Some years ago, I was very pleased to find for sale at Vitamins Because You Are Worth It, a nutritional supplement which is seldom sold elsewhere, and was surprised to receive more quantity (bottles of capsules) than I had ordered -- namely para-amino-benzoic acid, which had been proven to be health-beneficial for the pituitary gland and which is known to remain color in one's hair in old age. This supplement had been recommended by the United States Government during the administration of Franklin Delano Roosevelt.
Incidentally, the URL of the website was, since then, changed from ending in "biz" to ending in "us".