Why Is Table Salt Iodized?

 Why was iodine added to salt?

Iodine is a trace mineral that the body needs to make thyroid hormones:

T3 (triiodothyronine)

T4 (thyroxine)

These hormones regulate:

Metabolism

Body temperature

Heart rate

Brain development

Growth

The thyroid gland cannot make these hormones without enough iodine.

What happened before iodized salt?

In many inland areas, especially places with iodine-poor soil, people did not get enough iodine from food.

The result was iodine deficiency disorders, including:

1. Goiter

The thyroid gland enlarges because it is trying harder to capture iodine.

Signs:

Enlarged neck

Difficulty swallowing (in severe cases)

Thyroid dysfunction

2. Brain and developmental problems

Severe iodine deficiency during pregnancy and childhood can cause:

Impaired brain development

Learning difficulties

Growth problems

Why use salt as the delivery method?

Scientists chose salt because:

✅ Almost everyone consumes it

✅ People use a fairly predictable amount

✅ Iodine can be added in very small, safe quantities

✅ It is inexpensive and stable

In the 1920s, countries including the United States began large-scale iodization programs.

The result:

Goiter rates dropped dramatically

Childhood development improved

Iodine deficiency became much less common

How much iodine do adults need?

The recommended intake for most adults is about:

150 micrograms (mcg) of iodine per day

Pregnancy:

220 mcg/day

Breastfeeding:

290 mcg/day

(Needs can vary depending on individual health.)

Sources of iodine:

🧂 Iodized salt

🐟 Seafood

🥛 Milk and dairy products

🥚 Eggs

Seaweed (very high, sometimes excessively high)

Important modern point:

Iodine is essential, but more is not always better.

Too much iodine can also affect the thyroid in some people, especially those with thyroid disorders.

Also, many people today consume less iodized salt because they eat more:

Restaurant food

Processed foods made with non-iodized salt

So a person may eat a lot of salt but still not get much iodine.

Simple takeaway:

Iodized salt is a small nutritional change that prevented millions of cases of goiter and protected brain development worldwide. It is an example of how understanding a tiny nutrient deficiency can create a huge public health impact.

7 warning signs of vitamin deficiency

 7 warning signs of vitamin deficiency

There are many cases of vitamin deficiency that start off as asymptomatic, making it particularly difficult for some to become immediately aware of the fact that they've got a nutrition problem; however, there are plenty of case in which the vitamin deficiency is marked by a number of key symptoms.

Because many of the symptoms of vitamin deficiency are shared by several slightly related conditions, it's easy for many people to get their wires crossed about determining exactly when vitamin deficiency is the key culprit.

While it's always advisable to consult your primary care provider to get any potential case of vitamin deficiency figured out with 100 percent certainty, the following are some of the most common recurrent symptoms to keep an eye out for.

Cavities

Vitamin A & D are essential for strengthening tooth enamel, and when they're not being taken in enough, the constitution and durability of the teeth will naturally start to decline.

Mental fog

Vitamin B-12 is one of the most important things that a person should be taking in on a regular basis to ensure that their nervous system is properly regulated. Without enough Vitamin B-12, subtle symptoms of mild confusion and slowed cognitive function can occur.

Skin rashes

Vitamin B-6 is highly helpful for the body's ability to keep the epidermis healthy, but without it, the skin's resilience can suffer by a fair degree. Less defensive capability in the skin cells can quickly lead to a greater susceptibility to rash outbreaks.

Fatigue

It's important to have a sufficient vitamin D intake level to keep the bones tough and capable of bearing the pressure of everyday activities for years on end. Not only does vitamin D deficiency open up the bones to much more damage susceptibility, but it's also oftentimes coupled by a persistent feeling of diminished energy.

Paleness and thinning hair

One of the most vital jobs that iron is responsible for in the body is to properly regulate oxygen transmission. Proper oxygen transmission is necessary for red blood cell synthesis, but without that, the body's skin and hair quality goes down by a huge degree. Thinning hair and paler-than-usual skin can be a subtle but sure sign of inefficient iron levels.

Inexplicable appetite reduction and weight loss

The body's proper weight regulation depends strongly on proper vitamin intake, with potassium and magnesium being two of the most essential for this job of all. Potassium is essential for correcting your metabolic regularity and magnesium plays a big role in creating a healthy appetite; when these two vitamins fall to inefficient levels, weight maintenance can spiral out of balance.

Nausea

Vitamins like niacin are vital for ensuring that the body's gastrointestinal functionality is kept in check. When vitamin deficient, it's common for a creeping sensation of stomach sickness to rise up over time and possibly continue unmitigated if the deficiency isn't corrected.

Summary

The challenge of keeping your body properly nourished today is easier to do than at any point in history, but at the same time, it can be very easy to fall off the wagon if you've got a busy schedule and are oftentimes under pressure to settle for convenience instead of eating full-course meals.

By staying on top of your awareness of the most likely symptoms above, you can at least take the first step towards becoming better: recognition of the issue. Once you've gotten ahold of the earliest signs of the symptoms, you'll be that much better at preventing them from getting much worse.

6 common warning signs of colon cancer that doctors pay attention to:

 1. Iron-deficiency anemia (low iron)

A tumor in the colon can bleed slowly over time. The blood loss may be too small to see, but it can cause:

Low hemoglobin-A blood test (CBC and iron studies) can detect this.

Important: Iron-deficiency anemia does not always mean cancer. It can also come from:

Fatigue

Weakness

Shortness of breath with activity

Pale skin

Menstrual blood loss

Low iron intake

Stomach ulcers

Other bleeding problems

2. Abdominal pain or discomfort

Colon cancer may cause:Cramping

Persistent abdominal discomfort

Bloating

A feeling that something is “not right”

Pain alone is usually not enough to diagnose colon cancer because many common conditions can cause similar symptoms:

Irritable bowel syndrome (IBS)

Gas

Constipation

Infections

3. Change in bowel habits

A new, persistent change such as:

Constipation

Diarrhea

Narrower stools

Feeling that you cannot completely empty your bowel

that lasts more than a few weeks should be evaluated.

4. Blood in stool

Possible signs:

Bright red blood

Dark or black stools

Hidden blood detected by stool tests

Not all colon cancers cause visible bleeding.

5. Unexplained weight loss

Losing weight without trying can happen because cancer may:

Increase the body's energy demands

Affect appetite

Change metabolism

6. Fatigue or weakness

This can result from:

Anemia

Inflammation caused by cancer

Poor nutrition

Sleep disruption

Who should be more alert?

Risk factors include:

Increasing age

Family history of colorectal cancer or polyps

Inflammatory bowel disease (Crohn’s disease or ulcerative colitis)

Obesity

Smoking

Heavy alcohol use

Low physical activity

Diet high in processed meats

Screening saves lives

For average-risk adults in the U.S., colorectal cancer screening generally begins at age 45.

Common screening options:

Colonoscopy (detects and can remove polyps)

Stool-based tests (such as FIT)

Screening can prevent cancer by finding and removing precancerous polyps.

Seek medical evaluation if you have:

✅ Blood in stool

✅ Unexplained iron-deficiency anemia

✅ Persistent bowel changes

✅ Unexplained weight loss

✅ Symptoms lasting several weeks

Early colon cancer often has better treatment outcomes, which is why recognizing symptoms and getting appropriate screening are important.

If cancer needs carbs (glucose) to grow, why don't doctors change people’s diets when the cancer is first diagnosed?

 Cancer cells do use glucose — but so do normal cells

Many cancer cells rely heavily on glucose for energy through a process called the Warburg effect.

 They consume glucose at high rates even when oxygen is available.

However, glucose is also essential for:

Brain cells

Red blood cells

Immune cells

Muscles during activity

Healing and recovery

The body tightly regulates blood glucose.

 Even if someone eats almost no carbohydrates, the liver can make glucose from:

Protein (amino acids)

Glycerol from fat

Other metabolic pathways

So a low-carb diet does not mean cancer cells receive zero glucose.

2. Why don’t doctors prescribe a ketogenic diet for everyone with cancer?

A ketogenic diet (very low carbohydrate, high fat) is being researched, but it is not proven to replace standard cancer treatments.

Possible problems during cancer treatment:

Weight loss and muscle loss can worsen outcomes, especially in advanced cancers.

Chemotherapy and radiation require the body to have enough energy and protein to repair tissues.

Some patients develop cachexia (cancer-related muscle wasting), where maintaining weight is a major goal.

For many cancer patients, the priority is:

✅ maintain strength

✅ preserve muscle

✅ tolerate treatment

✅ recover after surgery/chemotherapy

3. Could diet influence cancer risk or outcomes?

Yes, nutrition matters — but in a different way.

Evidence supports:

Maintaining a healthy body weight

Eating plenty of vegetables, fruits, legumes, and whole grains

Getting adequate protein

Limiting processed meats

Limiting excessive alcohol

Regular physical activity

These can reduce cancer risk and improve general health.

But there is currently no strong evidence that eliminating carbohydrates can cure cancer.

4. Are there situations where a ketogenic diet is studied?

Yes. Researchers are studying ketogenic diets in some cancers because lowering insulin and glucose availability may affect certain tumor pathways.

Early research has explored this in cancers such as:

Brain tumors (including glioblastoma)

Some breast cancers

Some metabolic-sensitive tumors

But results are mixed, and it remains an adjunct research approach, not a replacement for chemotherapy, immunotherapy, surgery, radiation, or targeted treatments.

5. Why did the doctors in the story advise against extreme dieting?

Because a newly diagnosed cancer patient often needs more nutritional support, not restriction.

For example:

A patient undergoing chemotherapy may need extra protein to maintain muscle.

A surgical patient needs calories for wound healing.

A person losing weight unintentionally may have a worse prognosis.

A balanced diet designed around the person's cancer type, treatment, symptoms, and nutritional status is usually recommended.

Cancer cells do use glucose, but “starving cancer by removing sugar” is not realistic because the body will still make glucose and cancer cells can adapt. 

The strongest evidence still supports medical cancer treatments plus good nutrition to keep the body strong enough to fight and recover.

For someone with cancer, a good question for the oncology team is not “How do I remove all sugar?” but rather:

“What eating pattern will help me maintain muscle, energy, and tolerate my treatment best?”