If you have problem nails, you can prove for yourself what medical tests have shown ... a daily supplement of 1 envelope of Knox has been effective in correcting 7 out of 10 cases of brittle, splitting nails! Drink the KNOX DRINK daily, making it with fruit juice, vegetable juice, bouillon or water, or enjoy your daily envelope of Knox in the new delicious fun-to-eat fruit bar form on page 14.