Sugar Feeds Thyroid
“Starving an animal with a tumor increases the stress hormones, providing free fatty acids and amino acids, and accelerates the tumor’s growth…it’s impossible to “starve a tumor,” by the methods often used. Preventing the excessive breakdown of protein and reducing the release of fatty acids from fat cells would probably cause many cancer cells to die, despite the availability of glucose…” – Ray Peat Phd
The idea that ‘sugar feeds cancer’ is very popular and has in recent times been heavily promoted. As a result of this many people have been convinced that it would be wise to remove sugar from their diet altogether.
Experimental evidence however, continues to show that not only is this not correct but that to do so is dangerous, likely resulting in the creation of conditions which promote the growth and spread of cancer – and its initial onset – as well as the development of many other diseases of stress and inflammation.
“…our current observations may also explain the close and emerging association between diabetes and cancer susceptibility…diabetes and fasting/starvation…are known to be highly ketogenic and…consistent with our current hypothesis that ketone production fuels tumor growth.”
Not long after removing sugar from your diet – once glycogen stores have been depleted – there is an increase in the release of the stress related hormones – cortisol and adrenalin – as well as the liberation of greater amounts of stored fat into circulation – as free fatty acids in the blood – in an attempt by the body to provide the fuel necessary for survival.
In order to replace the sugar previously being eaten, fat consumption is often increased. So called ketogenic diets have become popular, and it is common to hear it suggested that such an approach is useful for the prevention as well as even for the treatment of cancer.
“Cancer cells undergo metabolic reprogramming in order to produce biosynthetic precursors, such as ATP, lipids, nucleotides and amino acids, which are required to sustain the energy and substrate demands for rapid growth and proliferation…lipid metabolism emerges as a critical pathway for the maintenance of cell survival, growth and migration…”
Unfortunately ketone production in the body occurs in a state of stress and has been shown to ‘fuel’ the growth and metastasis of cancerous tumors. Rising levels of cortisol as well as the increased intake and release of fat into the blood (in particular the polyunsaturated fats) have been demonstrated in their own right to promote cancer development.
“We conclude that increased arterial blood plasma linoleic acid concentrations, caused by increased dietary intakes, specifically stimulate growth, lipid storage and linoleic acid metabolism in hepatoma…in vivo.”
Both cortisol and the polyunsaturated free fatty acids encourage inflammation as well as the rise in release of other inflammatory cancer promoting hormones such as serotonin, prolactin and estrogen. All of these substances are known to interfere with energy metabolism, suppressing thyroid function and digestion, promoting bacterial overgrowth and endotoxin release, as well as increasing lactate production.
“Recent data suggest that the metabolic switch toward deregulation of glycolysis may be an early and fundamental event in tumorigenesis…accumulation of lactate in solid tumors is a pivotal and early event in the development of malignancies.”
When thyroid metabolism and digestion is slowed, intestinal barrier function is reduced, and this allows excess bacteria as well as endotoxin (and other harmful substances) to pass into the blood stream placing stress on the liver – interfering with detoxification – and eventually helping to create a chronic and systemic state of inflammation and interference with cellular function.
Increasing levels of lactate are a direct consequence of this kind of stressed metabolic state – where sugar is not being provided in sufficient quantity, or is unable to be properly utilised by the cell – and lactate production is an important process in the development of the ‘cancer metabolism’.
“Lactate is probably the only metabolic compound involved and necessary in all main sequela for carcinogenesis, specifically: angiogenesis, immune escape, cell migration, metastasis and self-sufficient metabolism.”
Sugar consumption (for instance sucrose and fructose) assists thyroid function – and directly suppresses cortisol – protecting against the excessive release of the polyunsaturated fats from storage – helping to reduce inflammation – eventually lowering levels of the stress and cancer promoting hormones.
“Free fatty acids arachidonic acid and linoleic acid and their metabolites…were an estimated 1.8- to 3.3-fold greater in 37 patients with adenocarcinoma vs 111 patients without cancer… Concentrations…were similar in 18 patients with squamous cell carcinoma and 54 control subjects without cancer.”
“…we identify neutrophils as the main component and driver of metastatic establishment within the (pre-)metastatic lung microenvironment…Neutrophils have a fundamental role in inflammatory responses…we find that neutrophil-derived leukotrienes aid the colonization of distant tissues by selectively expanding the sub-pool of cancer cells that retain high tumorigenic potential.”
Sugar and its cortisol lowering effects directly protect against the breakdown of muscle tissue and the excessive release of certain amino acids – such as tryptophan, glutamine, methionine and cysteine – which can then become another factor intimately involved in enabling the spread and growth of cancer.
Although many ‘fad’ diets have a reputation for fast weight loss, much of this is the result of muscle wasting and the rapid release of stored fat into the bloodstream, both of which damage metabolism and promote and reflect the conditions necessary for the onset of cancer as well as inflammatory disease in general.
“The finding that amino acids together contribute the majority of cell mass is in agreement with the notion that cells are composed primarily of protein…the importance of rapid glycolysis and glutaminolysis for proliferating cells lies in an ability to generate metabolic products beyond biomass carbon.”
Even though cortisol has the potential to – at least in the short term – provide a certain amount of symptom relief and energy substitution, in the longer term when levels are chronically rising due to issues associated with metabolic stress, this kind of ‘benefit’ tends to be unsustainable, promoting more stress, degeneration, aging and eventually disease.
“Chronic stress induces signalling from the sympathetic nervous system (SNS) and drives cancer progression…Here we show that chronic stress restructures lymphatic networks within and around tumours to provide pathways for tumour cell escape…”
A number of studies have shown that the consumption of sugar has decreased rather than risen over the last few decades.
“Over the last half century in the United States, dietary LA [linoleic acid] intake has greatly increased as dietary fat sources have shifted toward polyunsaturated seed oils such as soybean oil…adipose tissue LA has increased by 136%…”
Environmental carcinogens – including radiation as well as toxic (and estrogenic) chemicals and poisons – have become ubiquitous. These factors in combination with a very large increase in consumption of the polyunsaturated fats (and the addition of numerous other poisonous ingredients added to foods) and exposure to many other lifestyle stressors are the most likely factors causing the rising incidence of cancer and related degenerative diseases.
From a genuinely biological perspective it looks like sugar restriction not only does not protect against cancer, but instead speeds up its development, encouraging its growth and worsening outcomes.
“Altered cellular metabolism is a hallmark of cancer…exosomes act as a source of metabolite cargo carrying lactate, acetate, amino acids, TCA cycle intermediates, and lipids; and these metabolites are utilized by recipient cancer cells for proliferation…”
A diet limiting overall fat intake, including sufficient protein – from things like skim milk and gelatin and a few other high quality sources – as well as plenty of sugar – from sweet, ripe, juicy fruits and fruit juices, honey and white sugar – is one reasonable approach to lowering cortisol and the polyunsaturated free fatty acids, reducing lactate and levels of circulating amino acids as well as other inflammatory substances, and might one day be accepted as being an important part of a scientifically rational approach to protection from the spread of cancer and a variety of related diseases.
“Lifestyle factors, including diet, play an important role in the survival of cancer patients…we show that a high-fat ketogenic diet…enhanced tumor growth potential…providing insights into the design of conceptualized “precision diets” that may prevent or delay tumor progression…”
“…we have demonstrated that pharmacologic inhibition of FAO [fatty acid oxidation] inhibited proliferation and sensitized human leukemia cells…to apoptosis induction…which supports the notion that fatty acids promote cell survival…results support the concept of FAO inhibitors as a therapeutic strategy”
It’s one thing to say that sugar feeds cancer because in some sense it does. Sugar is fuel for cells. But the consumption of sugar certainly isn’t responsible for the existence of cancer, nor is it behind the growth and spread of cancer. This has been confirmed in many scientifically valid ways. Regardless, lets just pretend for a second that sugar is to blame. Take sugar away and it will miraculously still be there, only this time it will bring trouble.
So just try to remember, sugar also feeds thyroid and it feeds the liver and it feeds metabolic function in general and when these things are working well, cancer is nowhere to be found.
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Image: Poster for Anti-Isis “International Daesh Cartoon and Caricature Contest” Iran 2015, Artist Unknown