Funnily enough I restocked using this website last week, also purchasing the 7% you mentioned. The previous Lugols I had bought from another site was 2% iirc, but seemed so much more potent (tasted stronger and the colour seemed a lot darker), when measuring out the same amounts of iodine/iodide. I was wondering whether the 7% is actualy 7% too, or if it is weaker. I also replaced the dropper included with a actual pipette dropper from my previous bottle.