What you take matters.
Know why.

Welcome — we're really glad you found your way to VitaWhat.

If you're here, chances are you have a question that matters to you. Maybe something feels off and you want to understand why. Maybe a food keeps disagreeing with you and you are trying to work out what. Or maybe you are simply curious about the remarkable machine you live in every single day. Whatever brought you, you are in the right place — because VitaWhat exists for one reason: to help you understand your own body in plain, honest English, without the jargon, the scare tactics or the sales pitch.

Getting to the root of the problem

So much health information stops at the symptom. You feel tired, your skin breaks out, or your nails keep splitting, and the internet hands you a hundred possible answers with no way to tell them apart. We take a different approach. Start with our guide to common deficiencies, where each entry sets out not just the signs but the likely causes, who is most at risk, the foods that help, and — crucially — when a symptom is a reason to get a blood test rather than a diagnosis you can make at home. From there you can dig into the individual vitamins and minerals themselves: what each one actually does in the body, how much you need, where to find it in food, and what happens when you get too little or too much.

Because symptoms are so often non-specific — the same tiredness can point to low iron, low vitamin B12, poor sleep or a dozen other things — we have built a tool to help you think it through visually. Our interactive 3D body locator lets you rotate a male or female figure and see exactly where a deficiency tends to show up, on the surface and deep inside. It will not diagnose you, but it will help you connect what you are feeling to what might be behind it, so you can ask sharper questions when it counts.

Working out what is causing an allergy

If you are trying to pin down what is triggering a reaction, we know how frustrating and worrying that can be. Our A–Z of allergies is a searchable reference to hundreds of allergens and triggers, each one explaining the typical symptoms, how quickly a reaction can start, how severe it can become, and the practical steps for avoiding it. Just as importantly, every allergy page is clear about the difference between a true allergy and an intolerance, spells out the warning signs of a serious reaction, and tells you when it is time to see a specialist rather than keep guessing.

Reactions do not always come from the obvious foods, either. Sometimes the culprit is an additive rather than an ingredient, which is why we have documented the E numbers — what each additive is, how it is made, and the reactions some people report — so you can read a label and actually understand it. And if you are exploring more natural options, our herbal and botanical guide is honest about the difference between traditional use and proven effect, and flags the interactions that matter before you try anything new.

It is all about learning about your body

Underneath everything, VitaWhat is really about one thing: helping you get to know your own body a little better. The more you understand how it works, the more confident and capable you become — in the kitchen, in the pharmacy, and in the doctor's surgery. That is why we go beyond the basics. You can explore your hormones and the quiet ways they shape your mood, sleep and energy; learn what your blood type actually means and how common it is around the world; and even understand what is really in your drinking water. When it comes to food, you can compare cooking oils and butters, milks and meats side by side, and see how everyday fruit and vegetables measure up.

When you want to put it all into practice, our energy and BMI calculator lets you log a day of food and check it against your daily needs, while our longer guides tackle the bigger questions — like when deficiency symptoms really need testing, whether you can take too many vitamins, and how to tell a food allergy apart from an intolerance. Each one is written to be read start to finish, not skimmed and forgotten.

One promise from us: every page is written to be clear, careful and grounded in trusted sources such as the NHS, the NIH and EFSA. We would rather leave a section blank than invent it, and nothing here is a substitute for professional medical advice — it is a way to arrive better informed, ask better questions, and feel more in control. Your body has a lot to tell you. Take your time, follow your curiosity, and let's decode it together.