Hi Ziggen,

I would do 12.5 mg for a few more chelating rounds yet. A round is about 3 days or more. So I'd do a few more 3 day rounds before deciding to increase to 25 mg. Sometimes the symptoms can hit a person in another round.

So to be sure, it's usually recommended to use the same dose for about 4-5 rounds before being sure enough to increase.

It sounds promising already and you maybe fine to try 25 mg at this stage, but just be aware of the increase in symptoms that can sometimes hit in later rounds.