I’m 30 years old and at the end of my rope. I first got on fin in 2016 after noticing thinning in my crown. Around early 2019, shortly after I turned 29 and started a stressful job, fin stopped working for me. Within four months, I lost an inch off my hairline and almost half the density of my front third of my scalp. I got on 0.5 mg dutasteride every day around April 2019. Dut seemed to stop the loss until now, when I started diffuse thinning again on my front and — for the first time in years— my crown. 12 months after starting dut, I am significantly below baseline, with signs of diffuse thinning all over the top of my scalp.
Dutasteride (blocks 85% of 5 alpha reductase) is not the magic bullet for hair loss. It is just a little more effective than finasteride (blocks 70% of the 5 alpha reductase). See this post: https://baldingblog.com/realize-fin-isnt-working/ which also applies to dutasteride.