Lithium shows up naturally in a wide range of everyday foods and in most drinking water, though the amounts vary enormously depending on the soil, the geology of local aquifers, and what you eat. Leafy vegetables, legumes, eggs, dairy, and certain mineral waters tend to be the richest natural sources. A growing body of ecological research links even these trace amounts to lower rates of suicide, dementia, and overall mortality, which is why interest in dietary lithium has quietly grown over the past two decades. Getting more of it from food and water is straightforward once you know where it concentrates and what drains it away.
Which Foods Contain the Most Lithium
Lithium is taken up from the soil by plants and passed along to animals that eat them, so virtually every food contains at least a trace. But concentrations are not spread evenly. A Romanian market study that measured lithium across a broad range of food categories found that leafy vegetables ranked highest, followed by bulbous vegetables (like onions and garlic), then fruits, legumes, egg whites, root vegetables, dairy products, egg yolks, and finally meats at the bottom of the list.1PubMed Central. Lithium Content and Its Nutritional Beneficence, Dietary Intake, and Impact on Human Health in Edibles from the Romanian Market The pattern makes intuitive sense: plants growing in mineral-rich soil absorb lithium directly through their roots, while animals eating those plants accumulate less of it in their tissues. Greens like spinach, lettuce, and cabbage sit at the top. Grains and legumes also contribute meaningfully, especially when grown in lithium-rich soils.
Among animal products, eggs and dairy tend to carry more lithium than meat. Milk products in one European analysis ranged from about 0.01 to 0.50 mg per kilogram, while smoked fish averaged slightly higher at about 0.11 mg/kg.2Food / Nahrung. Content of strontium, lithium and calcium in selected milk products and in some marine smoked fish These are small numbers, but they add up across a full day’s eating. The broad takeaway is simple: a diet heavy in vegetables, grains, and legumes will deliver more dietary lithium than one centered on meat.
Beverages and Their Lithium Content
What you drink matters too. A German study that measured lithium in 160 different beverages found that mineral water was far and away the richest source, with an average lithium concentration around 108 micrograms per liter. Wine and beer came in around 10 µg/L on average, and soft drinks were in a similar range. Tea and coffee infusions contained even less.3PubMed Central. Lithium Content of 160 Beverages and Its Impact on Lithium Status in Drosophila melanogaster The same Romanian food study also looked at drinks and found that red wine, white wine, beer, and fruit juice had higher mean lithium concentrations than ciders or commercial bottled waters.1PubMed Central. Lithium Content and Its Nutritional Beneficence, Dietary Intake, and Impact on Human Health in Edibles from the Romanian Market
This does not mean wine is a health strategy. But if you already enjoy a glass, it is worth knowing that it contributes a small amount of lithium alongside its other mineral content. Fruit juices made from produce grown in mineral-rich soil can carry a noticeable trace as well.
Drinking Water Varies Wildly by Location
Your tap water might be a significant source of lithium or almost none at all, depending on where you live. A nationwide study of U.S. groundwater found that lithium concentrations in public water supply wells ranged from below 1 µg/L all the way up to 396 µg/L, with a median of about 8 µg/L. Domestic wells showed an even wider spread, reaching up to 1,700 µg/L in some locations.4PubMed. Lithium in groundwater used for drinking-water supply in the United States That is a staggering range. Two people living a few hundred miles apart could be drinking water with lithium concentrations that differ by a factor of a hundred or more.
Geography and geology explain most of this variation. Arid regions with older groundwater tend to have more lithium, because the water has been in contact with lithium-bearing rocks for longer. The High Plains aquifer stretching across the central U.S. had a median lithium level of about 25 µg/L in public supply wells, with nearly a quarter of wells exceeding a conservative drinking-water-only threshold of 60 µg/L. Meanwhile, the Biscayne aquifer in southern Florida topped out at just 2.6 µg/L, and no wells there exceeded either health benchmark.4PubMed. Lithium in groundwater used for drinking-water supply in the United States Unconsolidated sedimentary aquifers and sandstone formations are generally the richest in lithium, while carbonate-rock aquifers tend to be the poorest.5Environmental Science & Technology. Estimating Lithium Concentrations in Groundwater Used as Drinking Water for the Conterminous United States
Unless your local water utility publishes lithium data (most do not), you will not know exactly how much is in your tap water without testing it. But as a rough guide, if you live in the arid western U.S. or the Great Plains, your water probably contains more than if you live in the Southeast or areas with limestone bedrock.
Mineral Water as a Practical Concentrated Source
If your tap water is low in lithium, mineral water can fill the gap. Not all mineral waters are equal, though. A Hungarian study that tested bottled mineral waters found concentrations ranging from about 4 µg/L to 209 µg/L, with a median of only about 18 µg/L. The researchers grouped them into low (5–10 µg/L), medium (10–100 µg/L), and relatively high (100–200 µg/L) categories.6Scientific Reports. Lithium concentration in tap water, bottled mineral water, and Danube River water in Hungary A study of Portuguese mineral waters found an even more dramatic split: one cluster of brands had low concentrations up to about 11 µg/L, while a second cluster exceeded 100 µg/L. The highest concentrations, above 1,500 µg/L, appeared in heavily mineralized sodium-bicarbonate type waters that were naturally carbonated.7PubMed Central. Lithium in Portuguese Bottled Natural Mineral Waters-Potential for Health Benefits?
The practical lesson: if you are interested in getting more trace lithium from water, look for highly mineralized mineral waters, especially those from volcanic or geothermally active regions. Some European brands from Portugal, Germany, and central Europe are particularly rich. The lithium content is sometimes listed on the label alongside other minerals, but not always. If it is not on the label, checking the brand’s published water analysis (often available on their website) is worth the effort.
Why Anyone Cares About Trace Lithium
Lithium at pharmaceutical doses has been used for decades to treat bipolar disorder, but the research getting attention now focuses on the much lower amounts found naturally in water and food. Several ecological studies have found that communities whose tap water contains more lithium tend to have lower suicide rates. A meta-analysis pooling data from multiple countries found a consistent inverse association between lithium levels in public drinking water and overall suicide mortality.8PubMed. Association between naturally occurring lithium in drinking water and suicide rates: systematic review and meta-analysis of ecological studies An earlier study of 99 Austrian districts reported a similar negative association that held up even after adjusting for socioeconomic factors.9The British Journal of Psychiatry. Lithium in drinking water and suicide mortality
The effect is not always uniform across sexes. A Japanese study of 40 municipalities found a statistically significant negative association between tap water lithium and suicide rates in women, but not in men.10PubMed Central. Lithium in Tap Water and Suicide Mortality in Japan These are all ecological studies, meaning they compare populations rather than tracking individual exposure, so they cannot prove that lithium in water is directly responsible. But the consistency of the finding across different countries and research groups is hard to dismiss entirely.
Dementia and Cognitive Protection
Trace lithium’s potential reach extends beyond mood. A large Danish study using nationwide health data found a nonlinear relationship between lithium in drinking water and dementia incidence. People exposed to more than 15 µg/L had a roughly 17% lower rate of dementia compared to those in the lowest exposure band (2 to 5 µg/L). Intriguingly, people in an intermediate range of 5 to 10 µg/L actually had a higher incidence, suggesting the relationship is not a simple dose-response curve.11PubMed Central. Association of Lithium in Drinking Water With the Incidence of Dementia A systematic review of five available studies confirmed that associations between trace lithium and lower dementia risk or mortality appeared at concentrations as low as about 2 µg/L, though below that level the effect vanished.12PubMed Central. Trace lithium levels in drinking water and risk of dementia: a systematic review
Not every study points in the same direction. A UK cohort study found that lithium in drinking water was associated with a slightly increased dementia risk in women, while no relationship showed up in men.13PubMed. Low-level lithium in drinking water and subsequent risk of dementia: Cohort study The lithium concentrations in that study were quite low, mostly below 2 µg/L, which may explain the discrepancy with studies from areas where water lithium was higher. Animal research supports the idea that lithium at very low doses can influence brain biology: one study in a mouse model of Alzheimer’s disease found that chronic microdose lithium treatment affected neurotrophic factor levels in the cortex.14PLOS ONE. Chronic Microdose Lithium Treatment Prevented Memory Loss and Neurohistopathological Changes in a Transgenic Mouse Model of Alzheimer’s Disease A recent review highlights that even subtherapeutic lithium concentrations can modulate the enzyme GSK-3β, reduce abnormal tau protein phosphorylation, and boost neurotrophic and anti-inflammatory responses.15PubMed Central. Lithium and neuroprotection: a review of molecular targets and biological effects at subtherapeutic concentrations in preclinical models of Alzheimer’s disease
Longevity and Overall Mortality
Some of the most provocative findings involve lithium and lifespan. A study analyzing mortality data for over 1.2 million people in Japan’s Oita prefecture found that tap water lithium levels were inversely associated with overall mortality rates, even after adjusting for gender, age, and suicide deaths.16PubMed Central. Low-dose lithium uptake promotes longevity in humans and metazoans A study of Texas counties reported a similar pattern: higher lithium in tap water correlated with lower all-cause mortality and fewer years of potential life lost.17PubMed. Trace lithium in Texas tap water is negatively associated with all-cause mortality and premature death UK Biobank research has also noted repeated positive correlations between nutritional lithium intake from drinking water and longevity.18PubMed Central. Lithium treatment extends human lifespan: findings from the UK Biobank
These correlations are tantalizing but come with major caveats. Water lithium levels track with many other geological and socioeconomic variables. Areas with different water chemistry also have different soil minerals, different agricultural practices, and often different population demographics. Nobody has run a randomized controlled trial giving one town lithium-spiked water and another a placebo, so the causal chain remains unproven in humans. Still, the convergence of Japanese, American, and European data pointing in the same direction keeps the hypothesis alive.
How Much Lithium People Typically Consume
Estimates of daily dietary lithium intake cluster somewhere between a few micrograms and a few hundred micrograms, depending on the person’s diet and local water supply. One study of kidney transplant recipients, for instance, found a median dietary lithium intake of about 21 µg per day.19Nephrology Dialysis Transplantation. Dietary lithium intake, graft failure and mortality in kidney transplant recipients Some researchers have proposed that a provisional recommended intake should be about 1,000 µg per day for a 70-kg adult, though this figure is not officially recognized by any major regulatory body.20PubMed. Lithium: occurrence, dietary intakes, nutritional essentiality That gap between typical intake and suggested intake is enormous, and it hints at how little consensus exists on how much people actually need, or whether they “need” dietary lithium at all.
The Romanian market study found that for more than 99% of the food samples analyzed, the estimated daily lithium intake from those foods fell well below a provisional reference dose of 2 µg per kilogram of body weight per day, which is the threshold set for potential adverse effects on organs.1PubMed Central. Lithium Content and Its Nutritional Beneficence, Dietary Intake, and Impact on Human Health in Edibles from the Romanian Market In practical terms, it is extremely difficult to get anywhere near a harmful amount of lithium from food alone. The amounts in food are orders of magnitude below what is used in psychiatric treatment.
Is Lithium Actually an Essential Nutrient?
This is a genuinely unsettled question in nutrition science. Some researchers have argued that the evidence is strong enough to classify lithium as an essential trace element. Animal studies from the 1970s through the 1990s found that rats and goats kept on very low-lithium diets showed higher death rates and reproductive and behavioral abnormalities.20PubMed. Lithium: occurrence, dietary intakes, nutritional essentiality Based on this and related evidence, some authors have proposed a provisional recommended daily intake of 1,000 µg. Others remain cautious. A 2015 review noted that while the ecological studies linking trace lithium to better health outcomes are suggestive, they do not provide conclusive proof that lithium is a required nutrient for humans.21PubMed Central. Is lithium potentially a trace element?
The gap matters practically. Without official recognition as a nutrient, there is no regulatory framework pushing water utilities or food producers to monitor or maintain lithium levels. It also means you will not find lithium on a nutrition label. The conversation has been stuck in a “promising but inconclusive” holding pattern for years, in part because the funding incentive to study a naturally occurring, unpatentable mineral is low.
Cooking and Processing Can Strip Lithium Away
How you prepare your food affects how much lithium you actually absorb. A study on button mushrooms that had been grown in lithium-enriched substrate found that blanching fresh mushrooms caused about a 40% loss of their lithium content. When blanching was followed by pickling, losses jumped to 77–87%. The vinegar used in pickling appeared to amplify the loss through its chelating and acidifying effects.22Food Chemistry Advances. The effects of culinary processing on lithium from lithiated and reference button mushrooms (Agaricus bisporus) Non-lithium-enriched mushrooms showed similar proportional losses, in the range of 47–72% for combined blanching and pickling.
The implication extends beyond mushrooms. Boiling and draining any vegetable in a large volume of water will leach water-soluble minerals, lithium included. If maximizing trace mineral intake matters to you, steaming, roasting, or using cooking water in soups and sauces will preserve more of what was originally in the food. Raw or lightly prepared vegetables retain the most.
Dietary Lithium Versus Pharmaceutical Doses
One of the most important things to understand about natural lithium intake is how far removed it is from clinical use. Patients with bipolar disorder typically take around 1,000 mg of lithium per day. A median dietary intake of about 21 µg per day is more than 40,000 times lower.19Nephrology Dialysis Transplantation. Dietary lithium intake, graft failure and mortality in kidney transplant recipients At pharmaceutical doses, lithium can damage the kidneys and thyroid over time and requires regular blood monitoring. At dietary trace levels, no such risks have been documented, and there is even animal evidence suggesting that low lithium exposure may protect kidneys from certain types of damage.
This dose gap is why alarm about “lithium in your water” is generally misplaced. The concentrations that show up in drinking water and food are thousands of times below the threshold where toxicity has been observed. Even the most lithium-rich groundwater in the U.S. delivers a daily dose that is a small fraction of a psychiatric prescription.
Lithium Orotate Supplements
If you have browsed supplement shelves, you may have noticed lithium orotate capsules. This is a salt of lithium and orotic acid that has been marketed for decades as a supplemental lithium source. It typically provides around 5 to 20 mg of elemental lithium per dose, which places it well above dietary trace intake but far below psychiatric lithium doses.23PubMed. A toxicological evaluation of lithium orotate Few adverse events have been formally recorded with lithium orotate, but it also has not been subjected to the same rigorous clinical trials as prescription lithium carbonate. In the U.S. it is sold as a dietary supplement, not a regulated medication, which means quality and dosing consistency can vary between brands.
For people whose diets and water are naturally very low in lithium and who want to increase their intake beyond what food and mineral water provide, lithium orotate occupies a middle ground. It is not a substitute for psychiatric treatment, and anyone already on mood-stabilizing medication should talk to their prescriber before adding it. But as a source of trace to low-dose lithium, it is the most accessible concentrated option outside of high-lithium mineral water.
What Happens to Lithium in the Environment
Understanding where lithium accumulates in nature helps explain why certain foods are richer in it. A recent study of forest floor food webs found that decomposing leaf litter retained five to ten times more lithium than fresh leaves, meaning the soil and humus layer act as a lithium sink.24Scientific Reports. Biodiminution of lithium in forest floor food webs Earthworms, which feed directly on decaying organic matter, had the highest lithium levels among invertebrates studied, with concentrations around 5,000 nanograms per gram of dry weight. Higher up the food chain, lithium concentrations dropped rather than accumulated, a pattern the researchers called “biodiminution.” Moths and butterflies, for instance, had lithium levels below 400 ng/g.
This is essentially the opposite of what happens with mercury or certain persistent pollutants, which concentrate as you move up the food chain. With lithium, the bottom of the food web absorbs the most, and higher trophic levels shed it. For human diets, this pattern explains why plant foods grown in mineral-rich soil are the best natural source: they are closest to the soil where lithium concentrates, and the element does not build up further in the animals that eat those plants.