Lithium in Food and Water: Understanding Dietary Intake

Small amounts of lithium reach us through food and water, but the total varies by place and diet. There is no established daily requirement to aim for. Researchers are measuring these exposures more closely as interest grows in lithium's possible role in the brain.

How much lithium do people get each day?

Lithium occurs naturally in the diet, but it is not tracked on nutrition labels, has no established recommended intake, and is not measured for individuals. Any total is an estimate, and estimates disagree by an order of magnitude depending on method. The most commonly cited anchor is Schrauzer (2002), who reviewed dietary lithium and proposed a provisional intake near 1 mg/day while noting that no defined human deficiency disease exists (DOI). That figure was a review-level estimate, not a direct measurement.

A more rigorous, directly-measured figure comes from a 2026 study in Cuba that used a method called a Total Diet Study. In this method, researchers buy and prepare food the way people actually eat it, then test it directly for trace elements, instead of estimating from older data. This study tested 17 food groups "as consumed" across 450 adults in three regions and calculated a mean dietary lithium intake of 31.5 µg/day (Gonzalez and colleagues, 2026, Journal of Trace Elements in Medicine and Biology; DOI). Beverages, cereals, and tubers were the leading contributors. That total is roughly 30 times lower than Schrauzer's provisional figure. The gap shows how much these numbers depend on method: a direct measurement of one population is not necessarily representative of intake everywhere, and an older review-level estimate may not reflect what direct measurement finds. Neither number should be read as "the" human intake of lithium.

Because both food and water lithium depend on local geology, intake differs from place to place and from person to person. There is no authoritative per-person figure, and the numbers seen in popular sources are estimates rather than measured values.

Which foods contain the most lithium?

Lithium in food largely reflects the soil that plants grow in, so concentrations vary by region and are not standardized. A 2024 analysis of 1,071 food and beverage samples from the Romanian market measured lithium directly across food categories and reported a decreasing mean concentration in this order: leafy vegetables, bulbous vegetables, fruit, legumes, egg whites, root vegetables, milk products, egg yolks, meats (Iordache and colleagues, 2024, Foods; DOI). Among beverages, the same study found red wine, white wine, beer, and fruit juice higher in lithium, and cider and bottled water lower; tea and coffee showed narrow, modest amounts. This is one regional survey, not a universal food-composition table. Lithium content in the same food category can vary by where it was grown, which is why there is no standardized per-food database equivalent to those maintained for vitamins or labeled minerals.

Lithium in food versus water: which matters more?

Both contribute, and the balance depends on where someone lives and what they drink. In the Cuban Total Diet Study, beverages, cereals, and tubers were the leading contributors to lithium intake, ahead of other food groups (Gonzalez and colleagues, 2026; DOI). Both food and water lithium ultimately trace back to local geology. The same rock and soil chemistry that determines groundwater lithium concentrations also determines how much lithium crops take up (Lindsey and colleagues, 2021; DOI; Lombard and colleagues, 2024; DOI). In regions with mineral-rich groundwater, water can be a leading source; where water is treated or naturally low in lithium, food may dominate. Local water lithium varies enormously, which is covered in detail on the drinking water page.

Do processed or bottled drinks lower lithium intake?

Not reliably by category alone. A Romanian food-and-beverage survey found differences between sampled drinks, but it did not establish that bottled or processed drinks always lower lithium intake. Source water, ingredients, and treatment all matter. That comparison is not a reason to choose alcohol or a particular drink to obtain lithium.

Is dietary lithium intake safe?

Dietary assessments can describe exposure in the populations and food samples studied. A 2024 Romanian survey compared estimated intake from samples with a provisional reference dose. It cannot certify every food, water supply, or person’s intake as safe. Its findings also do not establish a reason to avoid ordinary vegetables or seek out high-lithium foods.

Separately, a New Zealand government dietary risk assessment covering ten population cohorts, including infants and children, evaluated lithium alongside nine other trace elements and identified no dietary risk from lithium exposure for any cohort (Pearson and Ashmore, 2019, Food Additives & Contaminants: Part A; DOI). Taken together, ordinary dietary lithium from food and water is not considered a safety concern by these assessments, distinct from the separate, much higher doses used in prescription lithium.

Is there a recommended lithium intake?

No official recommended intake exists. Lithium is not classified as an essential nutrient, and there is no established dietary target. Schrauzer (2002) argued more than two decades ago that trace lithium may be conditionally beneficial and proposed a provisional figure, but this was a single author's proposal, not an authority-recognized requirement (DOI).

The 2025 Nature study made lithium a more compelling research question by connecting lithium availability with Alzheimer’s-related changes in human tissue and mice. Water-exposure studies add observational evidence, but their results are mixed and non-linear. These findings do not establish that increasing dietary lithium helps people.

This research is still early. It comes mostly from mouse models and population-level observation, not human clinical trials proving benefit, and the 2026 randomized lithium carbonate trial in people did not meet its primary goals (our full lithium and dementia evidence review covers this in depth, including why the form of lithium used may matter). There's no target intake to hit. But it's one of the more promising open questions in brain-aging research right now, and it's a meaningful part of why we think trace dietary lithium is worth paying attention to rather than dismissing as irrelevant.

Limitations and safety

Food surveys use different methods and reflect local growing conditions. Their estimates should not be treated as a personal intake calculator. There is no established recommended intake, and a mouse experiment cannot tell us what a person should eat or supplement. For amounts and safety considerations, see the lithium forms guide.

Frequently asked questions

How much lithium do people get from food and water?

Estimates vary enormously by method: a 2002 review proposed a provisional intake near 1 mg/day, while a 2026 Total Diet Study directly measuring food in Cuba found a mean intake of 31.5 µg/day, roughly 30-fold lower. These are tiny amounts far below prescription doses either way, lithium is not a routinely measured nutrient, and any personal figure is an estimate that varies by region.

What foods are highest in lithium?

A 2024 measured survey of over 1,000 food and beverage samples from the Romanian market found leafy and bulbous vegetables highest, followed by fruit, legumes, egg whites, root vegetables, milk products, egg yolks, and meats, in decreasing order. Wine, beer, and fruit juice measured higher than cider and bottled water. Lithium content reflects local soil, so this ranking is a measured pattern from one region, not a universal guarantee.

Does coffee or beer contain lithium?

A 2024 measured survey found beer higher in lithium than cider or bottled water, while tea and coffee showed narrow, modest amounts. Any beverage made with lithium-containing water can carry trace lithium, so the amount depends heavily on the water used, not just the drink category.

Do bottled or processed drinks lower my lithium intake?

You cannot infer the amount from “bottled” or “processed” alone. Lithium depends on source water, ingredients, and processing. A regional survey cannot predict the lithium content of every brand or batch.

Is it safe to eat lithium-rich foods?

The cited food surveys and dietary assessments do not establish a universal safety guarantee. Choose a varied diet for its overall nutritional value; there is no established lithium intake target or demonstrated need to concentrate high-lithium foods.

Should I eat more lithium-rich foods for my brain?

There is no established lithium intake target or evidence that choosing foods specifically to raise lithium improves brain health. Enjoy vegetables, legumes, and whole grains for their well-established nutritional value. Follow the lithium research as it develops without treating a food survey as a personal dosing plan.

Related pages

• Lithium and the brain: the complete guide
• Lithium in drinking water
• Lithium orotate vs carbonate: forms, dosing, safety
• What the research actually says: the evidence

References

1. Aron, Ngian, Qiu et al. (2025). Lithium deficiency and the onset of Alzheimer’s disease. Nature.
2. Fraiha-Pegado, de Paula, Alotaibi et al. (2024). Trace lithium levels in drinking water and risk of dementia: a systematic review. International Journal of Bipolar Disorders.
3. González, Fernández-Guerrero, Muñoz-Fariña et al. (2026). Trace element composition and dietary exposure to Mn, Se, Mo, Cr, Co, Ni, and Li in the Cuban diet: Evidence from a Total Diet Study. Journal of Trace Elements in Medicine and Biology.
4. Iordache, Voica, Roba et al. (2024). Lithium Content and Its Nutritional Beneficence, Dietary Intake, and Impact on Human Health in Edibles from the Romanian Market. Foods.
5. Kessing, Gerds, Knudsen et al. (2017). Association of Lithium in Drinking Water With the Incidence of Dementia. JAMA Psychiatry.
6. Lindsey, Belitz, Cravotta et al. (2021). Lithium in groundwater used for drinking-water supply in the United States. Science of The Total Environment.
7. Lombard, Brown, Saftner et al. (2024). Estimating Lithium Concentrations in Groundwater Used as Drinking Water for the Conterminous United States. Environmental Science & Technology.
8. Pearson, Ashmore (2019). Risk assessment of antimony, barium, beryllium, boron, bromine, lithium, nickel, strontium, thallium and uranium concentrations in the New Zealand diet. Food Additives & Contaminants: Part A.
9. Schrauzer (2002). Lithium: Occurrence, Dietary Intakes, Nutritional Essentiality. Journal of the American College of Nutrition.