Boron for Health

By Cat, July 2012 (duplicated on, Oct 2018); Image, right, from Amazon (1)

Growing up in the 50s and 60s, I am very familiar with the 20 Mule Team Borax ads for the TV show “Death Valley Days” hosted by Ronald Reagan (long before he became president).

But this posting is not so much about borax’s cleaning abilities, but rather about its health benefits when taken internally. Remember that borax is not a soap or detergent, but rather a salt of borax (sodium borate), mined from the deserts of California and Turkey. A box of 20 Mule Team Borax  is pure enough to ingest. According to Walter Last, it is 99% pure (990g/kg borax), and is safe to use; it is the legal standard for agricultural grade borax.

The majority of information on this and related pages is a paraphrase of Walter Last’s The Borax Conspiracy. However, I’ve added a few notes of my own or from other sources – see numbered references throughout the article. I’ve also saved his article as a pdf file, in the event his article is lost: Borax as a Supplement (pdf), a pdf version of this page (originally Chapter 1 and Chapter 2 on my old health website), but without my notes.

I am not a doctor and am not qualified to advise you on your specific health situation.

Borax Introduction: 

Soil deficient of borax can cause health issues for plants, and hence for animals and humans who consume those plants.. (See for more). For this reason it may be prudent to take supplemental boron.

NOTE: see Maryland Cooperative Extension: Soil Amendments or (click on the “Boron” link) for using borax in your garden.

Too much boron could be problematic, tho (see Toxicity, below), so keep track of your intake. 3 mg/day of ionic boron (B+3) is optimum for healthy individuals, according to Walter Last. (See Borax as a supplement section below for more detail on dosage)

However, it is far less expensive, and perhaps more effective, to use borax from the laundry section of your grocery store. Walter describes how to prepare this for ingestion (don’t just swallow the powder).

The information on this and related pages is a paraphrase of Walter Last’s The Borax Conspiracy (although I’ve added a few notes of my own). I’ve also saved his article as a WebArchive file, in the event his article is lost, I’ve saved it as a pdf: Borax as a Supplement (pdf), a pdf version of this page (as Chapter 1) and the following page (as Chapter 2).

Overview of Health Benefits of Boron

Boron is an essential trace element for humans, and is available in several forms:

  • Present in unrefined sea salt, and in trace element supplements made from sea salt;
  • Mined as borax – yes, that laundry additive from 20 Mule Team and other brands;
  • Boric acid is made by mixing borax with acids such as hydrochloric acid, then removing the sodium chloride (salt) byproduct of that reaction;
  • Synthetically chelated by citrate, aspartate or glycinate for use in supplements.

The most abundant form of naturally-occurring boron is as borax, which is a salt of boron. It can be converted to boric acid by mixing with an acid such as hydrochloric acid. Most supplements provide boron in chelated form.

Essential benefits of boron in the human body:

  • Essential for  the integrity and function of cell walls, including transmission of signals across the cell membrane
  • Essential for healthy bone and joint function by regulating the absorption and metabolism of calcium, magnesium and phosphorus through its influence on the parathyroid glands. These glands cannot function properly without adequate boron, just as the thyroids cannot function properly without adequate iodine.
  • Affects metabolism of steroid hormones, especially sex hormone: increases low testosterone levels in men, and estrogen levels in menopausal women.
  • Has a role in converting vitamin D to its active form. This in turn increases calcium uptake and deposition into bones and teeth (as opposed to calcification of soft tissues).
  • Redistributes calcium deposits from soft tissues to bone and teeth (when adequate magnesium is present), thus reversing osteoarthritis and hardened arteries.

Other benefits of boron:

  • Borax (and boric acid) have good antiseptic, antifungal and antiviral properties, but only mild antibacterial action.
  • Its antifungal action is very effective against candida problems.
  • Improvement of heart problems, vision, psoriasis, balance, memory and cognition.
  • Helps to rid the body of fluoride accumulation, and of toxic heavy metals.
  • Boron compounds, in general have anti-inflammatory and anti-tumor properties; and are anti-coagulant (‘blood-thinning’), anti-neoplastic (anti-cancer) and hypolipemic (reduce fats and cholesterol in the blood) agents.

Boron deficiency:

When there is insufficient boron in the parathyroids to keep them in check, they become overactive and release too my parathyroid hormone (PTH). This in turn raises the blood level of calcium by removing it from bones and teeth. This leads to osteoarthritis, osteoporosis and tooth decay.

High levels of calcium lead to calcification of soft tissues including: endocrine glands (especially the pineal gland and ovaries); arteries (arteriosclerosis), kidney stones (which can lead to hardening of the kidneys and kidney failure).

  • Deficiency of both magnesium and boron is especially damaging to bones and teeth.
  • Involuntary muscle contractions and stiffness.
  • Increased risk of cancer, as boron deficiency impacts cell signaling across the cell membranes, which may be an important cause for initiation of tumor growth

Borax as a supplement

The best way to do this is to make up a batch of concentrate, which is then taken by adding the recommended dose to a glass of water or juice, and taken with a meal. Or it can be added to a full-meal smoothie (what I do).

How to make the concentrate

Dissolve borax powder in filtered or distilled water (free of chlorine and fluoride) to make up a batch of concentrate, and store in a clean glass jar out of reach of small children:

  • 1 lightly rounded teaspoonful (5 – 6 grams) of borax
  • 1 liter of water (4.22 cups, just shy of 4¼ cups; since the amount of borax is not very exact, you could certainly use a quart of water)
  • NOTE: I use a 22 oz jar, so mix 3.5 – 4 g borax in 22 oz water.


Standard dose: This is for people without mineral deficiency symptoms, and provides about 3 mg boron per dose.

  • Add 1 tsp (5 ml) of concentrate added to a glass of water, juice, or smoothie, and best taken with a meal (a smoothie can be a meal in itself). This contains 25 – 30 mg of borax, which provides about 3 mg boron. Take 1 dose per day to start.
  • If that single dose feels right after a week or so, then take a second dose with another meal. This can be taken indefinitely.
  • Cat’s note: I started this 7/20/12 at level of 1 tsp concentrate per day (in my morning smoothie). Increased to 2 tsp per day 7/24/12. Decreased to ½ in 2016.

Increased dose: This is for those with arthritis, osteoporosis, or menopause (and other low sex-hormone issues), or calcium-magnesium balance issues:

  • 1 tsp (5 ml) of concentrate with a meal (can dilute in water or juice) three times a day. But start out at dose of once a day and gradually increase.
  • [NOTE: see toxicity, below for the safe upper limits for boron consumption.]

High dose: This is for candida treatment or removing fluoride from the body (per Earth Clinic on borax cures and Fluoride Poisoning). The dose is dependent on body weight (compared to normal for your height and body build). Always start out with the standard dose (above) and gradually increase to the appropriate high dose.

Warning: These are high doses, so take with caution and under supervision of your qualified healthcare practitioner. The National Institute of Health (NIH) has established the safe upper limit (UL) for boron intake by adults to be 20 mg/day. These ‘high doses’ exceed that limit. These doses are not appropriate for infants and children

NOTE: The higher doses are fairly alkaline and may taste soapy. You can neutralize this (to diminish the soapy taste) with lemon juice, vinegar or ascorbic acid (vitamin C) powder.

  • Low to normal weight: 100 ml of concentrate (6 Tbsp plus 2 tsp), diluted in water or juice, spaced out during day. Alternately, measure ⅛ tsp of borax powder and dissolve in 2 quarts clean water to drink throughout the day. This provides about 60 mg boron. Keep this out of reach of small children.
  • Heavier individuals: 200 ml (13 Tbsp plus 1 tsp) of concentrate, diluted in water or juice, spaced out during day. Alternately measure ¼ tsp of borax powder and dissolve in 2 quarts clean water to drink throughout the day. This provides about 120 mg boron Keep this out of reach of small children

Where you live makes a big difference in your boron consumption from foods/water. Eating root-veggies grown in boron-rich soil has greater impact on reducing joint pain, than those grown in boron-deficient soils, and also than the part of plants above ground. This is illustrated in the following table (2); NOTE: I reorganized the list from low to high boron consumption in this table.

Compare Boron Levels for Joint Pain


For example, compare the following examples, which illustrate a big difference in incidence of joint pain:

  • Fijian Indians who have a diet high in rice, vs Native Fijians whose diet is high in root veggies), with
  • Xhoas who live in big cities (and eat a diet low in boron), vs Xhoas tribal people (who eat a traditional diet higher in boron)

Cautionary notes

Alternatives to borax/boric acid (where not available)

In most countries, borax and boric acid are listed as a reproductive poison, so may not be available.

Boron tablets (chelated boron, not borax) are usually allowed and provide 3 mg elemental boron per tablet. Because this is not ionic boron (not a salt), it is much less effective, especially against candida and certain pathogens such as mycoplasma, nor as a quick cure for arthritis, osteoporosis, or hormone balancing.

For maximum effectiveness, Walter recommends 3 or more boron tablets, spaced out throughout the day for an extended period, combined with sufficient magnesium (Mag Chloride is his recommendation and mine), and a suitable antimicrobial program.

Side effects:

The following side effects are signs of healing, and are necessary if you want to improve your health.

  • Muscle relaxation: It is known that high cellular calcium levels cause muscle contraction with cramps or spasms, a common cause of pain. Boron (from borax), especially with magnesium, relaxes muscles by assisting the pumping of calcium from the cells to the extracellular fluid. This is generally seen as a positive side effect.
  • Herxheimer reaction: When taken at the recommended dosages above, this is the most common side effect, from candida die-off. This reaction indicates a healing reaction with beneficial long-term effects. The Herxheimer reaction is felt mainly as flu-like symptoms (tired & achy muscles, fatigue, headache, nausea). See The Healing Crisis, or Herxheimer Reaction (3) for lots of good info. If you experience this reaction, lower your dose, then slowly build back up. Or take a break for a few days, then start again at a lower dose before building back up.
  • Temporary pain: In cases of longstanding and severe calcifications, temporary pain in the area of the calcifications (typically hips and shoulders) or in the kidneys, or numbness/reduced sensitivity in hands and feet. This is because the release of calcium into the immediate area or the blood happens more quickly than the body can redistribute the calcium to the bones where it belongs, or to excrete it. Note that these problems are temporary healing reactions that cannot be avoided if you want a higher level of health.

What to do if you have a side effect:

Please know that side effects mentioned above are signs of healing, and are necessary if you want to improve your health.  You can minimize the negative effect by:

  • increasing fluid intake
  • use more organic acids such as lemon juice, ascorbic acid, or vinegar
  • improve lymph flow by rebounding, walking or inverted positions. A small personal trampoline is great for this.

If the discomfort is too great for you despite the above recommendations, temporarily stop the treatment until the problem subsides, then reintroduce at a lower dose and slowly increase with time.

Toxicity: Are Borax, Boric Acid and Boron safe for ingestion?

The National Institute of Health (NIH) (4a) provides the following information on the safe upper limit (UL) for boron intake:

  • Adults, and pregnant or breast-feeding women over 19 years of age: 20 mg/day
  • Adolescents, and pregnant or breast-feeding women 14 – 18 years of age: 17 mg/day
  • Children 9 – 13 years old: 11 mg/day
  • Children 4 – 8 years old: 6 mg/day
  • Children 1 – 3 years old: 3 mg/day
  • Infants: no UL has been established

Dosages that exceed these ULs could be toxic. Infants should not be treated with any form of boron except under the care of a qualified medical professional.

Boron Citrate and other Chelates

As a supplement, boron is usually chelated by citrate, aspartate and/or glycinate. It is currently not listed as toxic or poisonous, so is not a consideration in this debate. However it should be noted that chelated boron is not as effective as borax/boric acid in treating problems like arthritis, osteoporoses, and sex hormone deficiencies, because it first has to be removed from the chelate structure (chelate means “claw”), which is difficult.

Boric Acid

The National Institute of Health (NIH) (4b) believes boric acid to be quite toxic. However, the instances cited involve large or repeated doses over an extended period of time. Most other sources indicate it is no more toxic than salt.

Other reliable sites such as BeyondPesticides (5) indicate that boric acid is no more toxic for humans than salt or baking soda. Boric acid is toxic to certain insects (like ants), but for larger animals like birds and humans, it is toxic only when given in large doses (similar to salt or baking soda). It is far more safe as a pesticide than synthetic pesticides. They do, however, caution to keep it out of reach of children.

In the stomach, the alkaline borax reacts with the acidic hydrochloric acid secreted by the stomach, to form boric acid (a weak acid) and sodium chloride (salt). Therefore I believe one can assume the degree of toxicity would be the same for boric acid as it is for borax.

CAT”s NOTE: when taking boric acid supplementally instead of borax, the dosage must be adjusted (because the molecular weight of boric acid is much less than that of borax).


If you read the borax box, you will see warnings such as these; are they all valid?

  • Avoid contact with eyes;
  • Do not take internally’;
  • Keep out of reach of children;
  • Not for drug use.

If you look up borax toxicity or borax poison on the internet, you will find lots of warnings. Are they serious? Should you heed them? Here are some facts (and rebuttals, in blue) from Getting to the bottom of Borax – Is it safe or not? (2)

  • The FDA banned borax as a food additive, and the European Chemicals Agency added it to their “list of substances of very high concern” a few years ago. This has to do with an ongoing debate as to whether excess boron in soil harms crops, and not so much about human ingestion at reasonable doses.
  • Borax is classified as non-carcinogenic, and a mild skin irritant. On the other hand, several studies in the ToxNet database show borax is only a very mild lung irritant and causes no lasting damage. Additionally, it does not penetrate the skin well (3), and is not considered to be bio-accumulative (repetitive dosing doesn’t build up in your system)
  • It has potential to disrupt the reproductive system, according to studies on mice. The mice in the study were given very high doses of ingested borax. Nevertheless this is why it should not be given to infants and very young children, who would be most at risk from such damage at even moderate dosage.
  • Like salt, baking soda and water, it is acutely toxic at extremely high doses. Ingesting moderate quantities may lead to gastrointestinal upset and nausea. The toxicity problems were observed in the mice only at very high dosages. It is risky to extrapolate from the effect on non-primate animals to humans. The Material Safety Data Sheet (4)(MSDS) lists borax with a health hazard level of ‘1’, the same as baking soda and salt.

Walter Last believes the demonization of borax is an attempt by the pharmaceutical industry to discredit an effective and inexpensive competitor to their expensive synthetic pharmaceuticals.

I do believe that one should use caution when treating children with borax (or boric acid); it should not be given to infants at all. But adults only have to be concerned if they are given megadoses – the same kind of doses that would make table salt and other common foods toxic/poisonous.  The key is moderation.

On the other hand, the benefits of treating boron-deficient humans with borax are tremendous.

I am not a doctor and am not qualified to advise you on your specific health situation.


For Introduction:

  1. Image from Amazon: 51pQyyjdreL.jpg
  2. Chart from Lee Euler (Awakening from Alzheimers); he did not provide his source.
  3. Herxheier’s Reaction The Healing Crisis:
  4. National Institute of Health (NIH)
    1. on boric acid dosage:
    2. on boric acid toxicity:
  5. Beyond Pesticides on toxicity of boric acid, borates and borax:
  6. Walter Last’s article:

Walter Last’s References from his original article on Boron

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