Fasting has been widely cherished in the spiritual realm since the ancient days of the Messiah, when the Son of Man fasted for 40 days, as many Christian books state.

However, few know that fasting is also beneficial to the human body and can cure plenty of inflammatory diseases, including those that have no known cure, such as cancer.

According to the US National Centre for Biotechnology Information, the idea of fasting as a cancer breakthrough is compelling, but it remains a complementary approach rather than a standalone solution in oncology.

Few hospitals will encourage you to go this route, because they stand to lose income from the sale of drugs. For a cancer patient, fasting is the only cure, but few medics will advise you to take this particular route. Cancer itself is an inflammatory disease.

The tumours of cancer cells are always dependent on glucose for growth and multiplication. When one fasts, it deprives the cells of glucose, which enables them to multiply, hence hampering their growth.

Stages of fasting

During fasting, in the first 4 hours, the body is in an anabolic stage; it depends on glucose obtained from the last meal. After this glucose is used up, that is, after about 4 hours, the body enters the catabolic stage.

During this stage, there is fat breakdown; the body is no longer dependent on glucose. It switches from glycolysis to ketosis, which is a result of fat breakdown to produce ketones. Cancer cells do not use ketones as a source of energy.

This normally occurs after about 16 hours of fasting when the body is fully using ketones. At 24 to 36 hours, the body enters the autophagy stage here; old and damaged cells, which might be cancerous, begin getting destroyed.

By 48 hours, the body is in full autophagy and deep ketosis. There is massive loss of old cells, and the bone marrow generates new cells to replace the lost ones.

Stages of cancer

When the process is continued for a long time, it becomes difficult for cancer cells to continue replicating.

The initial cancer stages are reversed since, according to cancer staging, in the initial stage, the cancer cells are limited to the affected organ. For example, in cervical cancer, the tumours are only on the tip of the cervix.

In the second stage, the tumour expands to surrounding organs; in the third stage, the tumour may occupy the whole pelvic region; and in the fourth stage, the tumour cells metastasise to distant organs such as the heart, lungs, or brain.

With fasting, the initial stages of cancer are shed off. It is normally advised for a cancer patient to fast for at least 21 days. Although there will be massive weight loss, it will help hamper the spread of the tumour.

One might argue that such a person could die of hunger; nothing is further from the truth. Hunger is a perception. The body depends on glucose or ketones that are produced from the breakdown of accumulated fat.

Management of hunger during fasting

During fasting, the body is high on ketones. Once the body switches to ketosis, hunger is lost. The hormone that stimulates the feeling of hunger is only activated at first.

 Fasting might be hard initially because the body is overdependent on glucose, but once it adapts to ketosis, it becomes easier.

 One can even do heavy workouts while fasting for long hours since there is plenty of energy being produced.

This does not apply only to cancer; it also applies to other diseases that result from inflammation, such as autoimmune diseases, asthma, ulcers, diabetes, and many other conditions.

Research

Periods of fasting reprogram the immune system’s natural killer cells to better fight cancer, according to a new study in mice from researchers at Memorial Sloan Kettering Cancer Centre (MSK).

Fasting and other dietary regimens are increasingly being explored as ways to starve cancer cells of the nutrients they need to grow and to make cancer treatments more effective.

Now, a team of researchers from MSK’s Sloan Kettering Institute and their collaborators have shown for the first time that fasting can reprogram the metabolism of natural killer cells, helping them to survive in the harsh environment in and around tumors, while also improving their cancer-fighting ability. The study, led by postdoctoral fellow Rebecca Delconte, PhD, was published on June 14 in Immunity.

Natural killer cells, or NK cells for short, are a type of white blood cell that can kill abnormal or damaged cells, like cancer cells or cells infected with a virus. They get their name because they can destroy a threat without ever having encountered it before — unlike T cells, which require prior exposure to a specific enemy to mount a targeted response.

In general, the more NK cells that are present within a tumor, the better the prognosis is for the patient.

For the study, mice with cancer were denied food for 24 hours twice a week, and then allowed to eat freely in between fasts. This approach prevented the mice from losing weight overall, the authors note.

But these periods of fasting had a profound effect on NK cells.

Just as happens in humans, the mice saw a drop in their glucose levels and a rise in free fatty acids, which are lipids released by fat cells that can serve as an alternative energy source when other nutrients aren’t present, Dr. Delconte says.