Boron is a trace mineral found in a variety of plant foods, particularly fruits, nuts, and legumes, that has been studied for its potential roles in bone health, hormone regulation, and cognitive function. According to the National Institutes of Health Office of Dietary Supplements, boron is not currently classified as an essential nutrient with a formally established Recommended Dietary Allowance, though typical dietary intake for adults eating a varied diet is generally estimated at 1 to 3 milligrams per day.
Because boron intake tracks closely with fruit, nut, and legume consumption, a diet that regularly includes these food groups tends to provide a fairly consistent supply. Boron concentration in food also varies with the boron content of the soil a crop was grown in, which is one reason researchers describe average intake as a broad estimate rather than a precise figure. The foods below, ranked by their typical contribution to dietary boron, offer a practical starting point for anyone looking to include more of this trace mineral in their diet.
According to the National Institutes of Health, boron has also been studied for its potential involvement in bone metabolism and steroid hormone metabolism, including estrogen and testosterone, and some preliminary research has explored its possible relevance to cognitive function and psychomotor skills. This research remains in relatively early stages compared to more established nutrients, and much of what is currently understood comes from a mix of animal studies, laboratory research, and a smaller body of human clinical research.
Boron and Bone and Hormone Health
One of the more studied areas involving boron relates to its potential supportive role in bone metabolism. According to the National Institutes of Health, boron appears to influence how the body handles calcium and magnesium, two minerals central to bone structure, and some research has also examined boron’s relationship to estrogen and testosterone levels. This research remains less extensive than the evidence supporting established bone-health nutrients like calcium and vitamin D, so boron is best considered a potentially complementary factor rather than a primary nutrient for either bone or hormone health at this stage of the science.
1. Prunes
Among the richest common dietary sources of boron.
Best eaten: As a snack, stewed, or added to oatmeal.
| Nutrient | Amount per 1/2 cup | Source |
|---|---|---|
| Boron | 1 to 2 mg | NIH ODS |
| Fiber | 6 g | USDA FoodData Central |
2. Raisins
A convenient, portable source of boron.
Best eaten: As a snack, or mixed into oatmeal and trail mix.
| Nutrient | Amount per 1/2 cup | Source |
|---|---|---|
| Boron | 1 to 1.5 mg | NIH ODS |
| Iron | 1.5 mg | USDA FoodData Central |
3. Avocados
A nutrient-dense fruit source of boron.
Best eaten: Sliced, mashed into guacamole, or added to toast.
| Nutrient | Amount per 1 medium | Source |
|---|---|---|
| Boron | Approximately 1 mg | NIH ODS |
| Fiber | 10 g | USDA FoodData Central |
4. Almonds
A meaningful nut-based source of boron.
Best eaten: As a snack, or blended into almond butter.
| Nutrient | Amount per 1 oz | Source |
|---|---|---|
| Boron | Approximately 0.5 mg | NIH ODS |
| Vitamin E | 7.3 mg | USDA FoodData Central |
5. Peanuts
A widely available legume source of boron.
Best eaten: As a snack, or in peanut sauce and trail mix.
| Nutrient | Amount per 1 oz | Source |
|---|---|---|
| Boron | Approximately 0.5 mg | NIH ODS |
| Protein | 7 g | USDA FoodData Central |
6. Peanut Butter
A concentrated, convenient way to add boron to meals.
Best eaten: On toast, in smoothies, or with apple slices.
| Nutrient | Amount per 2 tbsp | Source |
|---|---|---|
| Boron | Approximately 0.5 mg | NIH ODS |
| Protein | 8 g | USDA FoodData Central |
7. Dried Apricots
A dried fruit contributing meaningfully to boron intake.
Best eaten: As a snack, or chopped into oatmeal and salads.
| Nutrient | Amount per 1/4 cup | Source |
|---|---|---|
| Boron | Approximately 0.5 mg | NIH ODS |
| Vitamin A | 755 IU | USDA FoodData Central |
8. Chickpeas
A legume that adds boron alongside fiber and plant protein.
Best eaten: Roasted, in hummus, or added to salads and grain bowls.
| Nutrient | Amount per 1/2 cup, cooked | Source |
|---|---|---|
| Boron | Trace to 0.3 mg | NIH ODS |
| Fiber | 6 g | USDA FoodData Central |
Boron Toxicity Considerations
Dietary boron from food is generally considered safe. According to the National Institutes of Health, the Tolerable Upper Intake Level for boron is estimated at around 20 milligrams per day for adults, a level far above what is typically obtained through diet alone. Concentrated boron supplements should be used only with guidance from a healthcare provider, given the still-developing research on optimal intake levels.
Quick Reference: All 8 Boron Sources at a Glance
| Food | Boron per Serving |
|---|---|
| Prunes | 1 to 2 mg per 1/2 cup |
| Raisins | 1 to 1.5 mg per 1/2 cup |
| Avocados | Approximately 1 mg per medium fruit |
| Almonds | Approximately 0.5 mg per 1 oz |
| Peanuts | Approximately 0.5 mg per 1 oz |
| Peanut butter | Approximately 0.5 mg per 2 tbsp |
| Dried apricots | Approximately 0.5 mg per 1/4 cup |
| Chickpeas | Trace to 0.3 mg per 1/2 cup |
5 Evidence-Based Tips for Getting Adequate Boron
- Include dried fruits regularly. Prunes, raisins, and dried apricots are among the richest common dietary sources of boron.
- Add avocado to meals. Avocados provide meaningful boron alongside healthy fats and fiber.
- Snack on nuts and legumes. Almonds, peanuts, and chickpeas contribute steadily to overall boron intake.
- Eat a varied plant-based diet. Since boron is spread across many fruits, nuts, and legumes, dietary variety naturally supports adequate intake.
- Avoid high-dose supplements without guidance. Whole food sources remain the more well-supported approach for most people.
Who Might Be Interested in Boron Rich Foods
People interested in bone health, alongside more established nutrients like calcium and vitamin D, may find boron an interesting complementary piece worth learning more about. Those curious about boron and hormone regulation should approach the research with realistic expectations given the still-developing evidence base. Anyone who already enjoys dried fruits, avocados, nuts, and legumes as regular parts of their diet can feel confident these foods are also contributing to their boron intake. Athletes and older adults focused on bone density as part of a broader healthy aging strategy may also want to pay attention to boron-containing foods, given the ongoing research into its potential relationship with mineral metabolism.
The Bottom Line
Boron is a trace mineral found across dried fruits, avocados, nuts, and legumes, studied for its potential roles in bone health, hormone regulation, and cognitive function, though it has not been established as a formally essential nutrient. Prunes and raisins stand out as some of the most concentrated common dietary sources identified in research so far. Regularly eating a variety of these foods is a reasonable, well-rounded way to support boron intake while gaining other established nutritional benefits, including fiber, potassium, and healthy fats. As research into boron’s specific health roles continues to develop, staying informed through reputable sources and discussing any supplement considerations with a healthcare provider remains the most sensible path forward.
This article is for informational purposes only and is not intended as medical advice. Nutrient values are approximate and sourced from USDA FoodData Central and the National Institutes of Health Office of Dietary Supplements. Consult a healthcare provider or registered dietitian before making significant changes to your diet or starting any new supplement.
