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Five-element seasonal living (TCM)

Traditional Chinese Medicine (TCM) links the five phases (Wood, Fire, Earth, Metal, Water) to spring, summer, late summer, autumn and winter, and to the liver, heart, spleen, lung and kidney, and holds that diet and daily life should change with the season, the person and the place, for example by nourishing the liver in spring. These are claims the tradition makes; no trial has tested following a five-element seasonal regimen. Studies of the testable premise, that human physiology changes with the seasons, find seasonal patterns in immune gene expression that are inverted between Europe and Oceania, and higher blood pressure in colder weather worldwide; only the blood pressure finding reaches moderate certainty. Seasonal TCM dietary care can include herbal ingredients, and some Chinese herbal products have been found contaminated.

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Evidence retrieved up to

What the research shows

In adults, the activity of thousands of genes in white blood cells and fat tissue varies with the season, with a more pro-inflammatory immune profile in winter, and the seasonal pattern is inverted between Europe and Oceania.

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

Who this is about

adults in cohorts in Europe, Oceania and The Gambia

Practical note

The study reported more than 4,000 protein-coding genes with seasonal expression profiles. Graded low: a single observational analysis, indirect to any seasonal routine.

Safety note

Descriptive observational finding; it shows that physiology changes with the seasons, not that any seasonal regimen changes it.

Sources

Blood pressure varies with the season, running lower in warmer weather and higher in colder weather, across both sexes, all age groups and people with or without high blood pressure.

Moderate certaintyFurther research may change the size of the effect.
No known concerns at usual amountsUnclear

Who this is about

people of all ages worldwide

Practical note

Graded moderate: observational evidence, upgraded for a consistent temperature gradient found across many populations; the source is an expert consensus review rather than a pooled meta-analysis. It concerns seasonal physiology, not the effect of any TCM seasonal regimen.

Safety note

People taking blood pressure medicine who notice symptoms as the weather changes should talk with their own health professional rather than change medicine themselves.

Sources

What the tradition holds

TCM associates the five phases with the seasons: Water with winter, Wood with spring, Fire with summer, Earth with late summer and Metal with autumn, and holds that health depends on adapting to seasonal and climatic change.

No known concerns at usual amountsBenefit

Who this is about

people following Traditional Chinese Medicine lifestyle practice

The tradition's frame

TCM

TCM holds that Qi cycles through five phases of transformation (Wu Xing) as yin and yang turn into one another, each phase nourishing the next and restraining another, and that human health emerges from staying in step with the climate and the seasons (human-environment harmony).

Practical note

TCM counts five seasons by adding late summer (also called long summer) to the four, so that each phase has a season.

Safety note

The correspondences are a traditional framework, not a finding; no trial has tested living by them.

Sources

TCM holds that the diet should change with the seasons to nourish the organ linked to each season: the liver in spring, the heart in summer, the spleen in late summer, the lung in autumn and the kidney in winter.

Take care: see the safety noteBenefit

Who this is about

people following Traditional Chinese Medicine dietary practice

The tradition's frame

TCM

TCM holds that each of the five Zang organs has its Qi most exuberant in its own season (liver in spring, heart in summer, spleen in late summer, lung in autumn, kidney in winter), and that foods and flavours linked to the phase of the season, such as sour for Wood and the liver, nourish that organ.

Practical note

One review gives the classical example that spring belongs to Wood and the sour flavour nourishes the liver. Its text says nourishing the spleen in summer; in the same passage the spleen is paired with long summer.

Vegan note

The seasonal logic of flavours and organs can be followed with plant foods; a 2024 Chinese guideline on autumn and winter dietary care lists a combination of meat and vegetables among its principles.

Safety note

Ordinary seasonal food choices are low risk, but TCM seasonal dietary care also recommends ingredients that are both food and medicinal materials. Some Chinese herbal products have been found contaminated with undeclared drugs, heavy metals or wrong herbs, so herbal ingredients are best sourced with care and discussed with a health professional by people who have a health condition or take medicines. No trial has tested this seasonal diet.

Sources

TCM holds that seasonal dietary care should be tailored to the person, the season and the place rather than applied as one fixed plan.

No known concerns at usual amountsBenefit

Who this is about

people following Traditional Chinese Medicine dietary practice

The tradition's frame

TCM

The TCM principle of three-factor adaptation holds that a regimen must fit the constitution of the individual, the time or season, and the local conditions, because the same season affects different people and places differently.

Practical note

The sources describe China. As a separate observation, not from these sources: in the Southern Hemisphere the seasons fall in the opposite calendar months, and a seasonal gene-expression study found patterns inverted between Europe and Oceania (see the seasonal immune gene expression claim).

Sources