Why Saw Palmetto is the Key Ingredient Against Hair Loss
Loss of density, receding hairline, or thinning hair over months: in the vast majority of cases, male and female hair loss has a hormonal origin. At the center of this mechanism is a very specific molecule: DHT.
Among natural solutions to slow down this process without severe side effects, Saw Palmetto (or dwarf palm) has become the gold standard. But how exactly does it work, and why are not all supplements created equal? Let's delve into it.
DHT: Hair Fiber's Number 1 Enemy
To understand the benefits of Saw Palmetto, we must first look at what happens under the scalp.
Dihydrotestosterone (DHT) is a direct derivative of testosterone. It is synthesized locally under the action of an enzyme: 5 alpha-reductase.
In individuals genetically predisposed to androgenetic alopecia, hair follicles show increased sensitivity to this hormone. By binding to their receptors, DHT triggers a harmful cascade:
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It shortens the hair's life cycle by reducing the anagen phase (growth phase) in favor of the telogen phase (shedding phase).
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It leads to the progressive miniaturization of the hair: with each cycle, the hair shaft regrows thinner, lighter, until the follicle becomes exhausted and definitively stops producing hair.
To stop this degradation, the most effective strategy is to block DHT formation at the source.
How Does Saw Palmetto Act on Hormonal Hair Loss?
Extracted from the berries of a small palm tree native to the southeastern United States (Serenoa repens), Saw Palmetto acts as a natural inhibitor of 5 alpha-reductase.
By reducing the activity of this enzyme, it prevents the conversion of testosterone into DHT. Specifically, its action allows for:
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Decreasing the concentration of DHT around hair follicles.
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Slowing down premature thinning and protecting roots from hormonal asphyxiation.
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Extending the longevity of follicles to preserve hair mass in the long term.
Dosage and Concentration: The Two Criteria That Make All the Difference
In the dietary supplement market, the mention "Saw Palmetto" on a label guarantees nothing in itself. Many formulas use simple raw berry powders, which are very low in active ingredients.
To achieve a real biological action against DHT, two scientific parameters are essential:
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A daily dose of 320 mg: this is the reference clinical dose used in most conclusive clinical studies.
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A standardization of 45% fatty acids: it is precisely these fatty acids that contain the active fractions capable of inhibiting 5 alpha-reductase. Without precise titration, the product remains ineffective.
What Clinical Studies Say
The effectiveness of Saw Palmetto is not just a popular belief: it is supported by medical research.
A systematic review conducted by the research team of Evron et al. (Skin Appendage Disorders, 2020) evaluated the effects of saw palmetto supplementation on alopecia. The observed results are clear:
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+27% on average in hair count.
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Approximately +30% improvement in hair mass and density.
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+23.4% increase in the anagen/telogen ratio, meaning hair stays in the active growth phase significantly longer instead of falling out prematurely.
The Holistic Approach: Combining Hormonal Blockage and Follicle Nutrition
Blocking DHT is the essential prerequisite for stopping hormonal hair loss, but promoting vigorous regrowth requires comprehensive support.
To optimize results, the ideal is to combine this targeted plant extract with an intake of essential nutrients: B vitamins, zinc, sulfur amino acids (such as cysteine or methionine), and antioxidants. This synergy neutralizes the root cause of hair loss and provides follicles with the essential building materials to produce dense and strong keratin.
It is precisely this approach that guided the formulation of Grow No.1 by HACT: combining 320 mg of Saw Palmetto standardized to 45% fatty acids with a complex of targeted micronutrients, to simultaneously act on hormonal inhibition and fiber vitality.