Merck said Zioptan is the first preservative-free prostaglandin analog ophthalmic solution.

WSJ: New Drug Approved to Treat Eye Condition

State and federal health organizations are investigating Main Street Family Pharmacy, LLC, in Newbern, Tennessee, and its preservative-free methylprednisolone acetate, or MPA, a steroid product used for a range of conditions.

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Patients contracted fungal meningitis -- which results in inflammation of the membranes covering the brain and spinal cord -- after their spines were injected with a contaminated, preservative-free steroid called methylprednisolone acetate, health officials have said.

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Now baking some 8, 000 to 10, 000 oil- and preservative-free cupcakes each week (a second location has recently been added uptown), quality remains uncompromised by quantity as he sticks firm to his philosophy of same-day baked desserts with the sponge made strictly with real milk, sugar, cream and butter.

BBC: Toronto��s sweetest spots

In one study, published in 2004, researchers found that a diet free of artificial colorings and the preservative sodium benzoate appeared to reduce hyperactive behavior among preschoolers.

CNN: FDA weighs food dye, hyperactivity link