Are there any studies that prove the effectiveness of saw palmetto for restoring hair in the bald places and stop hair fall?

Question

I'm looking for studies apart from the ones in the third link in my question, that prove the efficacy of saw palmetto in 1) stop hair fall, and 2) growing back hair in the places of the scalp where the hair was lost.

I'm aware of the fact that theoretically saw palmetto blocks the enzyme that converts testoterone into DHT, and hence it should be effective. See for example- https://www.healthline.com/health/saw-palmetto-hair-loss#saw-palmetto, https://articles.mercola.com/sites/articles/archive/2018/07/30/saw-palmetto-for-alopecia.aspx, and in fact, two such studies have been mentioned here- https://blog.nutrafol.com/2017/03/12/saw-palmetto-benefits-hair-growth/ (read the description in the link please). But still, more studies in this regard would be crucial to prove its effectiveness. Thank you!

Answer 1

These are extracts and links:

• Other proposed treatments include saw palmetto extract (Serenoa Repens); prostaglandin analogs like latanoprost and bimatoprost, which may be cost prohibitive (https://www.ncbi.nlm.nih.gov/books/NBK430924/)

• Serenoa repens(commonly called Saw Palmetto) extracts promote hair regeneration and repair of hair loss mouse models by activating TGF-β and mitochondrial signaling pathway. (https://www.ncbi.nlm.nih.gov/m/pubmed/29949176/)

• A randomized, double-blind, placebo-controlled trial to determine the effectiveness of botanically derived inhibitors of 5-alpha-reductase in the treatment of androgenetic alopecia

• CONCLUSIONS: This study establishes the effectiveness of naturally occurring 5AR inhibitors against AGA for the first time, and justifies the expansion to larger trials.(https://www.ncbi.nlm.nih.gov/m/pubmed/12006122/)

• We can summarize our results by observing that Serenoa repens could lead to an improvement of androgenetic alopecia, while finasteride confirmed its efficacy.  (https://www.ncbi.nlm.nih.gov/m/pubmed/23298508/)