A practical guide to Chao Mai Ya: what it is, how Traditional Chinese Medicine uses it, the classical formulas it appears in, and who should be careful with it.
Last reviewed Oct 28, 2026| Latin Name | Hordei Fructus Germinatus |
|---|---|
| Chinese Name & Pinyin | 炒麥芽 · Chao Mai Ya |
| Medicinal Part | Fruits and seeds |
| The item | Chao Mai Ya is the stir-fried germinated grain of barley. Dao Ya (rice sprout) and the raw sprout are not this drug. |
| Nature and channels | Neutral, sweet. Enters the Spleen and Stomach. Neutral sweet digests food, harmonizes the middle, and regulates milk. |
| Pharmacopoeia line | Digests food and harmonizes the middle; reduces milk secretion or supports milk flow. Used for grain stagnation, post-meal bloating, and milk-regulation needs. |
| Pattern cues | Post-meal bloating. Sour stale belching. Irregular stools. Thick tongue coat. Milk leakage with breast fullness. New milk that will not flow. |
| In this article | Chao Mai Ya versus Dao Ya. Stronger digestion and milk work versus gentle appetite-opening. Why the dose matters. Home drink and porridge. |
Chao Mai Ya (炒麦芽; Chǎo Mài Yá; Latin: Hordei Fructus Germinatus; English: stir-fried malt) is the dried germinated grain of the barley plant — the golden sprouted kernel slow-stirred over a small fire until it smells faintly toasted, the quiet helper elders reach for when children overeat and when nursing mothers need milk adjustment. It is neutral, sweet, enters the Spleen and Stomach channels, and its core actions are to digest food and harmonize the middle, and to reduce milk secretion or support milk flow. It is the gentle digestion herb for grain-heavy meals. The usual amount is 10–15 g for digestion, and larger — 60 g or more — for milk reduction, in a decoction. It does not need special decoction handling, and it steeps or cooks well.
It is not Dao Ya. Rice sprout is also neutral and sweet, but it leans to fortifying the spleen and opening the appetite, with a gentler digestion side and no milk-regulating work; this malt digests harder and also handles milk. It is not the raw sprout either; the raw form leans to opening the appetite, and the stir-fried form to digesting and milk work. In spleen-stomach yin deficiency without marked stagnation — a dry mouth, a red tongue without a coat — or with ample milk and no need to reduce it, using it on your own is a poor match. Bloating that keeps worsening needs a clinic first. Do not take it yourself for a long time.
It is used most often for three patterns:
Neutral and sweet, it is not a daily "digestion grain" to keep eating. Digesting and moving when there is no stagnation, or in yin deficiency, drains or dries instead of helping.
When too much food — especially grain — outruns the spleen-stomach, the belly fills, belching turns sour, and stools go irregular; when the milk needs to settle, malt in a larger dose eases the breast fullness. Chao Mai Ya is neutral and sweet. It digests the grain stagnation and sorts the milk, which is why it appears in Mai Ya Tang (Malt Decoction)–type formulas. It moves more than it holds. In yin deficiency without stagnation, or with ample milk and no reduction need, more makes it worse.
Chao Mai Ya is not a catch-all digestion or milk herb. In spleen-stomach yin deficiency without stagnation, with ample milk and no reduction need, or in pregnancy, using it alone is a poor match. Whether it belongs in a formula, and at what dose, should be decided by a licensed Chinese medicine practitioner after pattern diagnosis.
Identification & Quality Standard
Hordei Fructus Germinatus
Botanical Origin
The dried germinated fruit of Hordeum vulgare L. (Poaceae), stir-fried.
Production Regions
Produced nationwide.
Quality Requirements
Superior is yellowish, full, with sprouts.
Fusiform, 8~12mm long. Surface brownish-yellow, with one young sprout and remnants of rootlets. Hard. Fragrant, slightly sweet taste.
Classic texts and trade experience favor malt from several northern provinces, with climates suited to barley — moderate starch and steady sprouting — but quality still depends on variety, harvest time, processing, and storage. Chao Mai Ya is deep yellow with occasional scorch spots, brittle, a white break, a faint toasted smell, and a slightly sweet taste; the raw sprout is pale yellow with the germ visible and softer. The common look-alikes are sprouted grains of other cereals — wheat sprout has shorter, finer germs, rice sprout smaller oval grains and a fainter toasted smell — check before buying.
Sweet; NeutralSpleenStomach
Song-era doctors stressed the supplementing side — helping the spleen-stomach transport for weak bodies; Ming-Qing doctors leaned on the digesting side — for excess food stagnation; some noticed the two-way milk action — reducing and supporting, always tied to pattern and pairing, never a lone solution to everything.
Traditional Functions
Moves qi and promotes digestion, fortifies the spleen and stimulates appetite, returns milk and reduces distension.
(1) Traditional action: sorting the spleen-stomach's food stagnation, especially from grain, and restoring normal transport. (2) Typical patterns: post-meal bloating, belching with a sour stale taste, irregular stools — loose or bound — and a thick tongue coat. (3) Usual pairings: Shan Zha (hawthorn) to strengthen the digesting; Chen Pi (tangerine peel) to free the qi; for a weak spleen-stomach with stagnation, Bai Zhu and Fu Ling to protect the spleen. (4) Not for self-use: spleen-stomach yin deficiency without marked stagnation — dry mouth, red tongue without a coat — the moving can add to the dryness.
(1) Traditional action: two-way milk regulation — helping reduce secretion when breastfeeding ends, and helping support flow when new milk will not come. (2) Typical patterns: ending breastfeeding — breast fullness, milk leakage; or post-partum milk not flowing with soft, non-full breasts. (3) Usual pairings: for reduction — a large dose of raw or stir-fried malt, with external application for the breast fullness; for flow — herbs that free the channels and support milk. (4) Not for self-use: ample milk with no reduction need — the malt can affect normal supply; or post-partum no-milk with red, swollen, hot, painful breasts — that picture needs a different approach, not malt alone.
Chao Mai Ya pairs classically with Chen Pi: the malt digests the grain stagnation and harmonizes the middle; the tangerine peel regulates qi and fortifies the spleen — keeping the qi running so the digesting does not leave stagnation behind. Together they suit food stagnation with mild belly fullness. This pair belongs to a practitioner's pattern diagnosis — no self-pairing.
Modern research offers useful context, but Traditional Chinese Medicine prescribes on whole-pattern diagnosis rather than isolated compounds.
Detected in the sprout are amylase, maltose, dextrin, proteases, small amounts of B vitamins, amino acids, and flavonoids. In vitro, the amylase helps break down starch; in animals, extracts mildly promote gut movement. These results come from specific experimental conditions — not equal to human digestion effects. No sufficient human clinical conclusion exists yet.
Current work centers on the digestion-related components and the potential milk-regulating effect. The amylase breaks down starch efficiently in vitro; milk output shifts somewhat in lactating animals given extracts — not transferable to people. More human research is needed, including how different processing changes the components.
Nature and flavor: both are neutral and sweet, entering the Spleen and Stomach — but Chao Mai Ya is firmer, slightly warm after stir-frying with a toasted note, while Dao Ya is softer and lighter in freeing. Focus: Chao Mai Ya digests harder — strong on grain stagnation — plus the two-way milk work; Dao Ya fortifies the spleen and opens the appetite — gentler digestion for a weak spleen with light stagnation, no milk work. Tendency: Chao Mai Ya frees the spleen-stomach's stuck qi with a light rising-scattering edge, pushing food transport; Dao Ya supplements the spleen and helps transport return — gentle, without a marked rise or fall. Best fit: Chao Mai Ya for clearer stagnation with heavier bloating, and for milk needs; Dao Ya for a weak spleen with light stagnation — poor appetite, mild post-meal bloating — good for long gentle care. Who should avoid: Chao Mai Ya is wrong for spleen-stomach yin deficiency without stagnation, and for ample milk with no reduction need; Dao Ya has fewer cautions but is wrong for marked spleen-stomach damp-heat — a thick yellow greasy coat. Where you meet them: Chao Mai Ya in stronger digestion formulas — Bao He Wan (Preserve Harmony Pill) sometimes includes it — and as a lead herb for milk reduction; Dao Ya in daily spleen-care porridges and pediatric formulas, being gentle for children.
In short, Chao Mai Ya digests harder and regulates milk; Dao Ya gently fortifies the spleen and opens the appetite. Both can appear in food-stagnation care — but they are not stand-ins for each other.
Role of this herb: in Mai Ya Tang (Malt Decoction), Chao Mai Ya is the monarch — digesting food and harmonizing the middle — with Shan Zha and Shen Qu as ministers strengthening the digesting, and Chen Pi as assistant freeing the qi. Alone, the malt's force is thin against clearer stagnation, and it cannot also free the qi and fortify the spleen. Traditional focus: food stagnation — belly fullness, sour belching, irregular stools. Modern note: professional diagnosis first — never self-apply by name.
Role of this herb: in Hui Ru Mai Ya Jian (Milk-Reducing Malt Decoction), Chao Mai Ya is the monarch at a large dose — the core of the milk-reducing work — with Chao Shan Zha as minister helping digest and move blood so the milk does not pool, and Fu Ling as assistant fortifying the spleen and easing the breast fullness. Alone, a large dose of malt can reduce milk, but the small qi-moving and blood-moving partners ease the breast pain better. Traditional focus: ending breastfeeding — milk leakage, breast fullness and pain. Modern note: professional diagnosis first — doses and pairings are adjusted by a practitioner, no self-application.
A formula is a coordinated team — monarch, minister, assistant, and guide covering the core and the support at once; a single herb cannot copy that, its action being single and unable to cover the qi-freeing and spleen-fortifying support. The doses and ratios are designed as a whole — do not self-formulate from web articles, which rarely match a personal constitution and pattern.
Example 1 — Chao Mai Ya hawthorn drink: Chao Mai Ya 10 g, Shan Zha 5 g, Chen Pi 3 g — rinse, steep in boiling water, cover, 15 minutes; can re-steep until faint. Fit: mild everyday food stagnation — light post-meal bloating and belching, especially after grain-heavy meals. Not for: spleen-stomach yin deficiency with a constant dry mouth, or ample milk with no reduction need. Frequency: 1–2 times a week, not frequent. Example 2 — Chao Mai Ya porridge: Chao Mai Ya 15 g gauze-wrapped, rice 50 g — cook into porridge, remove the pouch when done. Fit: a weak spleen-stomach with poor appetite and light stagnation — a breakfast choice. Not for: marked spleen-stomach damp-heat with a thick yellow greasy coat. Frequency: 1–2 times a week. Chao Mai Ya is a medicinal piece — buy the processed form from a proper pharmacy, do not substitute ordinary grain.
The raw sprout leans to fortifying the spleen and opening the appetite — for weak bodies; Chao Mai Ya leans to digesting and milk work — for stagnation or milk needs. At home, no special handling — steep or cook directly; no first, last, or wrapped steps. Different forms cannot be converted directly — 10 g of pieces and 10 g of extract are not the same.
The classic range is 10–15 g for digestion; milk reduction needs a large dose — usually 60 g or more. Food-use amounts are 5–15 g. Not for long continuous use — stop when the stagnation settles, no more than 1 week straight; for milk reduction, 3–5 days usually suffices. Pregnant women, nursing mothers, and children consult a practitioner or pharmacist first.
Spleen-stomach yin deficiency without marked stagnation — a dry mouth, a red tongue without a coat — the moving can add to the dryness; pregnant and nursing women — especially with ample milk, to protect normal supply; children and the elderly — adjust the dose under guidance; liver or kidney impairment — avoid self-use; allergy to barley or grass-family plants — avoid; people on anticoagulant or blood-sugar medicines — consult a doctor first.
No blanket "food clash" with ordinary foods is established, but herbs can interact with specific medicines. The amylase may affect the absorption of some medicines — such as pancreatic-enzyme preparations, taken together possibly lowering their effect; anyone on anticoagulants, blood-pressure, or blood-sugar medicines should consult a doctor or pharmacist first.
Reactions are usually few; overuse can bring stomach discomfort or worse bloating, especially in a weak spleen-stomach. Stop and seek care at once for marked discomfort, an allergic reaction such as rash or itching, persistent vomiting, trouble breathing, confusion, or a rapid worsening of symptoms.
Medical Disclaimer — This article is provided for educational purposes only and describes traditional Chinese medicine concepts. It is not medical advice, and it is not intended to diagnose, treat, cure or prevent any disease. Always consult a qualified practitioner before using any herb, particularly if you are pregnant, nursing, taking medication or managing a diagnosed condition.
