Nutrafol and Viviscal are the two best-known hair growth supplements, and they're more alike than different: both are marine-based nutraceuticals with modest, sponsor-funded evidence and ongoing costs. The main split is approach — Nutrafol targets multiple pathways including stress and DHT, while Viviscal is a simpler marine-collagen nourishment formula, usually at a lower price.
At a glance
| Nutrafol | Viviscal | |
|---|---|---|
| Approach | Multi-pathway: DHT, stress, inflammation | Marine-collagen nourishment |
| Key ingredients | Saw palmetto, ashwagandha, marine collagen | AminoMar, biotin, horsetail, zinc |
| Targets stress / DHT? | Yes | No |
| Dosing | 4 capsules/day | 2 tablets/day |
| Price | Higher | Lower |
| Best for | Stress- or androgen-driven shedding | General shedding / nourishment |
How they differ
Nutrafol casts a wider net, combining a mild DHT-blocker (saw palmetto), an adaptogen for stress (ashwagandha), and a vitamin-mineral base — which is why it's pitched at people whose thinning has a stress or hormonal component. Viviscal keeps it simpler: a marine complex plus supporting nutrients, a longer track record, and a friendlier price.
What the evidence shows
Both rely largely on manufacturer-funded studies that skew toward women and report modest improvements over a few months. Neither approaches the evidence base of minoxidil or finasteride, so the realistic framing for either is "gentle support," not "treatment."
Which should you choose?
Pick Nutrafol if your shedding has a clear stress or androgen component and the budget works; pick Viviscal if you want a simpler, cheaper option or value its longer history. Either way, treat it as an adjunct to a proven routine and give it at least 90 days before judging.
Still weighing hair supplements?
See the full lineup, including how Nutrafol and Viviscal rank against the rest.
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Written by
Daniel Reyes
Editor-in-Chief, Happy Hair Journey
Daniel has spent five years researching men's hair loss treatments and personally testing protocols across minoxidil, microneedling, and LLLT. He reviews every published study referenced on this site.
Medically reviewed by
Dr. Maya Chen, MD
Board-certified dermatologist · NYU Langone