It works marginally at best for most people. Oral minoxidil works far better but makes you hairy everywhere.
Saw palmetto is perhaps capable but unlikely to promote hair growth or stabilization. To the extent that it works, it does weaker things than dutasteride and finasteride by far. Rule of thumb is that nothing herbal works ever, anywhere for hair regrowth or feminization. It's a waste of time, focus and money not to mention you never know if you are getting viable doses. Most seem to be garbage.
Except for keto, no shampoos work or have any effect except to strip hair and keto shampoo strips sebum bare which you don't want unless you are male where sebum can often be overflowing and bacterially and virally poisonous. Nutriol is an utter and complete scam. If you want to try something natural that might marginally work, try Polysorbate 80 or 60. Finasteride or really dutasteride is as good as it gets for men who want to keep the hair they have and maybe regrow a little.
It's incredibly easy to think that you see new hair when they are still villus. I still have problems at times telling whether a hair is new.
Hormonal therapy is incredibly powerful and a person can use natural and not synthetic hormones but except for minoxidil, nothing else will either stop hair loss or regrow hair and that's with a huge caveat because minoxidil seems to have a large contingent of very unhappy users.