GLP-1s after 50

These drugs work at any age. The risks are not identical at every age, and the muscle and bone question deserves more attention than it gets.

This is not an argument against taking a GLP-1. Obesity carries serious risks of its own, and these medications work. It is an argument for going in with a specific set of questions — the ones a good clinician will raise anyway.

What changes with age

Rapid weight loss costs lean mass as well as fat, and older bodies are already losing muscle. That matters for falls, frailty and independence more than for a number on a scale — which is why protein intake and resistance training stop being optional advice and start being the point.

Questions worth asking before you start

1. Given my age and medical history, is a GLP-1 the right choice for me at all?
2. How much protein should I be eating each day while I am losing weight?
3. Should I be doing resistance training, and do you have a referral for someone who can set that up safely?
4. Should we monitor my muscle mass or bone density, and how?
5. I take [list everything]. Do any of these need adjusting? GLP-1s slow stomach emptying, which affects how oral medications are absorbed.
6. What is the plan if I want to stop later — do we taper, or move to a maintenance dose?

Other things that matter more with age

• Constipation is close to universal on these drugs and is more of a problem if you are already prone to it.
• Dehydration. Appetite loss reduces drinking as well as eating, and older adults dehydrate faster with worse consequences.
• Any procedure involving sedation. Tell the anaesthetist you are on a GLP-1 well in advance — delayed stomach emptying raises aspiration risk and there is specific guidance on pausing beforehand.
• Existing medications. Insulin and sulfonylureas in particular often need adjusting; so can anything with a narrow therapeutic window.