Milligrams Versus Grains

If you are considering a switch from one natural thyroid product to another, be sure to check the strength in milligrams, not in grains. The strength of natural thyroid products is usually given in grains, an outdated measurement. Since there is no consistent agreement as to exactly how many milligrams are in each grain, a 1-grain tablet of one natural thyroid product may not be the same as a 1-grain tablet of a different product. For instance, a Westhroid 1 grain tablet contains 65 mg, while an Armour^® Thyroid 1 grain tablet contains 60 mg. Therefore, it is the milligram strength, not the strength in grains, that is important.