What is known and what is not
Public descriptions characterize the water as an oligomineral sulfide hypotherm and associate the spa with supervised treatment for several conditions. Lithium is sometimes listed among trace elements, but a current, authoritative public value in milligrams per litre has not been identified.
Humanika therefore treats “lithium spa” and neuro-restorative use as research questions, not therapeutic claims. Any program would require current laboratory analysis, medical governance, ethics review, and clear contraindication guidance.