Frequently asked.

A UK food and health diary on iPhone. Calorie counter, ingredient scanner, reaction diary, workout log, fasting timer and AI coach, all sharing the same diary. Independent. Built in the UK.

Any UK barcode in the underlying food databases. In practice that covers branded products and own-brand packs from Tesco, Sainsbury's, Asda, Morrisons, Aldi, Lidl, Co-op and Waitrose. If a pack doesn't scan, tap "report this food" so we can add it.

Yes. NutraSafe is an iPhone app, iOS 17 and later. Apple Watch optional. Android is in development but not the current public surface.

Searching the food database needs an internet connection. Foods you've already logged stay in your diary and can be viewed offline.

Something added to food during manufacturing to preserve it, change its texture, add colour or flavour, or stop it separating. In the UK and EU each approved one carries an E-number. Preservatives, colours, sweeteners, emulsifiers and flavour enhancers are the main groups.

Codes for additives reviewed for use in the UK and EU. E100s are colours, E200s preservatives, E300s antioxidants, E400s thickeners and emulsifiers, E600s flavour enhancers, E900s include sweeteners. E300 is vitamin C. E322 is lecithin. Our E-number library covers each one in plain English.

The Southampton Six artificial colours (E102, E104, E110, E122, E124, E129) are linked to hyperactivity in some children and UK packs carrying them must show an FSA warning. Sulphites (E220 to E228) can trigger reactions in people with asthma. Sodium nitrite (E250) cures ham and bacon: regular processed-meat eating is linked to bowel cancer, and the NHS caps processed meat at 70g a day.

UK law requires 14 allergens to be declared: celery, cereals containing gluten (wheat, rye, barley, oats), crustaceans, eggs, fish, lupin, milk, molluscs, mustard, peanuts, sesame, soybeans, sulphur dioxide and sulphites above 10ppm, and tree nuts (almonds, hazelnuts, walnuts, cashews, pecans, brazils, pistachios, macadamias). NutraSafe flags these in the ingredient list it reads back.

NOVA 4: industrial formulations with ingredients you wouldn't find in a home kitchen (emulsifiers, humectants, flavour enhancers, modified starches, colours). Soft drinks, packaged snacks, mass-produced bread, ready meals, chicken nuggets. NutraSafe tags each food by processing level and tracks the trend.

Ingredients are listed by weight, biggest first. Allergens are in bold. The nutrition panel shows energy, fat, saturates, carbohydrates, sugars, protein and salt per 100g and usually per serving. Front-of-pack traffic lights show fat, saturates, sugars and salt as red, amber or green. Compare two products on per 100g (serving sizes differ).

The three nutrients your body needs in large amounts: protein (4kcal/g), carbohydrates (4kcal/g), fat (9kcal/g). NutraSafe logs each macro per food and totals them across your day.

Depends on age, sex, weight, height and activity. The NHS rough guide is around 2,000kcal a day for women and 2,500kcal for men to maintain weight. A TDEE calculator personalises that. We log what you eat so you can see the trend; we don't write personalised diet plans.

14 vitamins and 13 minerals, against the UK NRV. The diary updates in real time as you log, so you can see where you're running short across the day, week and month. Vitamin D is the one most adults in the UK are advised to supplement in winter.

An allergy involves the immune system. Symptoms appear quickly (minutes to hours): hives, swelling, breathing difficulties, anaphylaxis at the severe end. An intolerance is non-immune. Symptoms are usually digestive (bloating, cramps, loose stools) and build up more slowly. Diagnosis for both routes through your GP.

Keep a food and symptom diary for a few weeks. Note what you ate, when, and how you felt afterwards. Home intolerance tests are mostly unreliable. The NHS route is to take your diary to your GP, who can refer you to a registered dietitian. NutraSafe's reaction tracker (free, capped at 5 entries) gives you something solid to take in.

Eating cycles with longer breaks between meals. 16:8 means a 16-hour fast and an 8-hour eating window. 5:2 means eating normally five days a week and restricting calories on two. Water, black coffee and plain tea during fasts. NutraSafe's fasting timer (Pro) covers the common protocols and a custom window. Talk to your GP first if you're pregnant, on diabetes medication, under 18, or have a history of disordered eating.