E-liquid is the fluid you put in an Open Pod. At a high level, most formulations are built from a small set of well-known components: a glycol base, vegetable glycerin, flavourings, and, where the market allows, nicotine.
The base carries flavour and becomes vapour when the Device heats it. Ratios vary by recipe. Labels on bottles sold for adult use should list what is in them. Read those labels. Do not use liquids that are unlabelled or intended for something else.
Keep it ordinary
MEDO does not ask you to become a chemist. Choose e-liquid that is sold for adult e-cigarette use in your market, fill the Open Pod as the system intends, and keep bottles away from children and pets.
The device kit does not include e-liquid. That is intentional. You buy liquid separately, in strengths and flavours permitted where you live.
This is not a medical discussion. It is a product discussion. If a claim sounds like treatment, it does not belong next to MEDO.