How aggressive are the diet plans?

See the diet plan itself before you judge how strict it is.
Judge the diet plan by its daily requirements
How strict a plan is depends on the plan in front of you. Get the written plan and read what it requires of you each day.
Turn "aggressive" into measurable diet terms
"Aggressive" is a word, not a measurement. Have the provider write out each of these:
- What you are asked to eat, avoid or track.
- How the plan is monitored, and how often.
- Which symptoms mean you should call the office.
- What happens if you cannot follow a step.
- Who can change the plan, and how you request a change.
If a provider refuses to write these down, treat the refusal as information about the provider.
If your plan includes a GLP-1 medication, read two papers on that class of drugs: the joint advisory on diet priorities for people taking GLP-1 medication for obesity and the meta-analysis of semaglutide for weight loss in adults without diabetes. Then read the academic medical center's fact sheet on weight loss medications, which covers how the drugs work, their side effects and the monitoring they need. None of these sets your plan. Hand them to your provider, then ask which points fit the plan you were given.
Mark the diet steps you may not manage
- Get the written plan ahead of any payment or signature.
- Mark every requirement you are unsure you can meet.
- Ask what a missed step costs you in results and in safety.
- Ask how to stop the plan and what stopping involves.
Keep the written diet plan as your reference
The written plan is the document that counts. Make sure you leave with a copy.