TLDR Finasteride doesn't affect bone density in male rats.
The study investigated the effect of finasteride on bone density in male rats. The results showed that bone density was normal in male rats treated with finasteride, and there were no significant differences in bone mineral density between the finasteride-treated rats and the control group. The study suggests that testosterone alone may be sufficient to promote normal bone development and density in male rats even when DHT synthesis is blocked. The study lasted for 11 weeks and was conducted on 32 rats.
48 citations,
November 1992 in “Clinical Endocrinology” Long-term finasteride use doesn't change bone density or metabolism.
1040 citations,
October 1992 in “The New England Journal of Medicine” Finasteride effectively treats BPH but may increase sexual dysfunction risk.
147 citations,
April 1990 in “The Journal of Clinical Endocrinology and Metabolism” Finasteride safely lowers DHT levels without affecting testosterone.
55 citations,
March 1990 in “The Journal of Clinical Endocrinology and Metabolism” Finasteride may treat baldness but less effective for those with 5α-reductase deficiency.
29 citations,
April 1995 in “Endocrinology” Finasteride doesn't affect bone density in male rats.
30 citations,
August 1992 in “The Journal of Clinical Endocrinology and Metabolism” Finasteride doesn't affect hormone levels in normal men.