"When I visit people's houses, and see a kitchen table full of pills, it bothers me," Aiken says.
He carries a loose-leaf binder in his service truck filled with articles from various sources about different ailments - heartburn, hair loss, high blood pressure, stiff joints - and their supposed remedies. He hands them out freely.
"He fixes my heater or my leaky faucet and then he gives me health advice," says Alison Shoemaker of Wyndmoor.
In May, Aiken received a doctorate in naturopathy from Clayton College of Natural Health in Birmingham, Ala., after four years of online study. His interest was stirred when he was a teenager at Willow Grove High School. To repel bullies, he began lifting weights and exploring nutritional supplements to add bulk.
Proponents of naturopathy believe proper nutrition can secure and prolong health. For Aiken, the holy trinity of naturopathy is exercise; raw fruits and vegetables; and a daily multivitamin and mineral supplement.
Many in mainstream medicine look askance at naturopathy, dismissing it as folk medicine and quackery, unsupported by hard science and reliable studies.
"Natural healing has been around for thousands of years," Aiken says. "Before aspirin, people chewed on willow bark to reduce fever, pain, and inflammation."
Aiken finds it ironic that more progressive elements of the medical establishment have embraced naturopathic precepts under the label "alternative medicine." There are many paths to well-being; naturopathy is the path that works for him, Aiken says.
"I'm carrying on Grandma's tradition," Aiken says. "When she told you to drink a shot of vinegar, to take a spoonful of cod liver oil, and to eat fresh fruits and vegetables, she was right."