Skip to main content
HairCited

緑茶エキス 男性型・女性型脱毛症(AGA)

C

合計150名の参加者を対象とした3件の研究に基づく。3件中3件の研究で肯定的な効果が示されている。

<\/script>\n
`; }, get iframeSnippet() { const domain = 'haircited.com'; const params = 'ingredient\u003Dgreen\u002Dtea\u002Dextract\u0026condition\u003Dandrogenetic\u002Dalopecia'; return ``; }, get activeSnippet() { return this.method === 'script' ? this.scriptSnippet : this.iframeSnippet; }, copySnippet() { navigator.clipboard.writeText(this.activeSnippet).then(() => { this.copied = true; setTimeout(() => { this.copied = false; }, 2000); }); } }" @keydown.escape.window="open = false" @click.outside="open = false">

Embed This Widget

Style



      
      
    

Widget powered by . Free, no account required.

C

結論

Green tea extract has very limited evidence for androgenetic alopecia — while early findings are positive, the research is too preliminary to draw meaningful conclusions.

  • Only 3 studies exist, with no randomized controlled trials
  • EGCG in green tea may have anti-androgenic properties relevant to pattern hair loss
  • The single interventional study used a multi-ingredient serum, not green tea extract alone
  • Much more research is needed before green tea extract can be recommended for hair loss

Key Study Findings

open-label single-arm interventional study n=150 8 weeks Open-label
Real-World, Open-Label Study of the Efficacy and Safety of a Novel Serum in Androgenetic Alopecia.
Dose: twice daily application vs: Placebo 効果: None None
Observational Study n=10 24 weeks Single-blind
An Open-Label Evaluator Blinded Study of the Efficacy and Safety of a New Nutritional Supplement …
Dose: Forti5 (green tea, omega-3/6, vit D, melatonin, etc) vs: baseline Outcome: terminal hair count and Hair Mass Index 効果: 5.9% hair count increase, 9.5% HMI increase 0.014

対象集団: Adults with androgenetic alopecia

In Vitro
Green tea in dermatology.
Dose: None vs: None Outcome: hair loss 効果: None None

対象集団: cancer patients

Key Statistics

5

研究数

160

参加者数

Positive

C

グレード

Referenced Papers

Dosage & Usage

mg = milligrams · mcg = micrograms (1,000× smaller) · IU = International Units

一般的な使用量

general:
250-500 mg/day (standardized to 50% EGCG)

上限量: 800 mg EGCG/day

研究で検討された用量

用量 期間 効果 N
not specified -- Positive --
twice daily application 8 weeks Positive 150
Forti5 (green tea, omega-3/6, vit D, melatonin, etc) 24 weeks Positive 10
None -- Positive --

推奨摂取タイミング: Between meals to minimize iron absorption interference; avoid evening doses

Safety & Side Effects

報告されている副作用

  • Liver toxicity at very high doses (rare but documented)
  • Stomach upset and nausea
  • Insomnia due to caffeine content
  • Iron absorption reduction

既知の相互作用

  • Blood thinners (EGCG may have antiplatelet properties)
  • Iron supplements (tannins in green tea reduce iron absorption)
  • Stimulants (additive caffeine effects)
  • Hepatotoxic drugs (additive liver stress at high doses)

耐容上限摂取量: 800 mg EGCG/day

サプリメントの摂取を開始する前に、必ず医療専門家にご相談ください。

Frequently Asked Questions

Does 緑茶エキス help with 男性型・女性型脱毛症(AGA)?
Based on 5 studies with 160 participants, there is limited but promising evidence that 緑茶エキス may support 男性型・女性型脱毛症(AGA) management. Our evidence grade is C (Some Evidence).
How much 緑茶エキス should I take for 男性型・女性型脱毛症(AGA)?
Studies have used various dosages. A commonly studied range is 250-500 mg/day (standardized to 50% EGCG). Always consult your healthcare provider before starting any supplement regimen.
Are there side effects of 緑茶エキス?
Reported side effects may include Liver toxicity at very high doses (rare but documented), Stomach upset and nausea, Insomnia due to caffeine content, Iron absorption reduction. Most side effects are mild and dose-dependent. Consult your doctor if you experience any adverse reactions.
How strong is the evidence for 緑茶エキス and 男性型・女性型脱毛症(AGA)?
We rate the evidence as Grade C (Some Evidence). This rating is based on 5 peer-reviewed studies with 160 total participants. The overall direction of effect is positive.

Related Evidence

FDAに関する免責事項: これらの記述は米国食品医薬品局(FDA)による評価を受けていません。本ウェブサイトの製品および情報は、疾病の診断、治療、治癒、または予防を目的としたものではありません。表示されているエビデンスグレードは、公開された査読済み研究の分析に基づいており、医療上の助言を構成するものではありません。サプリメントの摂取を開始する前に、必ず医療専門家にご相談ください。