@annedallas wrote: "...lithium level to be "under 0.3 L" and the reference range to be "0.6-1.2 mmol/L"..."

@memoriestomoments helpfully replied: "...LO is most likely 0.3 mmol/L under the lower end..."

I'm quite surprised to see no further discussion about this. Many comments here on Mayo Connect address the chance that Lithium level in the brain may both cause and cure MCI and Alzheimer's (see the other Connect topics and google this: harvard 2025 alzheimer's).

Having read the two comments above, I'm curious if Lithium Orotate (LiO) dose could be adjusted based on the target range. I was unclear whether the fluid mentioned is blood or spinal fluid, so I asked Google Gemini and got this:
"A target range of 0.6 - 1.2 mmol/L (often also expressed as mEq/L) refers to blood (specifically serum or plasma) when monitoring the concentration of the medication lithium. This specific range is used for psychiatric maintenance therapy to ensure the drug is effective at stabilizing mood while avoiding dangerous toxicity. The optimal target within this window depends on the individual and the condition being treated."