Vitamin D and Iodine are similar, and both are deficient and important to health
Iodine Deficiency map
Red = low Iodine

Table comparing Vitamin D with iodine
| :: Vitamin D :: | :: Iodine :: | |
| Ancient History awareness | Egypt: sun improves health and bones | China: eating burned seaweed stops Goiter |
| 1830, 1930 | 1930 discover active ingredient in cod liver oil was vitamin D | 1830 Determined Iodine cured Goiter 1930: US added Iodine to salt |
| Fortification in the US | Add vitamin D2 to milk (later changed to D3) | Add Iodine to salt note: <5% of salt sold in UK is iodized UK had gotten it from milk until mid 1990's |
| Just enough fortification to prevent main disease | 10 micrograms (prevent Rickets) | 150 micrograms (prevent Goiter and cretinism) |
| Very low cost for fortification | 1 cent per person-year (approx) | 8 cents per person-year |
| Huge reduction in 40 years | 2X to 3X reduction | 4X reduction |
| Air conditioning, sunscreen, multi-media | Less Iodine in milk (no longer used on cows)
| indoor jobs, less cholesterol, more obesity reduced Magnesium and Omega-3 (both of which raise Vit D levels) | Less Iodine in bread (no longer used in processing)
| live in cities - which have less UVB | Increased use of Iodine blockers:
Fluoride Chlorine and Bromide (used in flour)
also perchlorate in some fertilizers (See 2014 PDF)
| increased used of farmed fish - which has 1/4 the Vit D
Increase use of low-fat milk, which provides less Vit D | 1) Use table salt much less
2)No Iodine in salt used in processed foods
3) half of iodized salt not meet requirements || Need to increase the intake | at least 2X increase | at least 2X increase || No fear of toxicity | 300 micrograms can be taken daily forever | US Tolerable Upper Intake = 1,100 mcg daily
Note: Japanese consume 50,000 mcg daily || No fear of overdose | Single day toxic level - 1 million micrograms | Single day toxic level 1 million micrograms || No fear of long-term consequences | Finland used 100 ug for decades ==> far less diabetes | Japanese have taken 50,000 micrograms daily for centuries || Deficiency effects many people | Flu, pregnancy problems, cognitive decline, diabetes, etc.
Proof that Vitamin D Works | Goiter; Fatigue; Weakness; Weight Gain; Mental Retardation,
low iodine is the leading cause of mental retardation || Delay in having govt increase levels of food fortification | Many decades for govts to increase fortification | Many decades for govts to increase fortification || Fortification which has proven useful | milk, bread, | milk, bread, water (China) || Individuals can improve health now | Supplement - add to food consumed - more sunshine | Supplement or add to food consumed
a single drop of Iodine a day is plenty || Does not accumulate in body | long term storage - weeks to months | long term storage - weeks to months || Vets use at least 3X more on mammals than US says humans need | Mammals need 3X to 4X more than humans | Rabbits need 5X more than humans, dogs need 20X more than humans || Loading dose | OK to 100X for a few weeks if need to re-stock | OK to 100X for a few weeks if need to re-stock || Deficiency testing - blood | Yes | Yes || Deficiency testing - free, not precise | Quick, FREE, self-test for Vitamin D deficiency | http://is.gd/iodinetest - need Iodine, results vary with temperature, etc - see below on this page |
6 reasons for decrease in Iodine (resulting in a 4X decrease in 4 decades)
Some countries do not require adding iodine to salt used commercially
People have been minimizing use of salt to reduce sodium in their diet
Iodine in salt dissapates in about 1 year
People are using salt from mines, mountains that is not iodized
Cow's udders are now cleaned with Bromine instead of Iodine
Iodine is no longer used in baking bread
Switzerland has greatly INCREASED the amount of Iodine in ALL of their salt over the past 60 years
3.75 mg/kg in 1975,
7.5 mg/kg in 1962,
15 mg/kg in 1980,
20 mg/kg in 1998 vs US 70 micrograms/gram = 70 mg/kg
Swiss fortify ALL salt, not just table salt.
Swiss Iodine intake may be >2X of that of US.
See also Vitamin D Life
Search Vitamin D Life for IODINE 236 web pages as of Aug 2024
Obesity pandemic since 1975 - is it due to Vitamin D, Magnesium, Iodine, adenovirus, or what
Obesity epidemic: a perfect storm of deficiency of vitamin D, Magnesium, Iodine, etc – May 2012
Thoughts on improving vitamin D policies - Vieth Nov 2013 1 chart showing history of Iodine fortification of salt
Typically takes a century for govts to fortify food with nutrients (like vitamin D)
Vitamin D, DHA, Folic, Iodine benefits during pregnancy – July 2012
Iodine added during pregnancy reduces preterm births, increases IQ. Etc.
Common deficiencies D3, Omega-3, K2, Mg, B12, E, A, Iodine, etc – Mercola Oct 2015
Efficacy and Safety of Iodine Fortification - Zimmerman (Swiss) chapter in 2018 book
- 📄 Download the PDF from Vitamin D Life
- Children - 2017

See also web
Iodine: An in-depth guide to its potential benefits Mercola Aug 2019
- The History of Iodine in Medicine Part I: From Discovery to Essentiality
- Extremely wide use of Iodine. 1,700 approved pharmacopoeial names assigned to iodine-containing products in 1956
- Same web source has 21 additional Iodine and Medicine publications, such as
- The History of Iodine in Medicine Part II: Thyroid Fixation and Medical Iodophobia
- US bread from 1960-1980 had 150 micrograms of grams of Iodine per slice
How Potassium Iodide Can Potentially Work for You Mercola Aug 2018
Iodine can prevent or help cure breast cancer Natural News July 2013
Iodine-Rich Foods Fight Breast Cancer GreenMedInfo Oct 2015
- Reduces estrogen, up-regulated 29 genes and down-regulated 14 genes in breast cancer cells
- Japanese women get about 25 times more iodine than US, But when Japanese women get U.S. diet BC rates jump to US rates,
- Iodine is blocked by chlorine and fluoride in drinking water, as well as bromine in flour, bread, and baked goods
- American Academy of Pediatrics recommend more Iodine during pregnancy May 2014 PDF is attached at bottom of this page
- minimum of 150 ug of elemental Iodine - note: virtually no prenatal supplement contains this much as of May 2014
Iodine Supplementation - 2009, but nice
Iodine and the Body Iodine Research - 2009?
- ". . . fluoride is in the same chemical family as iodine and can replace iodine in the body if the iodine is deficient."
- "Radioactive iodine injected into patients shows a full outline of the bones on a total body scan. This means one of the places iodine goes to immediately is bones."
- Research catgories: .Adrenals, Blood, Bones, Brain (CNS), Breast Introduction, Breast, Exocrine System, Eyes, Gastrointestinal, Heart, Hormones, Immune System, Kidneys, Liver, Lungs, Mouth. Ovaries, Pregnancy, Skin, Thymus, Thyroid, Vagina, Whole Body, AIDS, Cancer, Candida, Colds and Flu, Allergies, Diabetes, Heart Disease, Multiple Sclerosis, Lupus, Lyme Disease, Sjogren's Syndrome, Thyroid Disease
Japanese Iodine intake 1-3 mg per day - 2011
- includes interactions with medications for an overactive thyroid, Lithium, Ace Inhibitors, Angiotensin receptor blockers, water pills,
https://www.ukiodine.org/iodine-in-the-uk/ still not added to salt as of 2022]
- Iodine had been added to cow feed and had used as a dairy disenfectant, but no longer
See also web - Iodine tests
- How to Perform the Iodine Patch Test April 2015
- Author is not sure if it is reliable. Has a short video on patch test and a 1 hour video on Iodine Deficiency
- The Skin Patch Test for Iodine Deficiency
- This author is also unsure of the reliability of the patch test.
- Time for patch to disappear varies with temperature, pressure, etc.
- Dried Urine testing for Iodine ZRT labs $80 - also on Amazon
- Iodine and creatinine testing in urine dried on filter paper - Feb 2013
US Map areas with low Iodine in water closely matches Goiter areas (date ?)

_Seems likely that this will be the same region which will have low Iodine in the 21st century
- that people consume less Iodized salt, less Iodine from milk and bread, and more Bromine which blocks Iodine
30% of the globe has less than 100 micrograms of Iodine
Wonder what percentage of women have < 220 micrograms - which appears to be the minimum needed during pregnancy
The Need for Iodine Supplementation Othomolecular Medicine June 2017
"The variety of diseases for which iodine was prescribed in the early years is astonishing - paralysis, chorea, scrofula, lacrimal fistula, deafness, distortions of the spine, hip-joint disease, syphilis, acute inflammation, gout, gangrene, dropsy, carbuncles, whitlow, chilblains, burns, scalds, lupus, croup, catarrh, asthma, ulcers, and bronchitis - to mention only a few"
"The body requires iodine to metabolize both omega-3 and omega-6 fatty acids"
"Unfortunately, the recommended daily allowance (RDA) for iodine - about 150 mcg per day - will not allow delta-iodolactone to be efficiently formed in the thyroid gland. The thyroid requires higher iodine concentrations to efficiently produce it. Researchers have found that 100 times the RDA amount of iodine is optimal to produce delta-iodolactone."
Attached to the bottom of this page are notes on Iodine from the internet Feb 2012 and Jan 2013
Note: Water fllters which use reverse osmosis eliminate all Iodine and Magnesium
Iodine Fortification around the world

Many people are Iodine deficient, but especially vegans - 2020
Vitamin and Mineral Status in a Vegan Diet
📄 Download the PDF from Vitamin D Life
