Collagen Peptides (+ Vitamin C) vs Finasteride / Dutasteride
Both are used for skin & hair. Here's how they compare on human evidence, mechanism, safety and availability — in plain English.
| Collagen Peptides (+ Vitamin C) | Finasteride / Dutasteride | |
|---|---|---|
| Human evidence | ★★★★☆ | ★★★★★ |
| Legal status | OTC Supplement | FDA Approved |
| How it works | Hydrolysed collagen supplies glycine/proline/hydroxyproline that preferentially accumulate in tendon/ligament; taken with vitamin C (cofactor for prolyl hydroxylase) before loading, it doubles collagen-synthesis markers. | Inhibit 5α-reductase (SRD5A2), blocking testosterone→DHT conversion. DHT drives male-pattern hair loss and prostate growth. Finasteride hits type II; dutasteride hits I and II. |
| In plain English | Feeds your tendons and ligaments their raw materials right before you stress them — timing matters, so take it ~45 min before training with vitamin C. | Testosterone gets converted into a stronger cousin (DHT) that kills scalp follicles. These drugs block that conversion to save hair — but for a minority, lowering DHT dents libido/mood ("post-finasteride" concerns). |
| Bottom line | The most practical connective-tissue supplement; timing is key. Highly relevant to running/Hyrox tendon load. | Most effective hair-loss drug; weigh the sexual-side-effect risk honestly. |
| Availability | Available over the counter | Available over the counter |
Which is better for skin & hair?
Finasteride / Dutasteride has the stronger human-evidence rating (★★★★★ vs ★★★★☆), but the right choice still depends on your goal, tolerance and budget.
Full breakdowns: Collagen Peptides (+ Vitamin C) · Finasteride / Dutasteride.
Common questions
Is Collagen Peptides (+ Vitamin C) or Finasteride / Dutasteride better for skin & hair?
Finasteride / Dutasteride has the stronger human-evidence rating (★★★★★ vs ★★★★☆), but the right choice still depends on your goal, tolerance and budget.
What's the difference between Collagen Peptides (+ Vitamin C) and Finasteride / Dutasteride?
Collagen Peptides (+ Vitamin C): The most practical connective-tissue supplement; timing is key. Highly relevant to running/Hyrox tendon load. — Finasteride / Dutasteride: Most effective hair-loss drug; weigh the sexual-side-effect risk honestly.