Best Multivitamins for Seniors: Supporting Digestion and Nutrient Absorption as You Age

As we age, our bodies undergo significant changes that make getting the right nutrients more challenging than ever. Digestive health conditions, age-related nutrient absorption decline and balancing multiple health conditions can be some of those barriers. 

For seniors, this nutritional gap isn’t just about lower energy levels. It can also be linked to bone loss, cognitive decline, and a host of other age-related health concerns. The good news is that meeting your nutritional needs through food, and choosing supplements focused on seniors’ health, can be a game changer.  

Let’s walk through why nutrient absorption changes as we age, which nutrients matter most for digestion and absorption, and how to choose the best multivitamins for seniors! 

Why Nutrient Absorption Declines with Age 

Age-related nutrient absorption decline can be common for a variety of reasons, increasing malnutrition risk: 

• Lower caloric requirements and intakes: Energy needs decline with aging due to reduced movement, motor capabilities and lower muscle mass. Many older adults also have smaller appetites and hunger impacting how much they can eat. These combined reasons result in reduced overall amount of food (and nutrients) consumed throughout the day.  

• Reduction in stomach acid: Gastric acid is needed to better absorb certain nutrients like iron and calcium. Vitamin and mineral absorption declines with decreases in acid secretion along with taking medications that can change the acidity of gastric juices or stop production altogether. 

• Chronic diseases: Age-related diseases like heart disease, kidney disease, diabetes, and dementia may come with restrictive diets or require medications that reduce nutrient absorption.  

Common Digestive Challenges in Older Adults  

Digestive health is especially important with aging. Aging can cause shifts in all areas of our digestive tract, from our mouths all the way down to our large intestines.  

• Chewing: Digestion starts in the mouth by breaking down food into small pieces through chewing. Changes with the strength of the chew, dentition requiring softer textures and reduction in saliva can all make this mechanical digestion a hurdle.  

• Dysphagia: Difficulties with swallowing can lead to eating and drinking to feel impossible. Dehydration, pneumonia, malnutrition from not eating enough and social isolation from modified food and liquid textures are all outcomes from long term dysphagia.  

• Taste changes: Medications, changes in smell sensations and damage of salivary glands reducing saliva production change the taste of food. This may result in meals being unappealing or needing increased sodium, seasonings and sauces to enhance the plate.  
  
• Constipation: Inadequate fluid, dietary fiber intake, reduced mobility and exercise, age associated diseases, slow emptying of food from the stomach, and chronic medications increase risks of constipation. Reduced bowel movements can increase bloating, gas production and abdominal discomfort  

Nutrition Challenges in Care Settings (Appetite, Medications, Malabsorption) 

Care settings, like assisted living and long-term care, are a large life shift for a senior. Changes in living environment, access to preferred foods and polypharmacy (need for many medications) are both nutritional and care setting challenges.  

Appetite: Common reasons for decreased appetite are changes in mobility, reduced hunger drive, digestive health symptoms (like nausea or constipation), or simply not enjoying the food offered in a care setting. Serving smaller energy-rich meals, liquid nutrition instead of solid textures (like smoothies), or even improving the meal environments (music, decor) can help improve appetite.  

Medications: Polypharmacy increases risks of drug-nutrient interactions causing serious impacts on our health. Some medications may also impair how well we absorb nutrients or speed up how quickly we excrete them. Some examples include: 

• Acid blocking medications (like proton pump inhibitors used for acid reflux): Reduces absorption of vitamin B12 and iron. 
• Metformin (for diabetes): Decreases absorption of vitamin B12 and folic acid. 
• Statins (for high cholesterol): Cholesterol is required to absorb some fat-soluble vitamins like vitamin A, D and E.  
• Antibiotics: Impacts on the good bacteria in our gut can reduce absorption and digestion of vitamin K and iron. 
• Diuretics: Increase the excretion of water-soluble vitamins like B vitamins, potassium, magnesium, sodium, and vitamin C 

Malabsorption: Age-related absorption declines from progression of chronic diseases. 

Signs You May Not Be Getting Enough Nutrients 

Common signs and symptoms for not meeting your nutritional needs include:  

• Fatigue and cognitive decline 
• Muscle pain and weakness 
• Digestive health symptoms  
• Slow wound healing or a weak immune system 
• Bone health issues (reduced bone density or increased fracture risks) 
• Abnormal nutrition-related blood work  

It’s important to connect with your Family Practitioner to rule out other underlying medical reasons for your symptoms to ensure your health problems are being treated appropriately. 

HCP Reels: Supporting Digestion and Nutrient Absorption as You Age

Key Nutrients Older Adults Often Don’t absorb well (B12, D, Iron, Magnesium etc.) 

• Vitamin B12: Absorption is dependent on pepsin (a stomach enzyme) and gastric acid secretions, both of which are shown to be lower in older adults  

• Calcium/Vitamin D: Calcium absorption is controlled by our intestine’s response to the active form of vitamin D, a process that is impaired with age. Reduction in absorption of vitamin D in our intestines and kidneys plus inefficiencies in how our skin produces vitamin D also play a part in calcium absorption.  

• Zinc: An important mineral for immune function and wound healing, zinc is a common nutrient deficiency for seniors. Acid blocking medications can impact the absorption, diuretic medications increase the excretion of zinc while some individuals find it difficult eating enough zinc (commonly found in protein-rich foods).  

Multivitamin supplements can be a useful tool to bridge the gap between the nutrients seniors are missing through food or having difficulties absorbing. Single dose and liquid format multivitamins can help reduce pill burden.  

Nutritional needs vary by individual and connecting with your Health Care Team can help you determine which supplements would be best for you.  

How Multivitamins Support Nutrient Absorption  

food alone, increasing malnutrition risk. A multivitamin can provide missing nutrients from the diet, especially key micronutrients needed to help with absorption of other vitamins and minerals. 

These combinations can help increase bioavailability, or how well we absorb the nutrient. For example, a multivitamin may contain: 

• Vitamin D and K to help with calcium absorption for bone health 
• Vitamin C to support iron absorption to help with iron deficiency anemia  

Some multivitamins may be designed to provide nutrients in dosages important for the life stage you are in since vitamin and mineral needs change as we age. For example, higher amounts of calcium to reduce bone deterioration.  

Lastly, some multivitamins provide nutrients in dosages that are higher compared to what we naturally eat in our diet, which is helpful for individuals with particular nutrient deficiencies or issues with age-related absorption decline.  

Liquid vs Pill Multivitamins: Which is Better for Absorption? 

Vitamin and mineral supplements are available in a variety of forms including pills, powders and liquids. While research on the absorption of different forms multivitamins is limited, some vitamin and mineral pills are released in particular parts of the digestive tract which can impact absorption for those with impaired digestion (e.g. post bariatric surgeries, inflammatory bowel diseases) so a liquid may be easier to absorb for particular disease states.  

Further, Individuals with dysphagia or difficulties swallowing pills may benefit from a liquid multivitamin to make consuming the nutrients easier. 

How to Choose the Best Multivitamin for Older Adults   

Aiming to obtain all our nutrients through food can be tricky. A multivitamin may help to bridge the gap Aiming to obtain all our nutrients through food can be tricky. A multivitamin may help to bridge the gap between barriers to eating enough nutrients and meeting our daily needs. Here are some tips on choosing the best multivitamin for seniors:  

• Meeting your Recommended Dietary Allowance (RDA): Compare the nutrients you eat to the amount of vitamins and minerals provided in the supplement and opt for supplements that help you get closer to your RDA. Having a supplement that exceeds your daily needs may be harmful to your health (unless otherwise recommended by your Health Care Team).  

• Health Canada Standards: Check for a Natural Product Number (NPN) or a Homeopathic Medicine Number (DIN-HM) to ensure it meets safety, quality and health claims.  

• Check for other ingredients: If you have dietary restrictions, sensitivities or allergies, take a look at the ingredients list since some multivitamins may contain wheat, corn, eggs, or other animal products (e.g. gelatin).  

Aging brings a unique set of nutritional challenges. From reduced stomach acid and digestive difficulties to polypharmacy and care setting transitions, all these changes can contribute to poor nutrient absorption and increased malnutrition risk. A multivitamin can be a useful tool to assist in the nutrition gap between nutrients consumed through food and age-related absorption decline. To learn more about nutrient deficiencies in older adults and digestive health resources sign up for the CDHF monthly newsletter.  

FAQs 

1. Are liquid multivitamins better absorbed than pills?  

• Liquid multivitamins may be useful for individuals with specific digestive health conditions or those with swallowing concerns.  

2. Why do older adults struggle with nutrient absorption?  

• Lower caloric requirements and oral intakes, reduction in stomach acid, and chronic diseases (including a need for many medications) can all change how seniors absorb nutrients. 

3. Can medications affect vitamin absorption?  

• Absolutely. Some medications can impair how well seniors absorb vitamins and minerals while other medications and cause nutrients to be excreted from the body more quickly.  

References: 

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