Anorexia of aging is the clinical term for the reduction in appetite that accompanies growing older. It's not an eating disorder in the psychiatric sense: it's a geriatric syndrome with multiple causes (physiological, pharmacological, psychological, social) that leads to reduced caloric and protein intake, resulting in malnutrition, sarcopenia, and frailty. It affects 15-30% of non-institutionalized elderly people and up to 60% of those in institutions. It's one of the strongest predictors of mortality in older adults.

Causes of Reduced Appetite in Older Adults

Physiological causes: reduced sense of smell and taste (flavors seem less intense, food less appetizing), slowed gastric emptying (feeling full after just a few bites), reduced intestinal motility, altered satiety hormones (cholecystokinin CCK increases with age: causes earlier fullness; leptin may be altered). Pharmacological causes: many medications reduce appetite (digoxin, anticholinergics, opioids, some antidepressants, chemotherapy drugs, metformin). Reviewing medications with a doctor is always recommended for older adults with reduced appetite. Psychological causes: depression is the most important and most frequently underestimated psychological cause. Grief, social isolation, and loss of independence suppress appetite, often before showing other symptoms. Practical causes: difficulty shopping, cooking, opening containers, eating alone.

How to Stimulate Appetite in Older Adults

Food presentation: color, aroma, and aesthetic presentation of meals influence appetite in older adults too. A well-prepared, colorful, fragrant plate stimulates salivation and the desire to eat. The same plate every day in a gray plastic container stimulates nothing. Meals with company: social context increases food consumption by 20-30% compared to eating alone. Adult day centers, lunch with family at least a few days a week, friends: any solution to break the loneliness of mealtimes. Small frequent meals: six small meals of 200-300 kcal are more manageable than three large meals for an older adult with early satiety. The time between meals shouldn't exceed 3-4 hours. Highly palatable foods: this isn't the time to impose restrictive diets. If an older adult eats only certain things, start with those and enrich them nutritionally. The jam they love on biscuits can be a vehicle for B vitamins from whole grain biscuits. Food temperature: many older adults prefer hot food (it stimulates smell and salivation): always serve hot, never lukewarm or cold except in special cases.

How to Enrich Meals Without Increasing Volume

The principle of concentrated nutrition: every spoonful should deliver as many nutrients as possible. Extra virgin olive oil added to everything (100 kcal per tablespoon: invisible in flavor, transparent in vegetable soup). Grated Parmesan on every savory dish (protein + calcium + flavor). Powdered skim milk mixed into soup or pureed vegetables (10g per tablespoon = 3.5g protein, invisible). Almond butter in yogurt (healthy fats + protein). Beaten eggs in soups (1 egg in hot broth = 6g additional protein). Creamy cheeses mixed into pasta or creams (ricotta, stracchino: protein + calcium + palatability). With these enrichments, you can add 300-400 kcal and 15-20g of protein daily without increasing the perceived volume of meals.

Oral Nutritional Supplements (ONS) for Older Adults

When dietary modifications aren't enough, oral nutritional supplements (ONS) like Fortimel, Resource, Ensure are indicated for malnourished or at-risk older adults. They're not "supplements" in the common sense: they're complete foods in liquid format (200-300 ml, 200-400 kcal, 15-20g protein) to be consumed between main meals or as a snack replacement. They won't suppress appetite if taken between meals at appropriate intervals. They require medical prescription for NHS reimbursement under specific conditions (dysphagia, diagnosed malnutrition, post-surgery).

The Concentrated Nutrition Method: How to Implement It at Home

Every morning: prepare a small jar of "superfood" to add to everything throughout the day: 2 tablespoons of extra virgin olive oil + 2 tablespoons of grated Parmesan + 1 tablespoon of powdered milk. Add this mix to the midday soup, evening broth, or pasta. With these three ingredients you add about 250 kcal and 8g of protein without increasing the perceived volume of the meal by even a spoonful. This technique, taught to family caregivers, can make the difference between malnutrition and maintaining weight.

Nutritional Assessment in Older Adults: The Mini Nutritional Assessment

The Mini Nutritional Assessment (MNA) is a validated tool for assessing malnutrition risk in older adults. It's an 18-question questionnaire that evaluates: appetite loss in recent weeks, weight loss, mobility, psychological stress, neuropsychological problems, body mass index. A score below 17 indicates malnutrition, between 17 and 23.5 indicates risk. Available free on the Nestlé Institute for Nutrition website. Useful as a screening tool for caregivers and general practitioners.

When Reduced Appetite Is a Sign of Something Serious

Sudden reduction in appetite (over the last 2-4 weeks, not gradual over time) in an older adult who previously ate normally should be evaluated by a doctor. Serious causes to rule out: depression (leading cause), cancer (cancer cachexia is second), chronic latent infection, organ failure (cardiac, renal, hepatic), hypothyroidism, hypercalcemia. Don't wait months before consulting a doctor about sudden appetite loss: diagnostic timing in older adults is critical.