Every time you peel a grapefruit, do you do the same -- three, five, two, take off that thick yellow skin, eat the fruit and throw it in the trash
This throw may have thrown away the most underestimated “medicine treasure” on the grapefruit。
In guangdong, those who know how to use the skin of grapefruit as a baby — to make soup, cook vegetables, make meat — not only to clean their stomachs, but also to produce good food together. Modern scientific research has found that there is a solid scientific foundation behind this: the white part of the grapefruit skin is rich in grapefruit, which not only reduces fat sugar, but also increases sensitisation, reverses tumor resistance and inhibits multi-cancer cell proliferation。
Today, let's talk about the "cancer helper" that was thrown away。
What's in the grapefruit skin
The skin of the grapefruit is two layers: the outer gold is the omelet, rich in aromatic oil, and the inner white sponge is the “fruit skin”, which is the most nutritious part。
This layer contains a unique acetone-like compound - afruit skin. Grapefruit in a human being is transformed into its aphrodisiac form of grapefruit, which is the main actor in real biological activity。
The acetone is a “chromosomal acetone” in the acetone-like compound, mainly in citrus fruits. In particular, the researchers noted that since citrus acetone is mainly present in the inner layer of the fruit sheet, it is usually discarded when eating oranges and grapefruit, and therefore is often under-ingestion。
In other words, the white layer you dropped is exactly where the acetone compounds are most concentrated in the whole grapefruit。
Anti-cancer potential: what can a grapefruit do
Over the past decade, there has been a proliferation of cancer-resistant studies on grapefruit/fruit pesium. An overview system published in 2025 summarizes the cancer resistance of grapefruit: it inhibits various cancers, including liver, breast, thyroid, prostate, colon, bladder, cervical, lung, ovarian, brain, melanoma and leukaemia。
Specifically, grapefruit works mainly through:
Sensitization therapy to re-sensitize tumours of “resistant”
This is one of the brightest effects of grapefruit。
Rubber mother-celloma is the most lethal brain tumor, and the current standardized cure is amoxin. The problem, however, is that many patients quickly produce resistance to the accelerant, leading to treatment failure。
A study conducted in 2024 found that the combined use of aphids and amphetamine significantly enhanced the latter's lethal effects on the adhesive mother cell cells. The mechanism is that the curvature inhibits dna repair enzymes in tumour cells — parp-1 and mgmt — which are the key molecules of tumours that produce antitoxin。
Another study in 2021 concluded the same: grapefruit is effective in inhibiting parp-1, creating synergies with the use of amphetamine and significantly increasing cancer rates。
In short, the grapefruit can “turn off” the self-remediation of tumor cells, making it easier for chemotherapy to kill them。
2. Anti-tumour multidrug resistance
Oncular cells also have a subtle skill - they have a “pump” called “p-gp” on their surface, which can rept the chemotherapy that enters the cell, leading to insufficient concentration and failure of treatment。
A study of euphemism found that more active derivatives can be obtained through structural modifications of euphemism, which can effectively inhibit p-sugar proteins and thus reverse the multidrug resistance to tumors. Although this is a derivative of euphemism, it indicates that the skeleton of the compound itself has the potential to overcome resistance。
3. Direct inhibition of breast and colon cancer cells
In 2024, an overview system summarized the role of euphemism in breast cancer. It has been found that euphemism regulates multiple signal routes, inhibits breast cancer cell proliferation, induces death, inhibits transfer and creates blood vessels。
In the case of colon cancer, studies have also shown that euphemism inhibits the growth of colon cancer cells by inhibiting pi3k/akt/mtor signals。
4. Inducing cavity of oral cancer cells death
A study of oral cancer in 2024 found a significant decline in cell activity following the treatment of oral cancer cells by euphemism, with an inhibition concentration of 125. 3 μm/ml (ic50). The treated cells have typical characteristics of decay, such as dyed condensation and nucleus. At the molecular level, the expression of the cancer-promoting genes bcl-2, tgf-beta, smad2, tnf alpha, nf-100b has been adjusted downwards for the skin-promoting genes bad, bax and case-3。
The study concluded that the cascading of grapefruit by regulating the smad2 signal route contributed significantly to the death of oral cancer cells and inhibited cell transport。
Needing rationality: in vitro research works
Seeing here, you might be ready to go to the market and hoard grapefruit. But there are a few key points to make clear:
First, this is in vitro/animal research。
Most of the above studies were based on high concentrations of grapefruit extracts that directly affected cancer cells or were used in animal models. There are no precise conversion data available on the amount of grapefruit skins that the human body can eat to achieve an effective concentration after digestion and the experimental effects。
Second, the bioavailability of grapefruit。
Absorption and metabolism in the body are complex. It needs to be disaggregated by intestinal clusters into smaller molecules to be absorbed. The intestinal strains vary from one person to another, as does the utilization of grapefruit。
Thirdly, there is no substitute for normative treatment。
No food can replace drugs and regular treatment. The function of grapefruit is “subsidiary” and not “subsidiary”. If a patient undergoing chemotherapy is trying to eat grapefruit skin, it is best to consult the attending physician and avoid an unknown interaction with the drug。
How can cantonese eat grapefruit
Forget cancer, grapefruit skin is itself a traditional food. The cantonese know best about it - not only not to throw, but to make soup and cook。
Classic one: grapefruit skin and flowers
The grapefruit skin removes the outer yellow and hard skin, leaving only the white part of the sponge, slices
Boiled in cold water, dry water, 2-3 repeats
I'm gonna make some oil out of five flowers and add garlic and soybeans
Put it in the skin of the grapefruit for 20 minutes
Juice is enough
The grapefruit skin is full of gravy like sponges and has softer tastes than meat。
Classic two: grapefruit skin soup
The cantonese people like to make soup with grapefruit, especially with chickens and ribs. A grapefruit skin absorbs the fat from the soup, makes the soup brighter, releases the incense and helps digestion。
Dealing with tips:
Attention: two categories of people to be aware
The grapefruit skin is good, but not for everyone:
1. Care to be exercised by persons taking drugs
A grapefruit (including grapefruit skin) contains furan fragrance-like compounds that affect the activity of the liver pharmaceutical metabolic enzyme cyp3a4 and thus the metabolism of polydrugs. Those who are taking depressants, defaminants (hexatins), tranquillizers, anti-heart disorders are advised to consult a doctor before eating grapefruit skin。
2. Few people with weak gastrointestinal functions eat
The grapefruit skin is rich in food fibre and difficult to digest. Don't eat too much at a time for people with bad stomachs, so they don't get sick。
3. Cleaning is thorough
The skin surface of a grapefruit may contain pesticide residues or protective wax, and be carefully washed with salt water or small soda before cooking。
Summary
The grapefruit skin, the “waste” that most people have customarily thrown out, is actually the most nutritious part of the grapefruit. It is rich in grapefruit and has demonstrated in recent studies the desired potential for cancer resistance — particularly in the areas of sensitization therapy, tumour resistance, breast and colon cancer cells。
Of course, you can't expect to fight cancer with a few grapefruit skins. But turning it from an after-cooking piece of junk to a good taste on the table is both a respect for food and a gift to the body — at least you've taken some more scientifically sound ingredients。
Next time you peel a grapefruit, remember to leave that white tweezer and make a pot of meat and soup according to cantonese methods。
(this is a health science programme for reference purposes only. Patients in the process of taking medication are asked to consult a doctor before eating them
References:
A updaed review review reviewing the anticancer portential of naringeninImmune disord drug targets, 2024
Nitrogen-coSpeaking naringenin derivatives for reviving multidrug research in cancel
Therapic roll of naringin in cards: mobile pathways, synergy with other agents, and nanocarrier innovations's archives of pharmacology, 2025
Bisht p, too. Naringin and telezolomide communication
Restoring chemo-sensitization to tamzolomide via targeed within parp-1 by naringin in gliobrastoma
Naringenin as productive anticipator phytocompunded in black carcinoma
Yang y, et alNourr biochem, 2022
Exploding the crystal and anticancer portential of narin on oral cancel cell line
