Allergy or intolerance? They are not the same thing. Here's how to tell them apart, which tests help with which question, and what to do next.

Tired of guessing what's wrong? See how testing plus personalised nutrition and support works at FIT, and what it's looked like for real clients.

IgG or IgE? Two blood tests, two different antibodies, very different uses. Here's what each can tell you, and how to choose your next step.

Bloated an hour after a latte? It might be lactose, a milk protein or a true allergy. Here's how to tell them apart, and what to do next.

Bloating, migraines and food reactions before your period? Your hormones affect your gut, skin and brain. Here's why, and what actually helps.

Could late nights be lowering your testosterone? What the research does and doesn't show, plus the sleep apnoea signs worth checking early.

Dieting, training and the belly still won't budge? Insulin, blood sugar and testosterone could be keeping you stuck. Here's how to break the loop.

Tired, irritable and put it down to your age? The 'male menopause' label is shaky, but the symptoms are real. Here's what else to check first.

Tired, flat and not in the mood? Before you blame your testosterone, here's what else it could be, when to test properly and why timing matters.

UK winter sunlight isn't enough for reliable vitamin D. Discover who's at risk, when to test, and why 400 IU may prevent deficiency without correcting it.

Histamine intolerance and MCAS can both cause flushing, headaches and gut symptoms, but they're not the same. Here's how to tell the patterns apart.

High cholesterol and raised glucose can be silent. Discover how a Health MOT builds your baseline and turns bloodwork into meaningful action.

Burnout and perimenopause can both cause exhaustion, brain fog, anxiety and poor sleep. Here's how to tell them apart, and why they often overlap.

Recurring tummy aches can make parents suspect food intolerance, but symptoms alone can't tell you the cause. Here's how to investigate safely without harming growth.

Bloating after bread doesn't mean gluten intolerance. Learn how coeliac disease, gluten sensitivity, wheat allergy and IBS differ, and why testing must come first.

Still taking Buscopan, omeprazole or peppermint oil but symptoms keep returning? Here's what treatment failure may really mean, and the safest next step.

Protein gets all the attention, but fibre is the nutrient most people fall short on. Five simple ways to close the gap and support your gut, energy and health.

Discover the symptoms of low testosterone in women, why free testosterone matters, and how hormone testing can help identify the root cause.

Gut dysbiosis could be driving your bloating, food intolerances, skin issues and hormone symptoms. Learn the causes, signs and how to test and restore balance.

Struggling to lose weight despite eating well and training? Discover how thyroid function affects metabolism, the best thyroid tests UK, and how to support it.