Lithium is best known as a psychiatric drug used to treat bipolar conditions; however, it’s also a trace mineral found in our water and food. There are some reasons why focusing on lithium may help your ADHD, so read on to learn more.
1. Lithium Regulates Dopamine and Glutamate Signaling
ADHD brains run into trouble with two systems in particular: dopamine and glutamate. Dopamine regulates motivation, reward, and attention. Glutamate is the brain’s primary excitatory neurotransmitter, essentially meaning it helps with that ‘go’ energy… and go and go and go.
At therapeutic doses, lithium it dampens both of them: lithium reduces excessive dopaminergic and glutamatergic activity while enhancing inhibitory GABA and serotonergic signaling (Bertollo et al., 2026). That’s part of why lithium treats bipolar mania, which is connected usually with a state of dopamine and glutamate excess.
Similar research on kids with conduct disorder (which is highly connected with ADHD) finds that therapeutic doses can help those kids feel more in control and more regulated (Campbell et al., 1984; Campbell et al., 1995). It’s not necessarily ADHD, but still correlated.
In another study, researchers found that the ADHD kids with low levels of lithium at the start who took a high-dose broad-spectrum multinutrient that contained lithium among other nutrients trended toward being the most helped by the supplement (Robinette et al., 2024).
2. Lithium Protects and Builds Neurons
Independent of dose, lithium has one of the most well-documented neuroprotective profiles of any compound studied. It activates BDNF (brain-derived neurotrophic factor), a protein responsible for neuron survival and growth, increases N-acetyl-aspartate, a biomarker of neuron health, and is associated with measurable increases in gray matter volume in patients treated over time (Quiroz et al., 2010).
That being said, these findings come almost entirely from therapeutic drug-dose lithium, the monitored, prescription version, not the trace amounts found in food. Whether the same neuroprotective effects show up at dietary intake levels hasn’t been directly tested.
3. Population Studies Link Water Lithium to Lower Suicide Rates
Starting in the 1970s, researchers noticed that areas with naturally higher lithium concentrations in drinking water tended to have lower rates of suicide. A 2020 systematic review and meta-analysis pooling ecological studies across multiple countries confirmed this pattern statistically, finding a consistent inverse association between water lithium levels and suicide mortality (Memon et al., 2020). A separate 2024 systematic review found a similar protective association between trace water lithium and dementia risk, though the effect appeared only above certain concentration thresholds and wasn’t consistent across every study (Fraiha-Pegado et al., 2024).
While it’s not causal, there is a connection between having a higher intake of lithium with better mental health and brain outcomes — and a regulated brain means it’s easier to handle your core ADHD symptoms.
4. Glucose/Insulin Regulation
Lithium’s therapeutic effect may also be connected to insulin signaling rather than neurotransmitters directly. Researchers found that the PI3K/Akt pathway, a signaling route that insulin uses to regulate glucose metabolism, is affected positively by lithium’s action on glycogen synthase kinase-3 (GSK3) (Campbell et al., 2022). AKA: Lithium may help correct the impaired insulin signaling in the brain that is connected with many people who have ADHD.
Of course, this is more on the hypothetical side as most research on lithium and insulin is connected with therapeutic doses in people with bipolar disorder. However, many people with BP as well as ADHD have some form of diabetes, so the lithium-insulin connection makes sense.
5. Specific ADHD-Lithium Research
The real research on lithium and ADHD specifically is very small, and nearly all of it used therapeutic pharmaceutical doses, not food-level intake.
A small randomized, double-blind crossover trial compared methylphenidate to lithium (dosed up to 1,200 mg/day, prescription-level) in adults with ADHD and found similar improvements in hyperactivity, impulsivity, and irritability between the two (Dorrego et al., 2002).
Several older double-blind, placebo-controlled trials tested lithium carbonate in hospitalized children with aggressive conduct disorder, again at pharmaceutical doses (500-2,000 mg/day), and found it reduced aggressive behavior compared to placebo (Campbell et al., 1984; Campbell et al., 1995; Malone et al., 2000).
No trial has tested whether trace, food-level lithium changes ADHD symptoms, but one study on this high-dose broad-spectrum multinutrient that contains lithium found that — of the kids who took the supplement — the ones who were low in lithium trended toward being more likely to benefit from it.
Sources of Dietary Lithium
Lithium is likely present in foods such as cereal grains, leafy vegetables, and root crops, along with drinking water, though it isn’t yet clear which foods are the most significant contributors, and concentrations vary enormously depending on local soil and water source.
Lithium content in food is inconsistent even within the same crop. There’s no reliable way to eat your way to a specific lithium intake the way you can with, say, vitamin C, unless you take a supplement.
Conclusion
Lithium at pharmaceutical doses has well-documented effects on the ADHD-relevant systems: dopamine, glutamate, and neuroprotection (Bertollo et al., 2026; Quiroz et al., 2010). Lithium at dietary levels has interesting population-level associations with mental health outcomes (Memon et al., 2020; Fraiha-Pegado et al., 2024), but no research directly connects it to ADHD symptoms.
If you’re curious about your own lithium levels, talk to your physician to test your levels and potentially supplement if they are low. If you want to know for certain if your nutrient levels are making your ADHD harder to handle, I’ve put together the ultimate ADHD blood test guide based on the current ADHD nutrition research. Grab your $5 copy today, feel confident going to your doctor when you get that appointment set up.
This article summarizes the research from the aforementioned studies and the author’s knowledge. It is for educational purposes only. Nothing in this article constitutes medical advice.
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