Taoist nutritional theory (part of Traditional Chinese Medicine) aligns surprisingly well with modern insights from nutritional science and microbiology. Although Taoist terminology speaks of Ki/Qi and Yin/Yang, we can easily translate these principles to science.
The Taoist emphasis on hot and prepared food (to spare the "spleen fire") is supported by thermodynamics and bioavailability.
Energy Consumption: The body needs to expend less energy heating food to body temperature and breaking down tough cell walls (cellulose).
Antinnutrients: Heating neutralizes substances such as phytates and lectins in grains and legumes, which can block the absorption of minerals.
Lycopene and Carotenoids: As mentioned earlier, heating makes these powerful antioxidants from vegetables much more absorbable.
This is one of the best-known long-term studies on a 100% raw diet. It demonstrates that a strict raw diet, despite the vitamins and minerals, often leads to underweight and amenorrhea (absence of menstruation), which supports the Taoist focus on energy efficiency (hot food). - C Koebnick , C Strassner, I Hoffmann, C Leitzmann; (1999), Consequences of a long-term raw food diet on body weight and menstruation: results of a questionnaire survey. Ann Nutr Metab.
The following study proves that heating tomatoes increases the lycopene content by 50 percent: heated tomatoes are, so to speak, healthier than raw tomatoes.
Just like lycopene in tomatoes, beta-carotene (the precursor to vitamin A) is trapped in the fibrous cell walls of the carrot. Cooking or steaming carrots softens these walls, allowing your body to absorb up to three times more beta-carotene than from raw carrots.
Raw spinach is full of oxalates (oxalic acid). These substances bind to minerals such as iron and calcium, preventing your intestines from absorbing them properly. Heating spinach, particularly when boiling it, reduces the oxalic acid content, allowing iron and calcium to become "free" for absorption.
Asparagus is a powerhouse when it comes to phenolic acids and antioxidants. Research shows that cooking asparagus can increase antioxidant activity by as much as 16% to 25%. The heat breaks the chemical bonds that hold these antioxidants.
It is a balance, though. While lycopene and beta-carotene (fat-soluble substances) benefit from heat, water-soluble vitamins such as vitamin C and B vitamins are actually lost when cooked in water.
Steaming is therefore the best option. You break down the cell walls (good for lycopene), but you do not wash the vitamins away in the cooking water.
A nice book is "Catching Fire: How Cooking Made Us Human" by Richard Wrangham. He explains that cooking increases the 'net energy yield' of food. The body simply consumes less energy to digest cooked food than raw food. This supports the Taoist 'Spleen Qi' theory.
The Taoist preference for fermentation is a bullseye when it comes to modern microbiome science. Probiotics: Fermented products (such as sauerkraut, kimchi, or miso) provide live bacteria that diversify the gut flora. Postbiotics: During fermentation, bacteria produce beneficial byproducts (such as short-chain fatty acids) that have anti-inflammatory effects and regulate the immune system.
Much research is currently being conducted into the power of fermented products. The initial results are promising, but scientists emphasize that much more research is needed to better map out the positive effects.
In Taoist teachings, colors represent different organs. Science translates colors into phytonutrients:
Purple/Blue (Anthocyanins): Strong antioxidants that protect brain function. * Yellow/Orange (Carotenoids): Crucial for the immune system and the eyes.
Green (Chlorophyll and Isothiocyanates): Support the liver in detoxification processes. - Michelle Blumfield, Hannah Mayr, Nienke De Vlieger, Kylie Abbott, Carlene Starck, Flavia Fayet-Moore, Skye Marshall. Should We ‘Eat a Rainbow’? An Umbrella Review of the Health Effects of Colorful Bioactive Pigments in Fruits and Vegetables. Molecules . 2022 Jun 24;27(13):4061.
The five flavors (sweet, sour, bitter, pungent, salty) ensure a broad nutrient intake:
Bitter: Scientific research shows that bitter substances stimulate the production of digestive enzymes and bile (the cephalic phase of digestion).
Satiety: A meal containing all flavors activates various receptors in the gut and brain, which often leads to a faster feeling of satiety and fewer "cravings" for specific sugar or salt. ### The "Strongness" of the Evidence Although we cannot fit the entire Taoist teaching into a double-blind controlled study, Nutritional Epidemiology supports the results. A diet rich in diverse plants (colors), prepared for optimal absorption, and supplemented with fermentation, correlates strongly with:
Higher diversity in the gut microbiome.
Lower inflammatory markers (CRP) in the blood.
Better blood sugar regulation. Thus, without a microscope, the Taoists had developed a system that maximizes digestion and optimally supports gut health.
In the section below, I regularly add updates such as newly published studies and how to view them from a TCM perspective.
In TCM, we see that the right balance of salt nourishes Kidney energy, but that an excess blocks the system. This article proves that at a microscopic level: the 'bridge' (MAM) between our internal energy factories gets damaged by salt stress. By eating unprocessed food, as we recommend in Eastern medicine, we prevent the buildup of 'Damp' in the cell, keep the mitochondria (our Kidney Yang) vital, and keep our energy level (Ki) in balance.
A small amount of high-quality salt "directs the energy to the Kidneys" and helps retain minerals and vitality. Classical texts (such as the Huangdi Neijing) have been warning for thousands of years that too much salt "constricts" the blood and impairs heart energy. The article now confirms this at the cellular level: too much salt disrupts MAM communication, leading to cardiovascular disease. Mitochondria produce ATP (energy), which in TCM terms is directly linked to Ki. The cited research shows that high salt levels disrupt the MAM and lower ATP production; essentially, this says: "Too much salt extinguishes the Kidney Yang fire." As a result, energy levels (Ki) become unbalanced, leading to fatigue and metabolic diseases.
Nutritional science according to Eastern medicine can consist of general advice, but if necessary, very precise advice is compiled based on the appearance of the tongue and face. I long missed this personal approach in the Western method, but there is gradually more attention being paid to it. For instance, this study shows that precision nutrition is promising for many Western conditions. General dietary advice often does not work optimally because everyone reacts differently to the same food. Metabolic diseases (such as obesity, type 2 diabetes, and fatty liver) arise from a complex interplay between environment, diet, and the microbiome. Precision nutrition attempts to tailor advice by combining all these factors. This aligns seamlessly with the idea from TCM that nutrition is strictly personal. Someone with weakness in Spleen energy, for example, receives very different advice than someone with Heat in Stomach energy.