A visual, side-by-side comparison of how many drops of each Lugol's Solution concentration are needed to match a given amount of elemental iodine.

Iodine supplementation raises a lot of practical questions, and clear, sourced answers are hard to find. In coaching, I've learned that people stick with a routine when they understand why it works — so let's get into the why here.

The Short Answer

At 2% concentration, roughly 2.5 drops are needed to match the iodine content of a single drop of 5% solution.

The Longer Explanation

At 20% concentration, about 4 drops of 5% solution would be needed to match a single 20% drop.

This kind of side-by-side comparison is why concentration charts, not percentages alone, are the most useful reference tool.

How to Think About This Day to Day

As with anything in a wellness routine, the goal isn't to overthink it day to day — it's to understand it well enough that the routine makes sense to you.

Frequently Asked Questions

Should I talk to a doctor before starting?
Yes. Anyone considering a new supplement — especially one involving iodine — should check in with a healthcare provider first, particularly if pregnant, nursing, or managing a thyroid condition or thyroid medication.

Ryan Whitfield covers the chemistry and wellness-routine side of iodine supplementation for the Iodine Journal.

This article is for general educational purposes only and has not been evaluated by the FDA. It is not intended to diagnose, treat, cure, or prevent any disease, and is not a substitute for advice from a qualified healthcare provider — especially if you are pregnant, nursing, taking thyroid medication, or managing a thyroid condition.