5 Things to Know Before You Take Saw Palmetto for Hair

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How it works, the dose that was studied, how long it takes — and who should skip it.

Updated October 4, 2026 · 5 min read
Woman touching her hair outdoors
5 things to know

Saw palmetto is everywhere in the hair world right now. Before you add it to your routine, here's what's actually worth knowing — from how it works to the dose the research used.

No biotin  •  Every dose on the label  •  2 capsules a day  •  100 mg tocotrienols  •  320 mg saw palmetto  •  Third-party tested  •  No sugar, no gummy fillers  •  No biotin  •  Every dose on the label  •  2 capsules a day  •  100 mg tocotrienols  •  320 mg saw palmetto  •  Third-party tested  •  No sugar, no gummy fillers  • 
Palm berries
1
Thing #1

It works on the DHT pathway

Saw palmetto has been studied for slowing 5-alpha reductase — the enzyme that turns testosterone into DHT, the hormone behind most pattern thinning.

TTestosterone
5α5-alpha reductase enzymeSaw palmetto slows this step
DHTDHT
Follicles can shrink over time
Scientist in a lab
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Thing #2

The dose that was studied is 320 mg

320 mgdaily — the research dose

Most hair studies used 320 mg of extract daily. Products that hide saw palmetto in a blend don't tell you whether you're anywhere near it.

Monthly planner
3
Thing #3

It takes months, not weeks

3 monthsminimum for a fair test

Hair grows slowly and in cycles. The studies ran for months, so give it at least 3 months of daily use before you judge.

Weeks 1–4Building a daily habit. Nothing visible yet — that's normal.
Months 2–3Hair grows roughly a centimeter a month, and new growth cycles take time to show.
Month 3+The earliest point to fairly judge any hair supplement. Studies on saw palmetto ran for months — up to two years.
Pregnant woman
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Thing #4

It isn't for everyone

Because saw palmetto may influence hormones, it's not recommended during pregnancy, while breastfeeding or when trying to conceive. If you take hormonal medication or blood thinners, check with your doctor first.

Woman touching her hair
5
Thing #5

It works best as part of a complete formula

Saw palmetto addresses one piece — DHT. Hair also needs building blocks and key nutrients. Pairing it with supportive ingredients covers more bases:

Palm fruit
100 mg Mixed TocotrienolsThe dose used in a placebo-controlled hair study (+34.5% hair count).
Eggs
250 mg L-CystineAn amino acid building block of keratin, the protein hair is made of.
Nuts
Zinc + CopperZinc contributes to the maintenance of normal hair — paired with copper for balance.
Sunlight
2,000 IU Vitamin D3Low vitamin D has been linked to hair shedding in observational studies.
34.5%higher hair count with 100 mg tocotrienols in an 8-month placebo-controlled study
27%average increase in total hair count across oral studies in a 2020 review
320 mgthe daily dose used in most saw palmetto hair studies
All 5 boxes checked Denra Daily Density

Denra Daily Density

Daily Density gives you the 320 mg saw palmetto dose from the research — plus the supporting nutrients — in 2 capsules a day, with every dose on the label.

  • 320 mg saw palmetto — the dose used in most studies, printed on the label
  • Plus 100 mg tocotrienols, 250 mg L-cystine, zinc + copper and vitamin D3
  • No biotin, no ashwagandha, no sugar, no proprietary blend
  • Just 2 capsules a day · third-party tested
  • Give it at least 3 months — hair grows in slow cycles
320 mgSaw palmetto extract
250 mgL-Cystine
100 mgMixed tocotrienols
2,000 IUVitamin D3
15 mgZinc bisglycinate
1.5 mgCopper bisglycinate
55 mcgSelenium
90 mgVitamin C
90 mcgVitamin K2 (MK-7)
50 mcg + 2 mgVitamin B12 + B6
Check Availability →
30-day supply · 2 capsules daily · Third-party tested

Quick questions

Can women take saw palmetto?

Yes, many women take it for hair. Because it may influence hormones, it is not recommended during pregnancy, while breastfeeding or when trying to conceive. Ask your doctor if you're unsure.

How long does it take?

Plan on at least 3 months of daily use before judging results. Hair grows slowly and in cycles, and the studies ran for months.

Are there side effects?

Saw palmetto is generally well tolerated in studies. Mild stomach upset and headache have been reported. If you take medication — especially hormonal medication or blood thinners — talk to your doctor first.

Does Daily Density contain biotin?

No. Daily Density is biotin-free by design — so there's no mega-dose biotin to flag before lab tests.