Short answer: Both release lithium, but only lithium orotate has published data showing the lithium actually reaches the brain. Lithium aspartate hasn't been measured that way. That's why Mentaid uses lithium orotate, at a conservative 0.2 mg of elemental lithium. See the formula
You're here because you've decided you want a low-dose lithium supplement, and now you're trying to figure out which form to take.
Lithium orotate and lithium aspartate are the two you'll see most often. They look similar on the label. They're priced about the same. They both claim to deliver lithium.
So does it matter which one you pick?
Yes. And the reason is simpler than you'd expect.
They Both Release Lithium. That's Where the Similarities End.
Both forms are lithium salts. Both dissociate in your body and release lithium ions. The difference is the carrier molecule: orotate uses orotic acid, aspartate uses aspartic acid.
At first glance, that seems like a trivial distinction. Same letter, different envelope. But with supplements, you don't just care that lithium gets released into your bloodstream. You care that it gets where it needs to go: your brain.
And that's where one of these forms has published data and the other doesn't.
Lithium Orotate Has Published Brain Distribution Data
Animal studies have directly measured brain lithium concentrations after lithium orotate administration. Researchers confirmed that lithium reaches the central nervous system after orotate supplementation, and that measurable levels are achieved in the brain.
Lithium orotate has been tested, and the lithium was shown to reach the brain. Directly measured. Not theorized, not extrapolated.
Lithium Aspartate Has Not Been Measured This Way
For lithium aspartate, there are no widely cited studies measuring brain lithium concentrations in the same structured way. No published animal data showing how much lithium actually reaches the brain after aspartate administration.
To be precise: this doesn't prove aspartate is worse. It might deliver the same amount of lithium to the brain. It might deliver more. It might deliver less.
The problem is that nobody has measured it. So we don't know.
And when you're choosing a supplement you plan to take every day for your brain, "we don't know" is not a reassuring answer.
Side by Side
Lithium Orotate
- Published brain distribution data
- CNS penetration directly measured
- Brain levels confirmed in research
- Decades of documented supplemental use
Lithium Aspartate
- No published brain distribution data
- CNS penetration not directly measured
- Brain levels unknown
- Less overall pharmacokinetic documentation
The Form With the Data, at a Conservative Dose
Mentaid contains 5 mg of lithium orotate (0.2 mg elemental lithium) alongside vitamins B6, B9, and B12, magnesium glycinate, and lion's mane. Four physicians chose every ingredient and dose based on placebo-controlled human research.
See Mentaid's Dose and FormulaFrom $32.83/bottle · Free shipping · 90-day money-back guarantee · Cancel anytime
Why This Should Be the Deciding Factor
In medicine, we don't choose treatments based on what we assume works. We choose based on what's been measured. That principle doesn't stop applying because something is sold over the counter.
Lithium orotate has published data showing it reaches the brain. Lithium aspartate does not. Both might work, but only one has been directly studied in the way that matters.
That's why we formulated Mentaid with lithium orotate.
The Bottom Line
If you're choosing between lithium orotate and lithium aspartate, the question isn't which one is theoretically better. It's which one has actually been studied in a way that matters: with published data showing it reaches the brain.
Right now, that's lithium orotate. Until comparable data exists for aspartate, that's the form we'd choose, and it's the form we did choose.
For a deeper look at lithium orotate's safety profile, dosing, and clinical research, read our complete guide to lithium orotate. For help understanding how much elemental lithium you're actually getting, see our dosage guide.
0.2 mg Elemental Lithium, by Design
Six research-backed ingredients in two capsules a day, at doses chosen by four physicians, including three psychiatrists who prescribe lithium.
Choose Your PlanFrom $32.83/bottle · Free shipping · 90-day money-back guarantee · Cancel anytime
References
1. Kling MA, Manowitz P, Pollack IW. Rat brain and serum lithium concentrations after acute injections of lithium carbonate and orotate. J Pharm Pharmacol. 1978.
2. Quiroz JA, et al. Molecular effects of lithium. Mol Interventions. 2004.
0 comments