"source of nourishment" is correct and usable in written English.
It can be used to refer to anything that provides sustenance, such as food or other forms of nutrition. For example: "The garden was a source of nourishment for the family, providing them with fresh produce all year round."
In this difference I find a source of nourishment.
Rice is a major source of nourishment for billions of people around the world.
A source of nourishment might be deemed "hot" or "cool," regardless of its actual temperature.
Khan said art had always been: "A great source of nourishment for my mind, my body and my heart.
"Chayote" – the payment for a shill – is described as "the main source of nourishment for the 'journalists' closest to power.
For millennia, root vegetables were the most dependable source of nourishment that most people on the planet had.
Frequently the literature of delight has underground sources of nourishment and inspiration: oral tradition, nursery songs, and the folkish institutions of the chapbook and the penny romance.
LIKE plane-crash survivors forced to eat their fellow passengers, investment bankers have found some sources of nourishment amid the wreckage of the banking industry.
The design of the bioreactor is ingenious, said Dr. Vacanti of Boston, because it allows sources of nourishment and other fluids to permeate the pores of the scaffold as new bone grows within the pores.
Obviously, if the coming and going between planets should result in a biological disaster to human beings or their principal sources of nourishment, the stature of man, the species, would be diminished conceivably to zero.
"We need to do more research, but it is hard to escape the conclusion that these bats have been turning to humans after being deprived of the forest animals that provide their natural sources of nourishment," an environmental agency spokesman said.
