Vitamins and Minerals for Cats

Vitamins and minerals are just as essential for a cat as protein or fat – without them, the body can't function properly, repair itself, or fight off illness. A healthy cat fed a good-quality complete food has most of its needs covered. There are situations, though, where the body needs extra, targeted support – and that's where vitamin and mineral supplements come in.

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The most common reasons for supplementing vitamins and minerals in cats include:

• Home-cooked or raw feeding – a home-made diet without a professionally balanced recipe can struggle to cover all the micronutrients a cat needs.
• Recovery after illness or surgery – a weakened body has increased requirements for B vitamins, vitamin C and zinc, which support healing and immune recovery.
• Older age – older cats absorb some vitamins and minerals from food less efficiently, particularly B vitamins and vitamin D.
• Seasonal shedding – an increased need for biotin, zinc and omega fatty acids during moulting periods.
• Weakened immunity – cats living indoors without access to sunlight naturally have lower vitamin D levels, which plays a key role in the immune system.

Key vitamins for cats and what they do:

• Vitamin A – essential for healthy eyesight, skin and immunity. Unlike dogs, cats can't synthesise it from beta-carotene – they need to get it directly from animal sources or supplements. Note – vitamin A overdose is toxic in cats.
• B vitamins – support the nervous system, energy metabolism and a healthy coat. Vitamin B1 (thiamine) is essential for cats – a deficiency causes serious neurological problems.
• Vitamin D – regulates calcium and phosphorus absorption, and supports strong bones and teeth. Cats that live exclusively indoors are more prone to deficiency.
• Vitamin E – a powerful antioxidant that protects cells from oxidative stress and supports immunity and healthy skin. Particularly important when feeding a diet higher in fish oil.
• Vitamin C – cats can synthesise this themselves, but targeted supplementation can be beneficial during increased strain on the body, stress, or recovery.

Key minerals for cats and what they do:

• Calcium and phosphorus – the basic building blocks of bones and teeth. Their ratio to each other is crucial – an unbalanced intake can lead to skeletal problems, particularly in growing kittens or cats fed a home-made diet.
• Magnesium – important for proper muscle and nervous system function. Excessive intake, however, increases the risk of urinary stones – caution is needed for cats with urinary tract problems.
• Zinc – supports immunity, wound healing and a healthy skin and coat. Zinc deficiency shows up as a dull coat, flaky skin and lower resistance to infection.
• Iron – essential for producing red blood cells and carrying oxygen. Deficiency shows up as lethargy, weakness and pale mucous membranes.

Practical tips for giving cats vitamins and minerals:

• Always follow the recommended dosage stated on the packaging – fat-soluble vitamins (A, D, E, K) build up in the body, and overdosing can cause serious poisoning.
• If your cat refuses tablets or capsules, try mixing the product into wet food or a treat – many supplements are also available as pastes or drops.
• Vitamin supplements don't replace good-quality food – they're an addition, not a substitute. Always start with the basics and add supplements with a clear purpose.
• When giving several supplements at once, keep track of the total intake of each vitamin and mineral – the combined amount from food and supplements must not exceed safe levels over the long term.
• If you're unsure about the choice or dosage, consult your vet – especially for cats with health problems or those on veterinary medication.

The right vitamins and minerals are a subtle but effective way to give your cat a little extra health every day – whether as prevention, support during a difficult period, or targeted help with a specific problem.