This is what it says in this book, page 3
https://jeffreydachmd.com/wp-content/uploads/2014/03/The-Guide-to-Supplementing-with-Iodine-Stephanie-Burst-ND.pdf
a. Recommended Forms
i. Lugol’s liquid – Iodine / Potassium Iodide – 2% and 5% solutions. 2%
solution is 2.5 mgs / drop. 5% solution is...