Understanding Nutrient Deficiencies in Seniors and Older Adults

Key Takeaways:

• Older adults often develop nutrient gaps because appetite declines, the senses of taste and smell dull, digestion slows, and certain medications interfere with how well the body absorbs vitamins and minerals.
• The nutrients most worth prioritizing as you age are vitamin B12, calcium, vitamin D, vitamin A, magnesium, vitamin E, potassium, choline and protein, with several needs shifting at age 71.
• Eating protein-rich, balanced meals at regular times, choosing nutrient-dense snacks, getting labs checked, and adding nutritional drinks like BOOST® when appetite is low can help close these gaps.

As we get older, our bodies change, and so do our nutritional needs. Older adults may need fewer calories than they once did, but getting enough protein, vitamins and minerals is still essential to support aging well. When appetite, nutrient absorption or eating habits change, it can become easier for nutrient gaps to develop.

Here’s what to know about common nutritional deficiencies in older adults, the most important vitamins for older adults and nutrients for seniors and how protein drinks or other nutrient-packed options may help fill gaps when regular meals are not enough.

Why Are There More Nutritional Deficiencies in Older Adults?

There are many reasons why aging adults and seniors may not get enough of the nutrients they need.

Loss of Appetite Can Make It Harder to Get Enough Nutrients

15-30 percent of older adults report significant declines in appetite.1 When we aren’t eating as much, it’s harder to get enough of all the essential vitamins and minerals we need.

What causes a loss of appetite in older adults?

• Our senses become less sharp, especially taste and smell. How much we enjoy food depends a lot on how it tastes, of course! Smell is closely tied to taste. You’ve probably experienced this when you have a stuffy nose and can’t really taste the foods you’re eating. When both taste and smell are dulled, eating can become less enjoyable.
• Eating can become painful. Dental issues, poor dental health, dry mouth or sores from medications can make eating unpleasant. If that happens, choosing nutrient-rich beverages can help.¹
• Our digestive systems change. As we age, we experience slower stomach emptying, which can make us feel fuller for longer and reduce hunger.
• Living or eating alone reduces pleasure. Older people and seniors may live alone, and when we do, we may feel less driven to cook or eat, losing that motivation.¹
• Our energy levels are lower. As we get older, our bodies may not need as many calories as they once did. But needing fewer calories doesn’t mean needing fewer nutrients. Protein, vitamins and minerals Are still important to support muscle health, energy metabolism support, and overall health and wellness.

Medications May Affect Nutrient Absorption

Older adults are more likely to take multiple medications, often to manage chronic health conditions such as heart disease, high blood pressure, diabetes or arthritis. 

While these medications can be important for overall health, some may also impact nutrient absorption. This means that even if a senior is eating a well-balanced diet, they can still struggle to absorb everything from the meal.

These medications include:²

• Heartburn or acid reflux medicines
• Diabetes medication
• Blood pressure medicines
• Mood-related medicines
• Cholesterol medicines and statins
• Breathing medicines, like asthma meds
• Certain heart or blood pressure medicines

What Are the Best Vitamins for Aging People and Seniors?

What vitamins and nutrients do seniors need most? While needs can vary from person to person, these are some of the key nutrients older adults may want to pay attention to, especially if appetite is low, meals are smaller or certain medications affect nutrient absorption. The nutrients for older people that often deserve extra attention include vitamins, minerals and protein.

Vitamin B12

One of those behind-the-scenes nutrients, vitamin B12 helps maintain blood circulation, nervous system health, and DNA synthesis. It can become harder to absorb this vitamin from food as we get older. That makes B12 worth paying attention to, especially through fish, meat, poultry, eggs, milk and fortified foods. Aim for 2.4 micrograms a day.³

Calcium

This nutrient may be known for bones and teeth, but that is only part of the story. The body leans on calcium for muscle movement, nerve signaling and healthy blood vessel function. Since bone health becomes harder to ignore with age, calcium is one to keep on your radar. Milk, yogurt and cheese are classic sources, while fortified drinks, tofu, leafy greens and canned fish with soft bones can help round things out.

For calcium, women ages 51 and older need 1,200 mg a day; men ages 51 to 70 need 1,000 mg; and men ages 71 and older need 1,200 mg.³

Vitamin D

Vitamin D is the nutrient that helps calcium do its job. It helps the body absorb calcium, while also supporting muscles, nerves and immune health. The tricky part is that it is not naturally found in many foods, so fortified milk or plant-based drinks, fatty fish and eggs can be especially helpful.

For vitamin D, adults ages 51 to 70 need 15 mcg, or 600 IU, a day; adults 71 and older need 20 mcg, or 800 IU, a day. The upper limit for adults is 100 mcg, or 4,000 IU, a day.³

Vitamin A

Vitamin A goes beyond eyesight. It also supports immune function and helps organs like the heart, lungs and other tissues work properly. You can get it from eggs, dairy and fish, plus colorful produce like carrots, sweet potatoes, spinach, mango and cantaloupe. 

Men ages 51 and older should aim for 900 mcg RAE a day, while women ages 51 and older should aim for 700 mcg RAE.³

Magnesium

A true multitasker, magnesium helps maintain muscle and nerve function, bone health and the building of protein and DNA. It shows up in a lot of the body’s everyday work. Nuts, seeds, beans, whole grains, leafy greens, milk and yogurt can all help.

Men aged 51 and older need 420 mg a day; women ages 51 and older need 320 mg a day.³

Vitamin E

Vitamin E is a potent antioxidant that helps fight free radicals in the body. Free radicals can cause oxidative stress, which may damage cells. It also supports immune health and helps cells communicate with each other. Nuts, seeds, vegetable oils, spinach, broccoli and some fortified foods are easy ways to work it in.

For adults ages 51 and older, the daily target is 15 mg.³

Potassium

Potassium helps keep some of the body’s biggest systems humming, including kidney and heart function, muscle contraction and nerve signaling. It also works closely with sodium to help balance fluids. Fruits, vegetables, beans, lentils, dairy, meat, poultry and fish all deliver it, which is exactly why variety matters. 

The adequate intake is 3,400 mg a day for men ages 51 and older and 2,600 mg a day for women ages 51 and older.³

Choline

Choline is an essential nutrient that plays an important role in cell function and is an essential component of cell membranes. It also supports nervous system health. Eggs, meat, poultry, fish, dairy products, potatoes, broccoli, cauliflower, beans, nuts and whole grains are all dietary sources of choline.

The average choline intake for men and women has been estimated at approximately 300 mg per day, which is below the established adequate intake levels of 550 mg per day for adult men and 425 mg per day for adult women.⁴

Protein

Protein earns its own spotlight because protein for seniors is so central to aging well, supporting muscle and immune health. But smaller appetites and lighter meals can make it hard to get enough from food alone. Eggs, dairy, fish, poultry, meat, beans, lentils and nuts all help, and high protein drinks for seniors can be a handy way to add protein, vitamins and minerals when a full meal just doesn't appeal.

If you’re wondering how much protein seniors need, the minimum recommended dietary allowance is 0.8 grams per kilogram of body weight a day, though older adults may need higher protein, with 1.0 to 1.2 grams per kilogram of body weight serving older adults better.⁵

How Do You Help Close Nutrition Gaps?

Now that you know about some of the common shortfall nutrients, how do you go about getting them? A healthy aging nutrition plan starts with variety.

• Build meals around a mix of protein-rich foods, fruits, vegetables, whole grains, dairy and legumes. Think protein first, then round out the plate with colorful, nutrient-rich sides.
• Eat at regular intervals during the day, and don’t skip meals.
• Choose snacks and drinks that bring something to the table, like protein, vitamins, minerals or calories when you need them. The goal is to make each bite and sip work harder.
• See your primary care provider to get labs done to ensure you don’t overlook any nutritional deficiencies.

Refer to this chart for foods and the recommended intakes for each vitamin and nutrient to shape your meals:^3,4,5

If eating enough throughout the day is difficult, or getting the nutrition you need through whole  foods, try consuming nutritionally fortified protein drinks for seniors or other nutrient-packed beverages that provide supplemental protein, vitamins and minerals to help you get the nutrition you need in a convenient way.

Sources:

1. An overview of appetite decline in older people. PubMed Central. https://pmc.ncbi.nlm.nih.gov/articles/PMC4589891/. Accessed July 8, 2026.
2. Do medicines commonly used by older adults impact their nutrient status? Exploratory Research in Clinical and Social Pharmacy. https://pmc.ncbi.nlm.nih.gov/articles/PMC9031754/. Accessed July 8, 2026.
3. Vitamins and Minerals for Older Adults. National Institute on Aging. https://www.nia.nih.gov/health/vitamins-and-supplements/vitamins-and-minerals-older-adults. Accessed July 8, 2026.
4. Choline - Health Professional Fact Sheet. Office of Dietary Supplements. https://ods.od.nih.gov/factsheets/Choline-HealthProfessional/. Accessed July 8, 2026.
5. Protein Consumption and the Elderly: What Is the Optimal Level of Intake? National Library of Medicine. https://pmc.ncbi.nlm.nih.gov/articles/PMC4924200/. Accessed July 8, 2026.