Verified
“Third-party quality tested”
Natural Factors' Isura program performs independent identity, potency and contaminant testing on the WomenSense line — verification most category competitors lack.
Reviewed
Verified by SAC team
+20
XP on completion
Best Third-Party Tested
Natural Factors
Natural Factors WomenSense Black Cohosh Extract 40 mg, 90 Vegetarian Capsules Review
7.6/10SAC Product Score™
Natural Factors runs its WomenSense black cohosh through the company's Isura program, an independent identity-and-purity testing operation that is genuinely rare in this category. Each 40 mg capsule is standardized to 2.5% triterpene glycosides (1 mg 27-deoxyacteine), so you know the actives are present and consistent. It earns our Best Third-Party Tested badge for exactly that reason. The trade-off: at 40 mg, hitting a full clinical dose takes two capsules a day, and the efficacy caveats of the whole category still apply.
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Read the complete Black Cohosh guide →How we built the SAC Product Score™ — 7.6/10
Standardization & Actives30%8/10
Standardized to 2.5% triterpene glycosides (1 mg 27-deoxyacteine per 40 mg capsule), the same active class named in the research — clean and clearly labeled.
Third-Party Testing20%9/10
Isura provides independent identity, potency and contaminant testing. Very few black cohosh products carry any comparable verification, and this is the category's standout on that axis.
Dose vs Clinical Range25%6/10
At 40 mg per capsule you need two daily to approach the studied 40–80 mg extract range, so a 90-count bottle is only about six weeks at the higher end.
Tolerability & Safety15%8/10
Single-herb, non-GMO, vegetarian capsule with no licorice or dong quai to complicate the picture. Standard black cohosh liver caution still applies.
Value10%7/10
Around $18 for 90 capsules is fair for a third-party-tested standardized extract, though two-a-day dosing raises the real monthly cost.
The product at a glance
- Form
- Vegetarian capsule
- Dose
- 40 mg extract (2.5% triterpene glycosides) per capsule
- Count
- 90 vegetarian capsules
- Standardization
- 2.5% triterpene glycosides = 1 mg 27-deoxyacteine/capsule
- Testing
- Isura third-party identity/purity program; Non-GMO
- Cost per dose
- ~$0.40/day at 2 capsules
Marketing claims vs. reality
Verified
“Standardized to the actives studied in menopause research”
The 2.5% triterpene glycoside standardization targets 27-deoxyactein, the marker compound used across black cohosh trials.
Partial
“Relieves hot flashes”
Standardized black cohosh extracts show modest, inconsistent vasomotor benefit; Cochrane (Leach & Moore 2012) found insufficient evidence of superiority over placebo.
What our test actually found
01Testing is the real differentiator
Black cohosh has a documented adulteration problem — cheaper Asian Actaea species are sometimes substituted for true Cimicifuga racemosa. Isura's identity testing directly addresses that risk, which matters more here than in most supplement categories.
02Dose math to watch
At 40 mg per capsule, a 90-count bottle lasts ~45 days at two capsules daily. Compared with 80 mg picks, you use capsules twice as fast, which narrows the value gap despite the low sticker price.
Pros & cons, no sugar-coating
Pros
- Genuine independent (Isura) identity and purity testing
- Cleanly standardized to 2.5% triterpene glycosides
- Single-herb formula with no confounding added botanicals
- Vegetarian, Non-GMO capsule
Cons
- 40 mg per capsule means two-a-day to reach a full clinical dose
- Efficacy is still the category's modest, mixed story
- 90-count runs out in about six weeks at the higher dose
The pick when you want to trust the contents
WomenSense is the smart default for anyone who cares more about authenticity and purity than about the lowest price. Isura testing meaningfully reduces the adulteration risk that plagues black cohosh, and the standardization is honest. Expect modest symptom relief at best, plan on two capsules a day, and observe the usual liver caution.
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Sources & further reading
- Leach MJ, Moore V. Black cohosh (Cimicifuga spp.) for menopausal symptoms. Cochrane Database Syst Rev. 2012;(9):CD007244.Leach MJ, Moore V · 2012 · Cochrane Database of Systematic Reviews · PMID 22972105
Black cohosh (Cimicifuga spp.) for menopausal symptoms
Insufficient evidence to support black cohosh as superior to placebo for menopausal vasomotor symptoms.
- Geller SE, Studee L. Botanical and dietary supplements for menopausal symptoms: what works, what does not. J Womens Health. 2005;14(7):634-649.Geller SE, Studee L · 2005 · Journal of Women's Health · PMID 16181020
Botanical and dietary supplements for menopausal symptoms: what works, what does not
Black cohosh shows the most promise among botanicals but evidence for hot-flash relief remains inconsistent.