Everything you need to know about nutritional supplements for dogs

When it comes to caring for dogs, good nutrition is always the foundation. And although a complete, balanced diet should cover most needs, there are cases where targeted supplements make a real difference for joints, digestion, skin health, and stress. This guide covers the main categories: what they are, when they help, and what to watch out for.

What are dietary supplements for dogs?

Dietary supplements for dogs are formulated products designed to complement their regular food. They provide extra vitamins, minerals, or other nutrients that may be insufficient in the daily diet. They come in tablets, powders, chews, and liquids, making them straightforward to incorporate into a routine.

IMBY makes a range of supplements specifically designed for dogs:

Common nutritional needs of dogs

Dogs have specific nutritional needs that must be met for overall well-being.

1. Proteins: essential for growth, tissue repair, and maintenance. High-quality sources include meat, fish, eggs, and dairy. Dogs are omnivores and can also obtain protein from plant-based sources such as pulses and grains.
2. Fats: a concentrated energy source that supports healthy skin and coat, and a range of bodily functions. Healthy fats include omega-3 and omega-6 fatty acids, found in fish oil, linseed oil, and plant-based oils.
3. Carbohydrates: fuel for daily activities. Found in grains, vegetables, and fruit.
4. Vitamins and minerals: essential for immune function, bone health, and nerve function.
5. Water: the most critical nutrient. Supports temperature regulation, digestion, and nutrient transport throughout the body.

How do you choose the right dietary supplement for your dog?

With many options available, choosing the right supplement isn't always straightforward. Here are the key steps:

1. Understand your dog's needs: different dogs have different requirements based on age, breed, weight, and specific health concerns. Define what you're trying to address before choosing a product.
2. Consult your veterinarian: your vet can advise on the type and dosage of supplements appropriate for your dog's situation, and rule out underlying conditions that require proper treatment rather than supplementation.
3. Choose high-quality products: cheaper supplements often contain fillers with little nutritional value. Products from reputable brands that are transparent about their formulations are a safer choice.
4. Read the ingredients list: avoid supplements with artificial additives or undisclosed fillers. The simpler and more transparent the label, the better.

Popular dietary supplements for dogs

If you're looking for high-quality dog supplements, here are three brands worth considering:

• IMBY: produces nutritious snacks and supplements tailored to specific needs: sleep support, joint health, digestion, and skin and coat condition. Full range available at curafyt.com.
• Canifelox: offers a range of dog supplements targeting specific health concerns. Their 'Calm' supplement is designed for stress-prone dogs.
• Dog Optimal: produces natural dog supplements focused on health and vitality.

The benefits of dietary supplements for dogs with joint problems

Joint problems can make walking or running painful and limit your dog's range of motion. Supplements can help at several levels:

A key benefit of joint supplements is reducing inflammation. Glucosamine and chondroitin, the most studied joint supplement ingredients, have been shown to reduce markers of joint inflammation and provide pain relief in dogs with osteoarthritis [1].

Joint supplements can also improve mobility. In controlled studies, dogs supplemented with omega-3 fatty acids from fish oil showed measurable improvements in weight-bearing on affected joints compared to controls [2].

Over time, these supplements can support cartilage maintenance. Cartilage acts as a cushion between bones, and its gradual breakdown is the primary driver of joint discomfort. Glucosamine is a precursor to glycosaminoglycans, which are key structural components of cartilage [1].

Are dietary supplements for dogs safe? And what are the side effects?

Supplements can cause side effects, particularly when introduced too quickly or at too high a dose. Always start with the recommended dose and monitor your dog closely.

Common side effects in dogs

1. Lethargy: some dogs may seem more tired than usual when starting certain supplements.
2. Increased thirst: certain supplements can cause increased water intake and more frequent urination.
3. Digestive problems: vomiting or diarrhoea when starting a new supplement can indicate a side effect, allergy, or intolerance.
4. Hair loss: in rare cases, certain supplements can cause coat changes. Contact your vet if this occurs.
5. Muscle weakness: excessive supplementation can lead to muscle weakness. Dosage matters, and more is not always better.

Natural dietary supplements for dogs

Several well-studied natural ingredients are worth knowing about:

• Glucosamine: a natural substance found in joint cartilage. As dogs age, their bodies produce less of it, leading to stiff joints and discomfort. Supplementing with glucosamine can help support joint health and mobility [1].
• Fish oil: a rich source of omega-3 fatty acids (EPA and DHA). These fatty acids reduce inflammation, support a healthy coat and skin, and have documented benefits for dogs with osteoarthritis [2].
• Antioxidants: help neutralise harmful free radicals that can cause oxidative stress and cell damage. Vitamins C and E are among the most commonly used antioxidants in dog supplements.
• Probiotics: beneficial bacteria that support a balanced gut microbiome. Clinical studies show that probiotic supplementation in dogs can improve digestive function and reduce diarrhoea frequency [3].

The importance of healthy digestion in dogs

Good digestion allows your dog's body to absorb and use nutrients from their food effectively. When the digestive system is compromised, even a high-quality diet can fail to deliver its full nutritional value. Key reasons why digestion matters:

1. Nutrient absorption: a compromised gut may not absorb essential nutrients properly, leading to deficiencies over time regardless of diet quality.
2. Energy levels: healthy digestion converts food into usable energy efficiently. Dogs with digestive issues often show reduced energy and vitality.
3. Weight management: efficient digestion supports healthy metabolism and helps maintain appropriate body weight.
4. Immune function: a significant portion of the immune system is concentrated in the gut. A healthy gut microbiome supports immune resilience and reduces susceptibility to infection and allergy.

Dietary supplements for a healthy digestive system in dogs

Several supplement types can support digestive health in dogs:

1. Probiotics: beneficial bacteria that help maintain balanced gut flora, particularly after antibiotics, illness, or periods of stress [3].
2. Prebiotics: dietary fibres that feed beneficial gut bacteria, supporting their growth and activity, which in turn improves digestion and nutrient absorption.
3. Enzymes: digestive enzymes facilitate the breakdown of proteins, carbohydrates, and fats into smaller, absorbable components.

Natural calming aids for stressed dogs

For dogs prone to anxiety (during travel, loud events, or routine changes), natural approaches can help alongside behavioural training.

1. Herbs: chamomile, valerian, and passionflower have been used to support relaxation in dogs. They can be given in capsule or tincture form. Dosage should be guided by your vet, as appropriate amounts vary by dog size and health status.
2. Dietary supplements: L-theanine (an amino acid from green tea) and tryptophan are two ingredients with evidence behind them. L-theanine has been shown to reduce anxiety-related behaviour in dogs in controlled trials [4], and tryptophan acts as a precursor to serotonin, a neurotransmitter involved in mood regulation [4].
3. Essential oils: lavender and chamomile are sometimes used aromatically to create a calming environment. Use with caution. Many essential oils are toxic to dogs if applied to skin or ingested, even in small amounts. Never use essential oils on or near your dog without explicit veterinary guidance.

Dietary supplements for your dog's healthy skin and coat

Dull coat, dry skin, or excessive shedding can indicate a nutritional gap. Key nutrients that support skin and coat health include:

• Omega-3 fatty acids: EPA and DHA reduce skin inflammation, relieve itching, and promote a healthy coat [2]. They must be supplemented through diet since dogs cannot synthesise them in sufficient quantities.
• Biotin: a B-vitamin (vitamin H) that supports cell growth, strengthens hair follicles, and improves coat texture. May also help reduce brittle nails and hair loss.
• Zinc: involved in collagen production, wound healing, and skin barrier function. A zinc deficiency in dogs can manifest as dry, flaky skin and coat deterioration.
• Vitamin E: an antioxidant that protects skin cells from oxidative damage and supports coat quality by reducing dryness and flakiness.

The role of vitamin supplements in your dog's diet

Vitamin A supports skin and coat health, vision, and immune function. B vitamins (B1 through B12) are essential for metabolism and a healthy nervous system. Vitamin C supports immune function and collagen synthesis, important for joints, skin, and connective tissue. Vitamin D aids calcium and phosphorus absorption, which are critical for bone development and maintenance. Vitamin E is a key antioxidant protecting cells from oxidative damage and supporting skin, coat, and immune health.

The importance of mineral supplements for dogs

Several minerals are essential for a dog's health:

• Calcium is vital for bone and teeth development, particularly in growing puppies.
• Phosphorus works with calcium to support bone and teeth health, and is involved in energy production and DNA formation.
• Potassium is essential for proper muscle function and nerve transmission.
• Magnesium supports muscle and nerve function, heart rate regulation, and immune function.
• Zinc plays a key role in skin health, coat condition, wound healing, and immune defence.

Supplements for weight management in dogs

Unwanted weight gain in dogs can result from overfeeding, insufficient exercise, or underlying health conditions. Some supplements may support weight management as part of a broader approach:

L-carnitine is an amino acid involved in transporting fatty acids into cells for energy production. Some veterinary nutrition studies suggest it may support healthy body composition when combined with an appropriate diet and exercise.

Dietary fibre (from psyllium husk, pumpkin, or similar sources) helps dogs feel satiated, reducing the likelihood of overeating. It also supports healthy digestion and bowel regularity.

Weight management supplements are not a substitute for dietary adjustment and appropriate exercise. If your dog is overweight, consult your vet before adding supplements, as the root cause needs to be addressed first.