adjective. Causing or conducive to poor health; unwholesome.

Not healthful; injurious to health; insalubrious; unwholesome; noxious, physically or morally: as, an unhealthful climate or air.

adjective. Not healthy; detrimental to health.

adjective. detrimental to good health

adjective. not sanitary or healthful

adjective. detrimental to health

"But they're complicated by all kinds of issues, including unclear definitions of what's "unhealthful," the debate over whether the food industry's voluntary changes can be sufficient and the expanding field of venues through which those companies can reach children."