How to reproduce

1. Setup a survival / hardcore world
2. Enter /nourish set carbohydrates 1
3. The command executes successfully

Expected behaviour

/nourish get should work
/nourish set shouldn't work

This has been fixed in v1.2.1, I removed both /nourish get and /nourish set from survival, as they exist for creative shenanigans and debugging, and getting a precise internal value feels out of place in survival, thank you for your report.