Used and loved by millions
Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com
kept on rich
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "kept on rich" is not correct and does not convey a clear meaning in written English.
It seems to be an incomplete or incorrect expression, and without additional context, it is difficult to determine its intended use. Example: "He was kept on rich food during his recovery." (Note: This is a hypothetical example assuming a correction to "kept on rich food.")
⚠ May contain grammatical issues
Science
News & Media
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified examples from authoritative sources
Exact Expressions
3 human-written examples
Subsequently, the weaning weight of the lambs was measured and the farmers selected the lambs to be sent directly for slaughter, and those to be kept on rich pasture, for finishing.
Kept on rich food, flies produce 60 times more eggs than those on poor food (Drummond-Barbosa and Spradling, 2001).
Science
To analyze let-7 levels at different conditions, germaria of OregonR flies were dissected and analyzed using RT-qPCR: young (1 3 days) and old (21 days) flies were compared; flies were kept on rich food or poor food (sugarfree) for 2 days; or were kept at 18°C or 29°C for 2 days.
Science
Human-verified similar examples from authoritative sources
Similar Expressions
56 human-written examples
Just kept on crying.
Science
One sham group was kept on the rich food, while the other was put on a weight-loss diet.
News & Media
This was a pity, especially when Mr. Vonk's pacing of events was so sure, and when the orchestra kept on producing rich textures that just needed a little more precision and polish.
News & Media
If the latest issue of the National Centre for Social Research's British social attitudes survey is to be believed (see chart), rich urbanites are going to keep on coming.
News & Media
Mpairwe and his colleagues at Makerere University are completing a study in which Ankoles and crossbreeds were kept on nutrient-rich diets.
News & Media
After many generations, flies forcibly kept on menthol-rich food consistently avoided oviposition on this substance, whereas 'choice-line' flies showed a decreased aversion to menthol, indifference or even attraction at some generations.
Science
The moves signalled that Widodo, who took office last year, is easing the tight grip that Jakarta has long kept on the mineral-rich province, where poorly armed fighters have for years fought a low-level insurgency against the central government.
News & Media
In their study, mice were fed a high-caloric carbohydrate-rich or a fat-rich diet for six weeks and were compared to mice kept on a purified low fat diet, respectively.
Expert writing Tips
Best practice
When using "kept on" followed by an adjective, ensure the adjective clearly modifies a noun that provides context (e.g., "kept on rich food", "kept on rich diet").
Common error
Do not use "kept on rich" without specifying what is rich. Always complete the phrase with a noun (e.g., "kept on rich food", "kept on a rich diet").
Source & Trust
84%
Authority and reliability
2.8/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "kept on rich" functions as a prepositional phrase but its precise grammatical role depends on the context. While it appears in some examples, Ludwig AI highlights its grammatical awkwardness. Therefore, its function will depend on rewriting it as modifying a noun or verb.
Frequent in
Science
40%
News & Media
30%
Formal & Business
10%
Less common in
Encyclopedias
5%
Wiki
5%
Reference
5%
Ludwig's WRAP-UP
In summary, the phrase "kept on rich" is grammatically questionable and requires careful contextualization to be used correctly. Ludwig AI considers the phrase to be incorrect, advising to rewrite the sentence. Although it appears in some sources, it's essential to specify what is "rich" to avoid ambiguity. Consider alternatives like "maintained on a rich diet" or "provided with rich sustenance" for better clarity and grammatical correctness. While its register is generally neutral, opting for more precise language is recommended in formal settings. The phrase has low frequency; therefore, its use should be carefully considered and potentially replaced with clearer alternatives.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
Kept on nutrient-rich diet
Adds the word 'nutrient' to provide a specific detail about the richness.
Maintained on rich resources
Replaces "kept" with "maintained" and uses "resources" to provide context.
Sustained by rich provisions
Uses "sustained" to indicate ongoing support and "provisions" to specify the source of richness.
Provided with rich sustenance
Emphasizes the act of providing and uses "sustenance" to highlight nutritional support.
Supplied with abundant nutrients
Focuses on the supply of nutrients and uses "abundant" to amplify the richness.
Nourished by rich elements
Highlights the nourishing aspect, specifying "rich elements" as the source.
Supplied with abundant nutrients
Emphasizes the supply of nutrients and uses "abundant" to amplify the richness.
Fed a rich diet
Focuses on the dietary aspect and specifies that the diet is rich.
Given a wealth of resources
Emphasizes the wealth or abundance of resources provided.
Maintained on a high-quality diet
Highlights the quality of the diet, suggesting a superior nutritional profile, instead of focusing on richness.
FAQs
How can I correctly use "kept on rich" in a sentence?
To use "kept on rich" correctly, ensure you specify what is rich. For example, "The lambs were kept on rich pasture to improve their weight".
What is a more grammatically sound alternative to "kept on rich"?
Alternatives include "maintained on a rich diet", "provided with rich sustenance", or "fed a rich diet", depending on the specific context. You can also use something like "nutrient-rich".
What does it mean to be "kept on rich"?
The phrase suggests being sustained or maintained by abundant resources or provisions. The exact meaning depends on the context (e.g., a diet, pasture, etc.). Consider rewriting the sentence to be clearer.
Is "kept on rich" considered formal or informal language?
Due to its somewhat awkward phrasing, "kept on rich" is best avoided in formal contexts. More precise and grammatically conventional alternatives are preferable.
Editing plus AI, all in one place.
Stop switching between tools. Your AI writing partner for everything—polishing proposals, crafting emails, finding the right tone.
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
84%
Authority and reliability
2.8/5
Expert rating
Real-world application tested