The phrase 'vegetable source' is correct and can be used in written English.
For example, you could say: "I try to get most of my daily nutrition from vegetable sources."
It's the single best vegetable source at the Greenmarket.
Broad beans are an excellent vegetable source of protein and fibre.
In order to obtain monomers from vegetable source, the castor oil epoxidation process was investigated.
It can be a potentially superior alternative adjuvant to sunscreen products allowing the use of the renewable vegetable source.
Carrots Carrots do help you see in the dark because they're loaded with beta-carotene, the vegetable source of vitamin A (retinol) which is needed by the retina of the eye for black and white vision.
Mushrooms are the only natural fruit or vegetable source of vitamin D. They've got a lot of other things going for them too.
The omega-3s found in vegetable sources differ from those found in fish.
For α-linolenic acid (ALA) obtained from vegetable sources, the effect on cognitive decline is unknown.
Like all shojin ryori (temple cuisine), stocks and broths in the fucha kitchen are made entirely from vegetable sources.
Also, butter contains cholesterol, which can raise blood levels of cholesterol in some people; margarine, which is made from vegetable sources, does not.
Applying chemicals to fruits to rid them of other chemicals seems almost self-defeating, but the bottle assures us that Fit is "made from 100percentt vegetable sources".
