Vitamins for cats: What you absolutely need to know
Why Vitamins Are Important for Cats
Vitamins control and regulate vital functions in your cat's body, such as metabolism, growth, immune defense and cell renewal. Since cats cannot produce many vitamins themselves, they must absorb them through food.
But be careful❗: Cats have different nutritional needs than humans. For example, they can produce vitamin C themselves, while humans have to get it from their diet. At the same time, cats need vitamin A from animal sources because they cannot use plant-based beta-carotene.
Vitamins for Cats at a Glance
Vitamins are divided into two main categories:
Fat-soluble vitamins
These vitamins (A, D, E, K) are stored in the body, mainly in the liver and fatty tissue. However, excess can be toxic because the body breaks them down slowly.
- Vitamin A : Important for eyes, skin and immune system.
- Vitamin D : Essential for bones and teeth as it regulates calcium absorption.
- Vitamin E : Antioxidant that protects cells and strengthens the immune system.
- Vitamin K : Necessary for blood clotting and wound healing.

Water-soluble vitamins
These vitamins (e.g. the B vitamins and vitamin C) cannot be stored in the body and must be consumed regularly through food. Any excess is excreted in the urine, which reduces the risk of overdose.
- B vitamins : Support metabolism, the nervous system and energy production.
- Vitamin C : Cats can produce it themselves and therefore do not need additional sources.
The Most Important Vitamins for Cats
Fat-soluble vitamins
Vitamin A (retinol)
- Function : Supports vision, skin health and the immune system.
- Sources : liver, kidney, eggs, high-quality wet food.
- Deficiency symptoms : night blindness, skin problems, weakened immune system.
- Caution : Too much vitamin A can cause poisoning, especially if excessive liver feeding occurs.
vitamin D
- Function : Regulates calcium and phosphorus levels and promotes strong bones and teeth.
- Sources : fish (e.g. salmon), egg yolk, fortified food.
- Deficiency symptoms : rickets, weak bones, tooth loss.
- Caution : Cats can synthesize small amounts of vitamin D in sunlight, but this is not enough. They are dependent on the supply from food, e.g. high-quality ready-made food.
vitamin E
- Function : Protects cells from oxidative stress, supports the immune system.
- Sources : vegetable oils (e.g. wheat germ oil), nuts, seeds, animal products.
- Deficiency symptoms : muscle weakness, fertility problems, anemia.
vitamin K
- Function : Important for blood clotting.
- Sources : leafy vegetables, liver, animal products.
- Deficiency symptoms : tendency to bleed, delayed wound healing.
Water-soluble vitamins
B complex (B1, B6, B12, etc.)
- Function : Supports energy metabolism, the nervous system and blood formation.
- Sources : meat, eggs, cereal products, vegetables.
- Deficiency symptoms : loss of appetite, weight loss, neurological problems.
vitamin C
- Function : Antioxidant that strengthens the immune system and protects cells.
- Special feature : Cats can synthesize vitamin C in their liver, which is why they do not need external sources.

Differences between humans and cats: What you need to know
- Vitamin A : Humans can convert beta-carotene from vegetables (e.g. carrots) into vitamin A, but cats cannot. They need vitamin A directly from animal sources.
- Vitamin C : While humans need to get vitamin C from fruits and vegetables, cats' livers produce enough of it.
How do you provide your cat with vitamins?
Natural sources in feed
- High-quality cat food : Many premium brands already contain a balanced mix of vitamins.
- Fresh meat and fish : Provides natural vitamins such as B complex, A and D. 👉 Find out more about it in our article. [Taurine for cats: Essential amino acids at a glance]
- Eggs and oils : Good sources of vitamins A, D and E.
- Snacks with a high meat content : RumbleBox's freeze-dried snacks made from pure meat are not only a delicious reward, but also provide natural vitamins such as B complex and A - ideal for in-between meals.
In certain cases, such as pregnant cats, older animals or after illnesses, the need for vitamins may increase. However, vitamin supplements should only be given after consulting a veterinarian, as an overdose can be dangerous.

How to keep your cat healthy
The right supply of vitamins is essential for your cat's health. A balanced diet with natural sources is the best way to avoid deficiencies. ❤️
Thank you for reading this far – it really means a lot to us! We hope you found something useful and maybe your cat is already looking forward to a little something extra. See you soon and lots of purrs!
By the way
Many cat owners pay close attention to the ingredients in their cat's main food , but often forget about treats .
Snacks often contain sugar, grains and artificial additives that can be harmful to health in the long run.
Anyone who truly wants to feed their cat a completely healthy diet should also rely on natural ingredients here:
Hypoallergenic treats without additives – naturally from RumbleBox. Perfect as a reward, during training, or simply as a snack.
Over 2,500 cats have already switched to healthy snacks!
💚
Schleck & Snack Taster Box for Carnivores
composition
Description
Schleck & Snack Try-Out Box: THE PERFECT START FOR NEW CAT PARENTS
Our Try-Out Box was specially developed for first-time buyers: It contains 3 delicious Schleckies flavors (2 pouches each) as well as 1 pouch of Chicken Breast and 1 pouch of Chicken Cubes as freeze-dried snacks.
This combination brings together our most popular products and covers all important everyday situations – whether as a reward, for training, to help with medication administration, or to boost appetite. Perfect for finding out what your cat truly loves.
WHY THIS TRY-OUT BOX IS PERFECT FOR GETTING STARTED
- Popular bestsellers combined: Schleckies + freeze-dried snacks in one box – ideal for testing different textures and flavors.
- Suitable for all everyday situations: Whether it's a daily reward, training, or a food topping – everything in one box.
- Natural & healthy: No sugar, grains, artificial colors, or preservatives – only high-quality ingredients.
- High acceptance: Perfect for picky cats thanks to the creamy texture and intense meat flavor.
- Ideal for first-time buyers: Get to know our most popular products and find your cat's favorite.
THE PRODUCTS IN DETAIL
1. Schleckies (3 flavors - Chicken, Tuna, Salmon, 2 pouches each) – Creamy indulgence for every day
Our Schleckies consist of a high meat content and are particularly fine and creamy. Enriched with important nutrients like taurine, they support your cat's well-being.
- Premium quality: High-quality meat with up to 70% meat content and over 12% crude protein – for the highest standard in creamy snacks.
- No additives: No sugar, no grains, no binders, no artificial colors or preservatives – only natural ingredients.
- Nutrient-rich: Fresh eggs, fish oil, and taurine promote eyesight, a shiny coat, and a strong immune system.
- Tender texture: A gentle high-speed grinding process (up to 210,000 rpm) creates a particularly fine and creamy consistency.
- Diverse options: Whether chicken, salmon, or tuna – the Ultimate Sparbox offers variety and enjoyment.
2. Freeze-dried Chicken Breast – 100% pure meat
Our chicken breast is gently freeze-dried to preserve nutrients and natural flavor. A high-quality snack for health-conscious cat owners.
- 100% natural: Pure meat without additives
- Rich in protein: Supports muscles and vitality
- Ideal as a reward: Particularly aromatic and popular
- Well-tolerated: Also suitable for sensitive cats
3. Freeze-dried Chicken Cubes – Perfect for Training & Rewards
The small cubes are ideal for frequent, small rewards in everyday life – e.g., during training or for positive reinforcement.
- Practical size: Perfect for training and quick rewards
- Intense flavor: Promotes attention and motivation
- Versatile use: As a snack, topping, or on the go
- Pure recipe: No grains, sugar, or additives
PERFECT FOR THESE EVERYDAY SITUATIONS
- Daily reward: For good behavior or small successes
- Training & education: Playfully supports positive behavior
- Medication administration: Less stress through tasty distraction
- Appetite stimulation: Ideal for picky cats or when they have little hunger
- Strengthening the bond: More shared moments with your cat