The short answer · Estradiol
Take boron citrate for estradiol. This is the one to buy.

Nutricost, Boron, 10 mg , 240 Capsules
4.8· 1,106 ratings· $0.06/serving
Boron Citrate 10 mg — inside the studied 3-10 mg window
Of 461 products scored for Estradiol, Nutricost, Boron, 10 mg , 240 Capsules ranks #1 with a DoseRank score of 68. Evidence is still thin for Boron Citrate.
Retailer links may be affiliate links. Rankings and placement are never paid.
The form“Why Boron Citrate?”Evidence Limited evidence
Evidence is still thin for Boron Citrate.
- Boron CitrateThe pick
Limited evidence · 10 mg
A citrate-chelated source of the trace mineral boron; supports bone and hormone metabolism, with the citrate carrier improving absorption over plain boron salts.
The dose“Is the dose actually effective?”Dose fit 90
Dose-range data is not available for this formula yet.
Boron Citrate
Studied window 3-10 mg · this pick 10 mg
The ranking“Why should I trust this pick?”Trust 78
Solid trust signals from buyer ratings, with room to grow. Each product gets a DoseRank score blending clinical strength, evidence, dose fit, trust and value. Retailer links may be affiliate links — the scoring model decides placement, never payment from a brand.
- 461 products scored
- Never paid placement
- Evidence level: Limited · 60
- 119 brands
- 4 ingredients
The price“Can I do better than $0.06 a serving?”Value 92
$0.06 per serving — low price tier for this outcome. The cheapest ranked pick here is $0.06 per serving.
- 6Nutricost, Boron, 5 mg , 240 CapsulesScore 65 · $0.06/servingiHerb
Why not the absolute cheapest? The DoseRank score also weighs clinical strength, evidence, dose fit and trust — the very cheapest listings rarely hold up everywhere else.
Ready?
The #1 pick is $0.06 a serving.Nutricost, Boron, 10 mg , 240 Capsules — in stock at a tracked retailer.
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Nutricost, Boron, 10 mg , 240 Capsules ranks #1 for Estradiol with a DoseRank score of 68. The score blends clinical strength, evidence, dose fit, trust signals and value across 461 products scored for this outcome.