A Caregiver’s Guide to Appetite Changes and Weight Loss in Older Adults

By: Ana Reisdorf, MS, RD

If your parent’s clothes seem looser or they keep leaving meals unfinished, you may wonder whether it’s a normal part of aging or if something else might be happening. You don’t need to figure out the cause on your own. Your job is to notice what has changed, share it with your loved one, and bring clear information to their healthcare provider.

During National Family Caregivers Month, this is a practical guide to unintentional weight loss: what to do, what to watch for, what to write down, and what to ask at the next appointment.

Key takeaways

• Unintentional weight loss deserves attention, even when an older adult says they feel fine.
• Changes in appetite, eating, energy, and everyday activities can provide useful clues.
• Bring a short record of what you’ve noticed, along with a current medication and supplement list.
• Ask the healthcare provider what to do next before making major changes to your loved one’s diet.

When is weight loss in an older adult a concern?

Weight loss is unintentional when someone loses weight without trying. As a general guide, losing more than 5% of body weight over 6 to 12 months is a reason to speak with a healthcare provider. For a person who weighed 160 pounds, that’s 8 pounds. In an older adult, a smaller loss may also matter, especially if it happens alongside other changes.

There are many possible reasons someone might eat less or lose weight, including difficulty shopping for food, pain when chewing or swallowing, and health concerns. A healthcare provider can help sort through what might be causing the weight loss and whether there is reason to be concerned.

Signs and changes caregivers should watch for

You may notice a change before your loved one does. Look for patterns rather than relying on one meal or one weigh-in.

Unintentional or unexplained weight loss

If your loved one starts to lose weight, you may notice that clothes, belts, or rings may fit differently. You might also notice smaller portions or more food left on the plate. If your loved one weighs themselves, ask whether their weight has changed and when they first noticed it.

Loss of appetite or eating less than usual

A change in appetite might look like skipping breakfast, losing interest in favorite foods, or saying “I’m full” after a few bites. Ask gently whether food tastes different or whether shopping, cooking, chewing, or swallowing has become difficult.

Low energy after illness

It may take time to return to a routine after being sick. Notice whether your loved one is eating and drinking less than usual, spending more time in bed or a chair, or struggling with daily activities they previously managed well. Tell their healthcare provider when the illness happened and whether they are improving since being ill.

Changes in strength, muscle, or daily activities

Can they still carry groceries, get up from a chair, or take their usual walk? A change in what someone can do can be as important to mention as a number on the scale. Ask the provider whether nutrition, physical therapy, or an activity plan should be part of their recovery.

Questions about protein and food for energy

If your loved one eats very little or regularly skips or avoids protein-containing foods, make a note of it. Ask their provider whether their nutrition intake meets their current needs and which foods would work for their appetite and health conditions.

Poor appetite alongside diabetes or low blood sugar concerns

If your loved one has diabetes, note missed meals, changes in eating, and any low blood sugar readings or symptoms. Share these with their diabetes care team promptly. Severe low blood sugar is an emergency, so follow their prescribed emergency plan and seek immediate help when needed.

What should caregivers track before a doctor’s appointment?

A few notes are enough to help a provider identify what might be happening. The goal is to give them a picture of what your loved one is eating, weight changes, and anything else that might be relevant.

A few things to track before the appointment might include:

• Weight: Recent measurements, if available, and an approximate starting weight. Note looser clothing if there’s no scale.
• Timing: When the changes began, whether they followed an illness, and whether they seem to be continuing.
• Food and drink: Meals skipped, smaller portions, changes in favorite foods, and how often they eat protein-containing foods.
• Eating difficulties: Trouble shopping, cooking, chewing, or swallowing.
• Other changes: Appetite, energy, mood, strength, and everyday activities.
• Health information: Current medications and supplements, recent medication changes, and relevant symptoms. If they have diabetes, bring any concerning blood sugar readings.

How to talk to a doctor about an older adult’s weight loss

Start with a simple summary: “Dad wasn’t trying to lose weight, but his clothes are looser. Since he was sick last month, he’s been skipping lunch and has less energy.” Then share your notes. Give your loved one room to describe how they feel, too.

Questions to ask the healthcare provider

1. Could this weight change be medically significant?
2. Could a health condition or medication be affecting appetite, energy, or weight?
3. Are there nutrition or protein-intake concerns we should watch for?
4. Should we monitor weight, food intake, energy, or strength? If so, how often?
5. If they have diabetes or possible low blood sugar, should their nutrition or medication plan be reviewed?
6. Would a registered dietitian or another specialist be helpful?
7. What changes should prompt a follow-up call or more urgent care?

Before leaving, ask your loved one to explain the plan back to the provider in their own words. It’s an easy way for everyone to check that the next steps are clear.

Supporting an older loved one’s nutrition

Once you know the provider’s advice, look for easy ways to put their recommendations into practice. That might mean offering foods your loved one enjoys, making meals easier to prepare, eating together, or keeping convenient snacks available. For more ideas, check out our Tips for Caregivers.

Ask whether a nutritional drink would fit your loved one’s plan. BOOST Plus® and BOOST® Very High Calorie are nutritional drinks that provide extra calories and protein and may be used as part of a nutrition plan when recommended by a healthcare professional.  When recommended, a nutritional drink can help supplement a diet; it does not replace finding out why someone is losing weight.

Keep checking in with your loved one about what feels manageable. Their appetite and needs may change, and their care team can help adjust the plan along the way. The goal is to make eating a little easier and help them feel supported, one day at a time.