Saw Palmetto for Hair Loss — Does It Actually Work?
How saw palmetto is studied for thinning hair, why extract standardisation matters, and what to look for on a label.
Short answer: yes, saw palmetto is a studied DHT blocker for hair thinning — but potency varies wildly by extract, so the standardization percentage matters more than the words "saw palmetto" on a label.
Saw palmetto is one of the most-studied natural DHT blockers for hair thinning — but not all extracts are equal. Here's the mechanism, and why the potency of the extract you use matters more than the fact that it's "saw palmetto" at all.
See If You QualifyBlocks 5-Alpha Reductase
DHT (dihydrotestosterone) is the hormone that shrinks hair follicles over time. Saw palmetto extract inhibits 5-alpha reductase, the enzyme that converts testosterone into DHT — cutting off the process at the source.
Standard Extracts Are Weak
Most saw palmetto in hair-loss supplements is a commodity extract standardized to just 20–25% free fatty acids, the compounds actually responsible for blocking the enzyme.
Serevelle® Is 75× More Potent
FLOTE RADIANCE uses Valensa's Serevelle® — a CO2-extracted saw palmetto standardized to 85% free fatty acids. That concentration difference is what drives the 75× potency figure over standard extract.
Paired for a Full-System Effect
Serevelle® works internally via the oral supplement; Serevelle™ Topical in the serum delivers DHT inhibition at the scalp directly. Used together, they address thinning from both directions.
What to check before buying a saw palmetto supplement
- ✓The free fatty acid standardization percentage — not just "saw palmetto extract" on the label
- ✓The extraction method — CO2 extraction preserves more of the active fatty acid profile than solvent extraction
- ✓The exact milligram dose, not a proprietary blend total
- ✓Whether it's paired with a topical DHT inhibitor for follicle-level coverage, not just an oral dose
See exact doses for Serevelle® and every other active on our ingredient glossary.
Saw palmetto & DHT — frequently asked questions
Does saw palmetto actually block DHT?
Published research shows saw palmetto extract inhibits 5-alpha reductase, the enzyme that converts testosterone into DHT. The catch is potency: efficacy depends on the extract's standardization (its free fatty acid percentage) and extraction method, not just the ingredient name on a label. FLOTE RADIANCE uses Serevelle®, CO2-extracted and standardized to 85% free fatty acids.
Does saw palmetto actually work for hair loss?
Saw palmetto is one of the most-studied natural DHT blockers for hair thinning, but results depend heavily on extract quality and consistent daily use across a full hair growth cycle (about 90 days). It's a cosmetic/structure-function ingredient, not a drug — individual results vary.
How is saw palmetto a DHT blocker?
It inhibits 5-alpha reductase, the enzyme responsible for converting testosterone into DHT — the hormone linked to follicle miniaturization over time. Blocking the enzyme reduces the amount of DHT reaching the scalp.
What's the difference between oral and topical saw palmetto for DHT?
Oral saw palmetto (like Serevelle®) works systemically, addressing DHT production throughout the body. A topical DHT inhibitor like Serevelle™ Topical targets the scalp directly. Pairing both addresses the pathway from two directions instead of one.
How much saw palmetto extract do I need for it to work?
Standardization matters more than milligram count alone. Most commodity extracts are standardized to only 20–25% free fatty acids — the compounds actually responsible for blocking the enzyme. Serevelle® is standardized to 85%, which is where the potency difference comes from.
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