The UK food reaction tracker for energy, mood, gut and skin
Log a meal, then log how you felt afterwards: energy, mood, gut, skin, sleep. Over the weeks the diary joins the dots and shows which ingredients keep coming up before the rough days, so you've got something solid to take to your GP or dietitian. We surface the pattern. They diagnose.
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Log the food, log the feeling, read the pattern
Three steps, and only the first two are on you. Log what you ate, note how you felt, and the diary does the joining up over the weeks that follow.
Log the meal by barcode, name or photo
Every reaction needs a meal behind it, so the first job is the food. Scan a UK barcode, search the database by name, or photograph the plate with AI meal scan for a home-cooked dinner or a takeaway with no label. NutraSafe fills in the ingredients off the pack, so the record is at ingredient level, not just "pasta".
That ingredient detail is the bit that matters later. When the diary looks back for what keeps recurring before your rough days, it is reading the actual ingredients you ate, not a vague meal name. Logging is free for up to 25 foods a day, so you can keep a fortnight's diary without paying a penny.
Log how you felt: energy, mood, gut, skin, sleep
After a meal, note how you felt. Pick a category, pick a severity, add a line if you want. Energy for the flat or wired afternoons, mood for the irritable or low days, gut for bloating, wind and cramping, skin for flare-ups and itching, sleep for the restless nights. It is a couple of taps and it attaches to the exact foods you logged.
The point is a record over time, not a one-off note. Some reactions land within the hour; skin and sleep can lag a meal by a day, which is exactly why a dated log beats memory. The free tier keeps your five most recent reactions so you can see whether tracking is worth it before you decide to pay.
Suspected triggers surface the recurring ingredients
Once you have a few weeks of logs, the suspected-triggers analysis looks back across them. It counts each ingredient's appearances in the two to four hours before a reaction, then compares that with how often the same ingredient shows up on your calm days. An ingredient that keeps turning up before symptoms, and rarely otherwise, rises to the top.
An ingredient you eat every single day, on calm days as often as rough ones, drops down the list, so a food does not get blamed just for being common. The analysis surfaces ingredients worth talking about. It does not call any of them your trigger. The suspected-triggers analysis is a Pro feature; the free tier still logs your reactions.
Take the record to your GP or dietitian
NHS and British Dietetic Association guidance for IBS and suspected food intolerance asks you to keep a food and symptom diary before any elimination diet, because the pattern over time is what a clinician needs to interpret. That diary is exactly what NutraSafe builds while you log, dated, at ingredient level, with the timing of each reaction attached.
When you get your appointment, you turn up with weeks of real data instead of a hazy "I think dairy might do something". We do not diagnose intolerances and we will never tell you to cut a food out. That call belongs to your GP or a registered dietitian; our job is to make the record easy to keep and easy to hand over.
Five kinds of reaction, a few seconds each
Five categories cover almost everything people bring to us. Each entry takes a few seconds. The aim is a record over time, not a one-off note.
Flat, foggy or wired afternoons. The kind of slump that doesn't match the day's sleep or workload.
Irritability, low mood or anxiety that lifts when you change what you've been eating. Worth recording.
Bloating, wind, reflux, cramping, urgency, looseness. The bit GPs ask about first.
Flare-ups, eczema, hives, itching. Patterns can lag the meal by a day, which is why dated logs matter.
Tension, migraine, hangover-style heads after meals that weren't drinks. Logged with severity.
What the reactions screen looks like
A daily check-in, a running weekly summary, and your recent reactions with the meal each one sat behind. This is example data; yours comes from your own logging.
Note how each day went and what you reacted to, and the entries build up over time. Once there are enough, the suspected-triggers analysis under Patterns ranks the ingredients that keep turning up on the rough days. That is the kind of thing worth mentioning to your GP or dietitian. It flags a suspect, not a verdict.
How the suspected-triggers analysis works
Log a reaction in a few seconds: pick the category, pick the severity, add a note if you want. The diary already holds what you ate. After a few weeks the suspected-triggers analysis (Pro) looks back across your logs and shows which ingredients keep coming up.
What the analysis does
The suspected-triggers analysis is a Pro feature. It looks at the window of meals in the two to four hours before each reaction you log, then counts which ingredients recur before the rough days more often than on the calm ones.
It surfaces the ingredients worth talking about. It does not call any of them your trigger. That is a job for your GP or a registered dietitian, and this gives them something solid to start from in a 10-minute slot.
Free and Pro
The free tier keeps your five most recent reactions, so you can see whether tracking is worth it before you pay. Pro is £3.99 per month on iOS and lifts the cap, keeps your full reaction history, and unlocks the suspected-triggers analysis.
NHS and BDA guidance for IBS and suspected food intolerance suggests a 7 to 14 day food and symptom diary, worked over a 2 to 4 week window, before any elimination. Two to four weeks of logs is where the quieter patterns start to show.
More on the food intolerance tracker →
We're the diary, not the diagnosis
NutraSafe doesn't diagnose food intolerances or allergies. We can't and we wouldn't try. Food allergy is diagnosed by skin prick tests, specific IgE blood work or supervised oral food challenges. Most non-coeliac, non-lactose intolerances are worked out through supervised elimination and reintroduction with a registered dietitian.
Our job is to make the underlying record easy to keep and easy to share. The diary is what NHS and BDA guidance asks you to bring to the appointment in the first place. More on the food diary and how logging works →
Food reaction tracker FAQ
The questions that come in from people about to start tracking. Answers sourced to NHS and BDA guidance.
A dated record of what you ate (ideally at ingredient level), when, the symptoms you experienced and their timing. NHS and BDA guidance for IBS and suspected food intolerance recommend a 7 to 14 day food and symptom diary before any elimination, because the patterns over time are what a clinician needs to interpret.
No, and we don't try to. Food allergy is diagnosed by a clinical specialist using skin prick tests, specific IgE blood tests or supervised oral food challenges. Most non-coeliac, non-lactose intolerances are worked out through supervised elimination and reintroduction with a registered dietitian. Our role is to make the underlying record easy to keep and easy to share.
It surfaces correlations across your logged meals and reactions. For example, it might show that you logged a reaction within three hours of eating a particular ingredient four times in the last 30 days. It doesn't call that ingredient your trigger. It surfaces the data your GP, dietitian or registered allergist can interpret in clinical context.
Free covers logging up to 25 foods per day, barcode scanning with the additive flag, and your five most recent reactions. NutraSafe Pro is £3.99/month or £34.99/year on iOS and unlocks full reaction history, the suspected-triggers analysis, allergen warning detail on barcode scans, and processed-food and NRV insights.
UK retail items scan via the barcode straight from supermarket and own-brand catalogues. Pre-packed for direct sale items, such as a sandwich made on site or a salad assembled at the counter, carry a full ingredient list under Natasha's Law (2021), but no barcode, so we provide manual ingredient logging for those. Restaurant meals can be logged at meal level with as much ingredient detail as you have.
Two to four weeks is the typical range. NHS and BDA both frame elimination and reintroduction protocols around a 2 to 4 week observation window. A week is usually too short to spot anything but the clearest triggers; a month covers enough day-to-day variation to surface quieter patterns that a clinician can work from.
Start your food reaction diary today
Free download. Log up to 5 reactions on the free tier. Pro is £3.99/month or £34.99/year for unlimited reactions, the suspected-triggers analysis, and AI Coach.
iPhone · iOS 17 · Cancel any time