Finasteride: Research, Dosing, and Where to Buy in 2026
A research-first profile for Finasteride (Propecia), aggregating mechanism notes, transcript dosing mentions, vendor recommendations, and PubMed-indexed literature without presenting medical guidance.
Finasteride is a research compound profiled here from named-expert transcripts and peer-reviewed literature, without medical guidance. As of July 2026, The Peptide Wiki aggregates 15 PubMed-cited papers, 19 attributed expert mentions, and 5 transcript dosing protocols for Finasteride, each linked to its source.
- Also indexed as Propecia.
- 5 aggregated dosing-protocol mentions from source transcripts.
- 15 PubMed-indexed citations listed in the research table below.
- 0 vendor recommendations captured from named experts.
- Evidence level in this entry is marked as fda_approved.
What is Finasteride?
Research compound aggregated from creator and literature mentions. No direct disease-treatment claims are made on this page.
Experts on background and overview · 5 cited mentions
"The serum half-life of finasteride is about 8 hours... it has an elimination time of about 3 days. But the drug's active time in your body is probably about 48 to 72 hours. So you could do 1 mg every 3 days, or 1/2 mg every 3 days."
"For our clients who are very concerned about hair loss, would high-dose test with a 5-alpha reductase inhibitor compared to nandrolone only approach?"
"I would say that oral finasteride and dutasteride is a real risk and I would rather do the surgery than take those things orally cuz I've just seen too many horror stories."
Show 2 more cited mentions on background and overview →
"Already on finasteride. What are some hair-safe-ish compounds?... if you're on finasteride, you feel good libido-wise, I would stick with testosterone and NPP."
"Can you reduce the hair loss by taking minoxidil shampoo or ketoconazole shampoo or topical dutasteride, finasteride, and RU58841."
What is Finasteride researched for?
5-alpha reductase inhibitor for hair loss; ~70% DHT coverage but carries persistent post-finasteride syndrome risk.
Experts on uses and effects · 2 cited mentions
"finestride could be like the one that moves the needle. Um, I would look at the pygmium and salt metal first"
"finaster drive about 70% coverage. Dutastride about 90% coverage"
Finasteride Dosing Protocols
The entries below are transcript-derived dosing mentions. They are preserved for research context and are not medical advice.
| Speaker | Source | Timestamp | Protocol | Evidence |
|---|---|---|---|---|
| Dean | The ULTIMATE Hair Loss & Gyno Prevention Tier List (No Surgery Required) | 00:35:08 | Dean reported a strategy of taking 1 mg every 3 days or 0.5 mg every 3 days (rather than daily) as one approach some users discuss for minimizing PFS risk while still getting selective 5AR inhibition, noting this cadence aligns with the 48-72 hour active time rather than the 8-hour serum half-life (anecdotal, not medical advice). | anecdotal |
| Vigorous Steve | Best PED Use (Competitive vs. Lifestyle) & All Things to Avoid Death... | 02:03:51 | Steve reported that users who tolerate finasteride have used 1 mg/day, with serum DHT checked beforehand (anecdotal). | anecdotal |
| Kurt/Dean | The ULTIMATE Hair Loss & Gyno Prevention Tier List (No Surgery Required) | 00:06:39 | Topical finasteride (2.5%) via Hims brand spray, prescribed; applied 2-3x/week post-transplant | anecdotal |
| Kurt | The ULTIMATE Hair Loss & Gyno Prevention Tier List (No Surgery Required) | 00:06:33 | Topical 2.5% finasteride + 7% minoxidil (Hims spray) once daily | anecdotal |
| VigorousClips | Do Aromataste Inhibitors Cause Neurotoxicity? Aromatase Inhibitors... | 00:08:49 | Hypothetical scenario from source AGbWKsPlAXo: 1 mg finasteride daily to reduce dihydrotestosterone levels. The presenter noted this as a rhetorical thought experiment, not a medical recommendation. | anecdotal |
Where to Buy Finasteride in 2026
No tracked vendor recommendations for Finasteride yet. See our vendor directory.
Side Effects and Safety
Anecdotal reports and study-level observations vary by route, dose, and individual. This page does not provide medical advice. Consult a qualified clinician before any research use.
What Experts Say
3 experts across our source library discuss Finasteride. Each entry is that expert’s most context-rich mention: click to watch it at the exact timestamp in the original video. Quotes are also emitted as Schema.org Quotation JSON-LD for AI assistants.
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“The serum half-life of finasteride is about 8 hours... it has an elimination time of about 3 days. But the drug's active time in your body is probably about 48 to 72 hours. So you could do 1 mg...”
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“For our clients who are very concerned about hair loss, would high-dose test with a 5-alpha reductase inhibitor compared to nandrolone only approach?”
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“finaster drive about 70% coverage. Dutastride about 90% coverage”
See 4 more expert mentions →
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“I would say that oral finasteride and dutasteride is a real risk and I would rather do the surgery than take those things orally cuz I've just seen too many horror stories.”
-
“Already on finasteride. What are some hair-safe-ish compounds?... if you're on finasteride, you feel good libido-wise, I would stick with testosterone and NPP.”
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“Can you reduce the hair loss by taking minoxidil shampoo or ketoconazole shampoo or topical dutasteride, finasteride, and RU58841.”
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“finestride could be like the one that moves the needle. Um, I would look at the pygmium and salt metal first”
User Reviews
User reviews aggregator coming Q3 2026 (Reddit + YouTube comments + Discord research notes). Until then, see the expert quote section above and PubMed citations below.
Research Efficacy Snapshot
Published efficacy percentages cited in PubMed trials and named-expert reports about Finasteride. Each line links to the original source.
- "By the age of 70 years or older, 80% of White men and up to 40% of women show signs of AGA, with a substantial impact on mental health and quality of life, particularly among women." · Gómez Zubiaur A et al, 2026 PubMed
- "There was a significant decrease in ejaculatory function of approximately -10% (vs." · Han TM et al, 2026 PubMed
- "-20% combination therapy) from baseline levels from 3 to 5 years of follow-up with WVTT." · Han TM et al, 2026 PubMed
- "Across studies, finasteride and dutasteride were associated with reductions in sperm count (34% with finasteride, 29% with dutasteride), sperm concentration, and motility." · Quintero T et al, 2026 PubMed
- "Compared with controls, polyphenolic interventions significantly improved hair density (SMD 0.90; 95% CI 0.51-1.30) and total area hair count (SMD 1.03; 95% CI 0.42-1.63), although substantial heterogeneity was observed." · El Ammari C et al, 2026 PubMed
- "Reporting Odds Ratios (RORs) with 95% CIs were calculated to compare psychiatric reactions between finasteride and dutasteride." · Chiappini S et al, 2026 PubMed
- "Notably, 74% of these drugs, including finasteride, diltiazem, and carbidopa/levodopa, lacked cognitive disorder warnings in FDA labels." · Wen H et al, 2026 PubMed
- "Cross-database validation confirmed consistent signals for 92% of primary drug-event pairs." · Wen H et al, 2026 PubMed
- "At three years, finasteride was associated with lower BPH (HR 0.64, 95% CI 0.55-0.75) and PCa diagnosis (HR 0.49, 95% CI 0.33-0.74)." · Adler R et al, 2026 PubMed
- "At five years, finasteride was associated with lower BPH (HR 0.52, 95% CI 0.43-0.63) and PCa diagnosis (HR 0.47, 95% CI 0.28-0.79)." · Adler R et al, 2026 PubMed
Research and Studies
15 PubMed-indexed papers reference Finasteride. Top 15 shown.
Legal Status
Finasteride is presented here as a research compound. FDA approval status, scheduling, WADA status, and state-specific telehealth rules may apply. Always verify current regulatory status. Last verified: 2026-07-09.
Frequently Asked Questions
Is Finasteride FDA-approved?
Finasteride is presented on this page as a research compound. FDA approval status, scheduling, and state-specific rules may apply and change. Verify current regulatory status before any decision.
What dosing is reported for Finasteride?
This page aggregates 5 dosing-protocol mention(s) from named-expert transcripts, each linked to a verbatim source timestamp. See the Dosing Protocols table above. Mentions are anecdotal, not medical advice.
How much research has been published on Finasteride?
15 PubMed-indexed paper(s) reference Finasteride in our current research feed. See the Research and Studies section above for citations.