high in + substance/quality
Showing large amounts inside something
Use high in for ingredients, nutrients, or qualities.
The sauce is high in salt.
high in, on, for, of, or at?
Different prepositions after high create different meanings. High in and high on are especially common, while others are more limited or contextual.
Quick answer
How do you use high with prepositions?
Use high in for contents or levels inside something. Use high on for enthusiasm, ranking, or being affected by a drug. High for compares something with an expected level. High at usually refers to measurement or position. High of is not a standard adjective-preposition pattern.
This cereal is high in fiber.
She is high on the candidate.
Prices are high for this season.
She is high on the candidate.
Prices are high for this season.
Choose the pattern by meaning
These forms are not interchangeable. Choose the construction by meaning, not by which preposition appears most often.
high on + enthusiasm/topic
Showing enthusiasm or strong approval
High on can describe excitement or strong support.
Investors are high on renewable energy.
high on + drug
Describing the effect of drugs
High on is also used for intoxication or drug effects.
He was high on painkillers after surgery.
high for + standard/time
Comparing with what is usual or expected
Use high for when something exceeds a normal level.
Temperatures are high for October.
high at + measurement
Giving a measured level or position
High at is used before figures or measurements.
Inflation remained high at 8 percent.
See the difference in context
The same subject can take different constructions because each sentence answers a different question.
Construction
Example
Meaning
high in
Yogurt is high in protein.
Contains a large amount of something.
high on
She is high on the new proposal.
Very enthusiastic or supportive.
high for
The rent is high for this area.
Higher than expected in comparison.
high at
The river was high at noon.
Refers to level, measurement, or position.
high of
The phrase high of sugar is nonstandard.
English normally uses high on or high in instead.
Common mistakes
Some combinations appear in real text but do not mean what learners often assume.
Using of instead of in
Use high in for substances or contents.
✕ This snack is high of sugar. ✓ This snack is high in sugar.Confusing high on and high in
High in refers to contents, while high on often refers to enthusiasm or drug effects.
✕ She is high in the actor. ✓ She is high on the actor.Using at for contents
At is used for levels or measurements, not ingredients.
✕ The meal is high at fat. ✓ The meal is high in fat.Quick practice
Choose the expression that matches the intended meaning.
1. This fruit is high ___ vitamin C.
2. They are high ___ the new marketing plan.
3. The price is unusually high ___ a small town.
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Frequently asked questions
Can high on mean enthusiastic?
Yes. High on something can mean very enthusiastic or supportive.
What is the difference between high in and high on?
High in refers to contents or amounts inside something. High on usually refers to enthusiasm, rankings, or drug effects.
Is high of correct English?
No. Standard English normally uses high in or high on depending on the meaning.
Related preposition guides
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