What Does Boron Do for the Body?

Reviewed on 2/11/2021

What does boron do for the body?

Boron is a trace mineral that affects hormone and enzyme metabolism, immune function, bone formation,  brain function and other systems in the body.

Boron is a trace mineral found in many foods and in the environment. It is also available as a dietary supplement. It is called an ultra-trace mineral, which means it is required in very minute quantities in the diet.

Boron doesn’t come under the category of essential nutrients for humans because there isn’t any clear evidence regarding the biological function of boron. However, it does have some beneficial effects on body functions such as it

Taking oral boron supplements by mouth prevents boron deficiency.

There is insufficient evidence to prove that boron is beneficial in the following conditions

  • Osteoarthritis: Few clinical studies in humans have suggested that boron is beneficial in reducing the symptoms of osteoarthritis. Boron manages osteoarthritis by possibly reducing inflammation. Additional studies are required to prove the same.
  • Osteoporosis: Some of the early research suggests that daily oral intake of boron doesn’t increase bone mass density in postpartum women.
  • Increasing testosterone levels in men

What are the chief food sources of boron?

The boron content in plant foods depends on the boron content of the soil and water where they are grown. Some of the food sources with their boron levels are as follows

Selected food sources of boron

FoodMilligrams (mg)
per serving
Prune juice, 1 cup1.43
Avocado, raw, cubed, 0.5 cup1.07
Raisins, 1.5 ounces0.95
Peaches, 1 medium0.80
Grape juice, 1 cup0.76
Apples, 1 medium0.66
Pears, 1 medium0.50
Peanuts, roasted, salted, 1 ounce0.48
Beans, refried, 0.5 cup0.48
Peanut butter, 2 tablespoons0.46
Apple juice, 1 cup0.45
Chili con carne, with beans, 1 cup0.41
Grapes, 0.5 cup0.37
Oranges, 1 medium0.37
Lima beans, dry, cooked, 0.5 cup0.35
Applesauce, 0.5 cup0.34
Fruit cocktail, canned, in a heavy syrup, 0.5 cup0.26
Broccoli, boiled, chopped, 0.5 cup0.20
Orange juice, 1 cup0.18
Spinach, boiled, 0.5 cup0.16
Banana, medium0.16
Spaghetti sauce, 0.5 cup0.16
Cantaloupe, cubed, 0.5 cup0.14
Carrots, raw, 1 medium0.14
Peas, green, cooked, 0.5 cup0.10
Milk, whole, 1 cup0.04

What is the maximum amount of boron you can take?

The maximum recommended amount of boron in each age group is as follows.

Tolerable upper intake levels (ULs) for boron

Birth to 6 monthNone established*None established*
7 to 12 monthsNone established*None established*
1 to 3 years3 mg3 mg
4 to 8 years6 mg6 mg
9 to 13 years11 mg11 mg
14 to 18 years17 mg17 mg17 mg17 mg
19+ years20 mg20 mg20 mg20 mg

*Breast milk, formula and food should be the only sources of boron for infants.

What are the health risks of taking excess boron?

There are no harmful effects of high boron intake from food and water. However, boron toxicity may be possible with the consumption of boric acid or borax. Boric acid or borax may be present in some household cleaning products and pesticides. Symptoms of boron toxicity include

Excessive doses of boron can be fatal, particularly at 15,000 to 20,000 mg of boron.



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