Lithium
Useful mainly for no supplement-dose use is well established; prescription lithium treats bipolar disorder under medical care.
Quick decision guide
May help most
no supplement-dose use is well established; prescription lithium treats bipolar disorder under medical care
Common dosing range
supplements 1–5 mg elemental lithium/day; prescription 150–300 mg (medical only)
When to expect effects
Weeks (prescription); unproven at supplement doses
Watch out for
narrow therapeutic window at higher doses; interacts with common drugs and is unsafe in pregnancy
What is it
Lithium is a trace alkali metal found in drinking water, grains, and certain vegetables in small amounts. While it is best known as a prescription medication for bipolar disorder at high doses, it is also marketed in much lower doses (e.g., lithium orotate) as a supplement for mood and cognitive support.
Is it worth it for you?
Use this as a quick fit check, not a diagnosis.
Worth considering if…
Probably skip if…
Evidence at a glance
| Goal | Effect | Best fit | Time |
|---|---|---|---|
bipolar disorder (prescription dosing only) Strong Evidence | Large for mood stabilization and relapse prevention | people with bipolar disorder under psychiatric care | Weeks |
suicide risk (population-level) Limited Evidence | Modest association | studied at population scale, not individuals | Not applicable |
cognitive decline and Alzheimer's prevention Limited Evidence | Uncertain | not established | Unknown |
cluster headache Limited Evidence | Variable | people with chronic cluster headache, under medical care | Weeks |
bipolar disorder (prescription dosing only)
- Effect
- Large for mood stabilization and relapse prevention
- Best fit
- people with bipolar disorder under psychiatric care
- Time
- Weeks
suicide risk (population-level)
- Effect
- Modest association
- Best fit
- studied at population scale, not individuals
- Time
- Not applicable
cognitive decline and Alzheimer's prevention
- Effect
- Uncertain
- Best fit
- not established
- Time
- Unknown
cluster headache
- Effect
- Variable
- Best fit
- people with chronic cluster headache, under medical care
- Time
- Weeks
Evidence for 4 uses
AI-assisted evidence assessment — talk to your doctor before relying on any single supplement.
bipolar disorder (prescription dosing only)
Disease adjunctPrescription lithium (150–300 mg elemental/day) is a first-line mood stabilizer with consistent RCT and meta-analytic evidence for preventing manic and depressive relapse in bipolar disorder. This applies only to prescription dosing with blood-level monitoring; over-the-counter low-dose lithium supplements do not deliver these doses and are not a treatment for bipolar disorder.
Bottom line: Lithium is a proven mood stabilizer, but only at prescription doses under medical supervision, not as an OTC supplement.
suicide risk (population-level)
Supplement benefitEcological studies repeatedly associate higher lithium levels in drinking water with lower regional suicide rates, and prescription lithium reduces suicide risk in mood disorders in trials. The drinking-water data are observational and cannot establish that low-dose supplements reduce an individual's suicide risk.
Bottom line: Population data and prescription trials suggest an anti-suicide signal, but this does not prove low-dose supplements help individuals.
Evidence is mixed
Prescription-dose trials support reduced suicidality, but the trace-lithium evidence is ecological and confounded, and a causal effect of supplemental microdoses is unproven.
cognitive decline and Alzheimer's prevention
Mechanism onlyLithium inhibits GSK-3 beta and supports BDNF, mechanisms relevant to neurodegeneration, and a few small studies of low-dose lithium report slowed cognitive decline. Evidence is preliminary, with small samples and mixed results, and far weaker than for its psychiatric uses.
Bottom line: A biologically plausible but unproven use; current low-dose evidence is too thin to recommend it.
Evidence is mixed
Small trials and biomarker studies hint at neuroprotection, but results are inconsistent and not confirmed in adequately powered trials.
cluster headache
Disease adjunctLithium has long been used off-label for cluster headache prophylaxis, supported mainly by older open-label series and small studies, typically at near-prescription doses with monitoring. Controlled evidence is limited and this is a clinician-directed use, not an OTC supplement application.
Bottom line: Lithium is sometimes used for cluster headache prevention, but only under medical supervision and on limited evidence.
How it works
How to take it
What to track
3 commercial forms
Compare the main delivery options and what they’re best suited for.
Lithium orotate
Most common supplement form. Claims of superior cellular uptake over lithium carbonate are not well-substantiated. Typically provides 1-5 mg elemental lithium per dose.
Popular OTC supplement form; bioavailability is debated.
Lithium aspartate
Less common alternative. Used at supplement doses, not therapeutic doses.
Similar to orotate; supplement-strength only.
Lithium carbonate (prescription)
Used for bipolar disorder and other psychiatric indications under physician supervision with blood monitoring.
Well-absorbed; the standard prescription form.
Safety
Know the common side effects, key cautions, and who should avoid it.
Common side effects
Serious risks
toxicity at prescription/high doses (tremor, confusion, kidney damage, thyroid dysfunction)
Who should avoid it
- pregnant or breastfeeding women
- people with kidney disease, thyroid disorders, or cardiac conduction problems
- those on interacting drugs without monitoring
- children and adolescents without specialist care
Pregnancy & breastfeeding
Avoid; prescription lithium has known teratogenic risk and supplemental lithium should not be used in pregnancy or lactation.
Interactions
reduce lithium clearance and can raise levels toward toxicity
can increase lithium levels
reduce lithium excretion
additive serotonergic and CNS effects
Documented interactions
Evidence-graded pair pages with sources, dosing notes, and timing guidance — a complement to the narrative section above.
Warnings (7)
+ ibuprofen
highIbuprofen and other NSAIDs inhibit renal prostaglandin synthesis, which reduces renal blood flow and the kidney's ability to clear lithium. This can raise serum lithium levels, and published case reports describe clinically significant lithium toxicity after an NSAID was started.
+ sodium
highLithium and sodium are handled by the same transporters in the kidney and compete for reabsorption. Eating much less sodium than usual causes the kidneys to hold on to both sodium and lithium, which can push lithium levels up toward toxicity; a sudden large increase in sodium can flush lithium out and drop it below the level needed to control mood. The amount of sodium matters less than keeping it steady.
+ ace inhibitors
highACE inhibitors lower the rate at which the kidneys clear lithium, so adding one to lithium therapy tends to raise serum lithium levels. Because lithium has a narrow safety margin, this can push levels toward the toxic range. A distinctive feature is delayed onset: toxicity may not appear for several weeks after the ACE inhibitor is started, especially in older adults and those with reduced kidney function.
+ alcohol
highLithium has a narrow therapeutic window and is cleared almost entirely by the kidneys. Alcohol promotes urination and dehydration, which can reduce renal lithium clearance and push serum lithium levels higher — toward the toxic range (tremor, confusion, unsteadiness, vomiting). Alcohol also independently destabilizes mood in bipolar disorder, and its early intoxication signs can mask the early warning signs of lithium toxicity.
Food sources
| Food | Amount | %DV |
|---|---|---|
| Tap water (varies by region) | Trace, 0-0.2 mg/L | — |
| Grains and cereals | Trace amounts | — |
| Vegetables (leafy greens, tomatoes) | Trace amounts | — |
| Mineral water (some brands) | Variable | — |
| Cured meats | Trace amounts | — |
Tap water (varies by region)
- Amount
- Trace, 0-0.2 mg/L
- %DV
- —
Grains and cereals
- Amount
- Trace amounts
- %DV
- —
Vegetables (leafy greens, tomatoes)
- Amount
- Trace amounts
- %DV
- —
Mineral water (some brands)
- Amount
- Variable
- %DV
- —
Cured meats
- Amount
- Trace amounts
- %DV
- —
Choosing a product
What to look for on the label — and what to be skeptical of.
Look for…
Be skeptical of…
Frequently asked questions
Is supplement-strength lithium the same as prescription lithium?⌄
No. Prescription lithium (typically 150-300 mg elemental per dose) treats bipolar disorder under medical supervision. Supplement lithium (1-5 mg) is far lower and not appropriate for treating psychiatric illness.
Do I need blood tests with lithium supplements?⌄
Not for typical low-dose supplements (under 5 mg). At higher supplement doses or in people taking interacting medications, periodic testing may be wise. Prescription doses require blood monitoring.
Can lithium help with anxiety or mood?⌄
Some users report benefits at supplement doses, but rigorous clinical evidence at these doses is limited. If you have significant mood symptoms, get evaluated by a clinician rather than self-treating.
Is lithium orotate safer than lithium carbonate?⌄
Lithium orotate at supplement doses is generally well-tolerated due to the low elemental lithium content. Carbonate at prescription doses has more side effects because the doses are far higher, not because the chemistry is more dangerous.
Can I take lithium with my antidepressant?⌄
Sometimes, under medical supervision. Lithium is occasionally added to antidepressants to enhance response. Do not combine without consulting your prescriber, particularly due to interaction risk.
References by claim
bipolar disorder (prescription dosing only)
suicide risk (population-level)
cognitive decline and Alzheimer's prevention
Track Lithium with Pilora
Set up dose reminders, check interactions, and join the community in the Pilora iPhone app.
Coming to App StoreDisclaimer: These statements have not been evaluated by the FDA. This page is educational, not a substitute for personalized medical advice. Evidence grades are AI-assisted assessments — talk to your doctor before starting any new supplement, especially if you’re pregnant, breastfeeding, on medications, or managing a chronic condition.