 1mm every 10 days? Should I place topicals like oils or minoxidil directly before, after, or 24 hours later? Some people say you’re basically injecting the topical if you place directly before or after while others say it’s the most effective to place it directly before /after. Confused.

My opinion is different. The sweet spot is every 7 days, 1.25mm depth with a Dr. Pen Microneedling device with 36 needles held to each area you want the hair to grow for at least 10 seconds.  The goal is to produce a controlled wound that kicks in stem cells to grow hair.