日本語版

Siamese neem tree

organism / organism-azadirachta-indica-siamensis

サダオ / Siamese neem / Azadirachta indica var. siamensis

Thai neem (sadao). Young leaves and inflorescences are eaten as bitter vegetables.

Photographs (captions in Japanese)

濡れて光沢のある緑の若葉と、粒々の小さな花芽の房が密集した束が、赤茶色の木質の茎とともに横たわっている。茎の根元は輪ゴムで束ねられている。

サダオ(Azadirachta indica、タイのシャムニーム)の若い枝葉。細かい緑色の花芽の房と若葉が、木質の茎の根元で束ねられた状態で写っている。原典ページは『neem tree shoots, margosa shoots (Azadirachta indica)』と記載し、『Leaf vegetables in Thailand』に分類している。

写っているもの: Azadirachta indica部位・状態: 収穫直後の若い枝葉。小さな緑の花芽の房と若葉が木質の茎にまとまって束ねられている

写真: Susan Slater/ CC BY-SA 4.0/ 原画像/ 台帳の原画像

写真の範囲と来歴

被写体の確認: 原典の記載による同定。原典ページは学術種名を Azadirachta indica と記載し、変種名 siamensis の明記はないが、カテゴリ『Leaf vegetables in Thailand』からタイのサダオとして扱われている個体であることがうかがえる。専門家による再同定は行っていない。

掲載画像: Wikimedia Commons の原寸版。苦味研究所では切り抜き・色調変更なし。 表示用には幅1200px上限のWebPを配信し、台帳の原画像は上のリンクから確認できます。

On this page (9 sections)
  1. Overview
  2. Sources for this overview (3)
  3. Topic hubs
  4. Other names
  5. Follow the connections
  6. Related entries (10)
  7. Composition and content (3)
  8. How processing and cooking change it (1)
  9. Culture (2)
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Reading the bitterness

Thai neem (Azadirachta indica var. siamensis) is a tree called sadao in Thailand. Young shoots, young inflorescences, and young leaves are eaten. An article on a government-affiliated site lists young shoots and inflorescences together as edible parts. Separately, it records young leaves and flowers as having been used ethnomedically as a vegetable bitter tonic, or a bitter tonic vegetable.

A Thai research paper introduces neem flowers as one of the vegetables commonly consumed in Thailand, alongside fruits of Thai and Chinese bitter gourd and sweet basil leaves. This is background to a paper on an enzyme assay, however, not a study of food culture itself. The ethnomedical use as a bitter tonic vegetable likewise records a traditional use; the action described as health-promoting itself has not been confirmed in a human trial.

Sources for this overview

  1. 10 สมุนไพร ที่ปลูกทานเองที่สวนหลังบ้าน

    Surin Provincial Agriculture and Cooperatives Office / 2020 / government document / full text checked

    Checked for this overview: Confirmed the description of young shoots and young inflorescences as edible parts.

  2. Antioxidant activity of Siamese neem tree (VP1209)

    Sithisarn P; Supabphol R; Gritsanapan W / 2005 / journal article / abstract checked

    Checked for this overview: Confirmed the ethnomedical description of young leaves and flowers used as a bitter tonic.

  3. Effects of neem flowers, Thai and Chinese bitter gourd fruits and sweet basil leaves on hepatic monooxygenases and glutathione S-transferase activities, and in vitro metabolic activation of chemical carcinogens in rats

    Kusamran WR; Ratanavila A; Tepsuwan A / 1998 / journal article / abstract checked

    Checked for this overview: Confirmed the background description of neem flowers as a commonly eaten vegetable in Thailand.

Other names: sadao (th-Latn), สะเดา (th), SADAO (th-Latn)

Follow the connections

neem young shoots →is prepared from→ Siamese neem tree

neem flowers →is prepared from→ Siamese neem tree

neem leaves →is prepared from→ Siamese neem tree

Structured claims — open a section to read each claim's confidence, evidence and limits

Composition and content (3)

neem young shoots is prepared from Siamese neem treesupported

Scope: Edible young shoots of Thai sadao

Young shoots and young inflorescences of sadao are listed as edible parts.
Limitations: A reproduction of the original article, not an identification report based on plant specimens.
Source: 10 สมุนไพร ที่ปลูกทานเองที่สวนหลังบ้าน (Surin Provincial Agriculture and Cooperatives Office, 2020) · full text checked
Show dataingredient-neem-young-shoots —is_prepared_from→ organism-azadirachta-indica-siamensis
claim: clm-neem-shoots-from-siamese-neem / type: taxonomy / updated: 2026-08-31
neem flowers is prepared from Siamese neem treesupported

Scope: Young inflorescences of Thai sadao.

Note: The inflorescences are not treated as the same plant part as the leaves or young shoots.

Young inflorescences are listed as a plant part eaten together with young shoots.
Limitations: The scope of regional variation and botanical varieties is not given.
Source: 10 สมุนไพร ที่ปลูกทานเองที่สวนหลังบ้าน (Surin Provincial Agriculture and Cooperatives Office, 2020) · full text checked
Show dataingredient-neem-flowers —is_prepared_from→ organism-azadirachta-indica-siamensis
claim: clm-neem-flowers-from-siamese-neem / type: taxonomy / updated: 2026-08-31
neem leaves is prepared from Siamese neem treesupported

Scope: Young leaves of Thai neem

Note: The plant part is linked through existing ethnomedical contextual material.

An ethnomedical description states that young leaves and flowers of Thai neem are used as a vegetable bitter tonic.
Limitations: This is background to a phytochemical study, not a culinary survey.
Source: Antioxidant activity of Siamese neem tree (VP1209) (Sithisarn P; Supabphol R; Gritsanapan W, 2005) · abstract checked
Show dataingredient-neem-leaves —is_prepared_from→ organism-azadirachta-indica-siamensis
claim: clm-neem-leaves-from-siamese-neem / type: taxonomy / updated: 2026-08-31

How processing and cooking change it (1)

Siamese neem treeOne of the vegetables commonly consumed in Thailand (neem inflorescences). is eaten in these forms: supported

Scope: Thailand.

The paper explicitly states as background for its study: "four vegetables commonly consumed in Thailand, namely, flowers of the neem tree (Azadirachta indica var. siamensis), fruits of Thai and the Chinese bitter gourd..."
Limitations: The paper itself is a rat enzyme study, not a survey of food culture.
Show dataorganism-azadirachta-indica-siamensis —is_eaten_as→ "One of the vegetables commonly consumed in Thailand (neem inflorescences)."
claim: clm-sadao-vegetable / type: culinary / updated: 2026-08-31

Culture (2)

Siamese neem tree is used as An ethnomedical use of eating young leaves and flowers as a vegetable bitter tonic (a bitter tonic vegetable).contextual

Scope: Thailand.

Note: Does not assert clinical evidence for any health-promoting effect itself.

"This report supports the ethnomedical use of young leaves and flowers of this plant as a vegetable bitter tonic to promote good health".
Limitations: The effect of the "bitter tonic" itself was not shown in human trials.
Source: Antioxidant activity of Siamese neem tree (VP1209) (Sithisarn P; Supabphol R; Gritsanapan W, 2005) · abstract checked
Show dataorganism-azadirachta-indica-siamensis —is_used_as→ "An ethnomedical use of eating young leaves and flowers as a vegetable bitter tonic (a bitter tonic vegetable)."
claim: clm-sadao-bitter-tonic / type: cultural / updated: 2026-08-31
Siamese neem tree is documented as part of One of the vegetables on the Thai folk taste category 「รสขม(苦味)」 (in translation: "bitter taste (bitterness)") list in an HRDI article.contextual

Scope: A general-audience article from the Highland Research and Development Institute (HRDI).

Note: The list does not identify chemical bitter compounds; it includes folk accounts of effects (บำรุงโลหิต เจริญอาหาร ช่วยระบาย; in translation: "nourishing the blood, stimulating appetite, and helping bowel movements").

Context: รสขม มีสรรพคุณทางยา คือ บำรุงโลหิต เจริญอาหาร ช่วยระบาย เช่น มะระขี้นก มะแว้งต้น ลิงลาว ยอดหวาย ดอกขี้เหล็ก ใบยอ สะเดา เพกา มะขม (in translation: "The source attributes medicinal properties to bitter taste: nourishing the blood, stimulating appetite, and helping bowel movements. Examples include mara khi nok [มะระขี้นก], ma waeng ton [มะแว้งต้น], ling lao [ลิงลาว], rattan shoots [ยอดหวาย], khi lek flowers [ดอกขี้เหล็ก], noni leaves [ใบยอ], sadao [สะเดา], peka [เพกา], and ma khom [มะขม].")
Limitations: A list accompanied by folk accounts of effects, not a chemical identification of bitter compounds.
Source: ผักพื้นบ้าน...อาหารเป็นยา...รักษาสุขภาพ (สถาบันวิจัยและพัฒนาพื้นที่สูง (องค์การมหาชน)) · full text checked
Show dataorganism-azadirachta-indica-siamensis —is_documented_as_part_of→ "One of the vegetables on the Thai folk taste category 「รสขม(苦味)」 (in translation: "bitter taste (bitterness)") list in an HRDI article."
claim: clm-sadao-hrdi-bitter-category / type: cultural / updated: 2026-09-01

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