Melatonin Caps. Highest Quality. Quick Acting. Dietary Supplement. TwinLab Melatonin Caps are easier to swallow than some rock hard tablets and dissolve faster to assure maximum absorption. No added sugars, salt (sodium), preservatives or tablet binders and coatings. This product is manufactured at our own state-of-the-art facilities with stringent quality control assuring correct potencies and outstanding product freshness.