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Warming/cooling food properties (TCM)

Traditional Chinese Medicine (TCM) gives every food and medicinal a thermal nature, usually described as cold, cool, warm or hot, judged partly by how it feels in the body: mint feels cooling and ginger warming. TCM food therapy holds that the hot and cold nature of the diet should be balanced, and that warming foods suit a cold pattern while cooling foods suit a heat pattern. Research linking these properties to measurable effects of foods is described by its own reviewers as insufficient, and a large Japanese cohort found no consistent link between hot-cold food intake and mortality. Hot-cold beliefs remain widely held and shape food choices in Chinese and other Asian populations. No claim reaches high or moderate certainty, because the only outcome evidence is observational, inconsistent across food classification lists, and comes from a single cohort and a single survey.

Evidence retrieved up to

What the research shows

In a large Japanese community cohort followed for 16 years, intake of hot or cold natured foods showed no clear or consistent association with all-cause mortality, and the direction of the association changed with the food classification list used.

Very low certaintyThis is uncertain; treat it as a lead, not a finding.
No known concerns at usual amountsNo clear effect

Who this is about

adults in a Japanese general-population cohort

Practical note

Graded very-low: a single observational cohort of 28,356 residents with 5339 deaths, so starting low, then downgraded for inconsistency because hot food intake in men was positively associated with mortality under one classification list and inversely under two others. A 2021 review also judged research linking cold-hot nature to food to be insufficient.

Sources

Beliefs about hot-cold balance in food choice are held by most adults of Chinese, Malay and Indian ethnicity surveyed in Singapore, most often among Chinese adults, and in experiments Chinese consumers chose hot-natured foods when imagining feeling cold because they perceived them as healthier in that state.

Low certaintyFurther research is likely to change this.
No known concerns at usual amountsUnclear

Who this is about

adults of Chinese, Malay and Indian ethnicity in Singapore; Chinese consumers

Practical note

Graded low: one cross-sectional online-panel survey of 787 adults, in which 72.4% of Chinese, 64.5% of Indian and 56.3% of Malay respondents held the belief, and one set of three choice experiments using imagined bodily states; consistent in direction but from two studies only. These describe beliefs and choices, not health outcomes.

Sources

What the tradition holds

TCM holds that foods, like Chinese medicinals, can be classified by a cold-hot nature, with warm and hot on one side and cool and cold on the other, and that this nature relates to what the food does in the body.

No known concerns at usual amountsUnclear

Who this is about

adults following TCM dietary principles

The tradition's frame

TCM

In TCM every food and medicinal has a nature on a scale from cold through cool and neutral to warm and hot, which describes the effect it is held to have on the body rather than its serving temperature.

Practical note

Food lists differ: the Takayama cohort used four different published lists to classify foods as hot, cold or neutral.

Vegan note

The classification covers plant foods throughout; ginger and mint are among the commonly cited examples.

Sources

TCM identifies the warming or cooling nature of an item partly by the sensation it produces when eaten, classing mint leaf as cold because chewing it feels cooling and ginger as hot because chewing it feels warming.

No known concerns at usual amountsUnclear

Who this is about

adults following TCM dietary principles

The tradition's frame

TCM

The nature of a food or medicinal was traditionally read from the sensation it produces in a healthy person and from its effect on people showing a cold or heat pattern.

Practical note

Dried ginger is described as used both as a food and as a herbal medicine, which places it on the border between TCM food therapy and herbal practice.

Vegan note

Both examples, mint and ginger, are plant foods.

Sources

TCM holds that balancing the hot and cold nature of foods in the diet is important to good health and counts it among the core principles of TCM food therapy.

No known concerns at usual amountsBenefit

Who this is about

adults following TCM dietary principles

The tradition's frame

TCM

TCM food therapy treats the diet as a whole that should be balanced in its hot and cold natures, alongside light eating, harmony of the five flavours and matching the diet to the person's state.

Practical note

The principle is stated in TCM texts and reviews; the one large cohort that tested hot-cold food intake against mortality found no consistent association, as the scientific claim in this entry records.

Vegan note

A balanced hot-cold diet can be built entirely from plant foods.

Sources

TCM uses warm or hot natured items for people showing a cold pattern and cool or cold natured items for people showing a heat pattern, and holds that giving hot items to someone with a heat pattern aggravates it.

No known concerns at usual amountsBenefit

Who this is about

adults following TCM dietary principles

The tradition's frame

TCM

Recorded in the Shennong Bencao Jing, the cold-hot rule pairs opposites: a person showing a cold pattern is given warming or hot items and a person showing a heat pattern is given cooling or cold items, while using a hot item in a heat pattern is held to make it worse.

Practical note

Cold and heat patterns are TCM diagnostic categories, not conditions defined in conventional medicine.

Safety note

The source applies this rule mainly to Chinese medicinals, some of which, such as processed aconite root, are potent herbs used by practitioners rather than everyday foods; this entry covers the food side only.

Sources