The phrase "as a vital source" is correct and usable in written English.
It can be used to emphasize the importance of a particular source of information, support, or resources in a given context.
Example: "The internet serves as a vital source of information for researchers and students alike."
Alternatives: "as an essential resource" or "as a crucial provider".
This program has important implications for dairy veterinarians because they serve as a vital source of information for dairy producers.
And Max is more likely to do so if the company treats him as a vital source of information and as an opinion leader.
Due to their ability to differentiate into multiple cells lines, multipotent stem cells have emerged as a vital source for generating transplantable cells for use in regenerative medicine.
Bush has also emphasised welfare reform and employment creation as a vital source of human dignity and, astonishingly to the left, the need to help poor countries around the world.
As a vital source of competitive intelligence, the information contained in patents can also help companies steer their R&D and M&A programs around infringement and due diligence potholes.
It is Morsi's first state visit outside the Middle East and Africa since becoming president, underscoring Beijing's importance as one of five permanent members of the UN security council and as a vital source of trade and investment.
The listless denizens of the bar instinctively lean toward him as toward a vital source of energy, like dying plants starved for sunlight.
Inland fisheries provide employment for more people than their marine equivalents, as well as being a vital source of nutrients, a study concludes.
2Pac also cites the artist formerly known as Prince a vital source for inspiration, and sampled some of his tracks on the All Eyez On Me album.
As well as their prominence as a dessert fruit, they provide a vital source of carbohydrates to many inhabitants of the humid tropics.
As one of the most abundant blooms of late summer and early autumn, this native wildflower is for many insects, including numerous bee species, a vital source of nectar as well as nutritious pollen.
