Blood tests only get done when something feels seriously wrong.
Here’s the thing – that’s a missed opportunity.
Blood tells a story on so much more than disease. Even before symptoms show up, blood markers can point to gut inflammation, hidden nutrient depletion, overactive immune responses and more. A few simple indicators can paint an impressively clear picture of what’s going on behind the scenes.
And guess what?
With private blood tests being easier (and cheaper) than ever, there’s no reason to wait around for a GP appointment or specialist referral to check these markers. For quick and reliable results, look no further than One Day Tests – covering everything from gut health markers to inflammation and nutritional status.
But what do those results actually mean?
Let’s take a look.
Here’s what we’re covering:
- Gut Health Clues Found In Blood
- The 5 Markers You Need To Know
- The Simple Science Behind Inflammation Tests
- Early Depletion: Nutrients Blood Tests Can Detect
- How To Use Your Results To Look Even Better
Gut Health Clues Found In Blood
Did you know…
2 out of 3 adults experience gastrointestinal symptoms like gas, bloating, abdominal pain, reflux or discomfort every month.
But only 5% will seek answers for those symptoms from a doctor.
They suffer in silence, reaching for the creams and digestive supplements instead of answers. Digestive health is rarely considered — until it’s too late.
Until blood tests are done.
Because when the gut is struggling, it shows up there too. Inflammation sends markers surging. Nutrients plummet. Immune messengers go haywire. Blood contains all these clues, sometimes years before there are any symptoms to show for it.
Scientists at Francis Crick Institute discovered biomarkers they could trace back 8 years prior to patients developing ulcerative colitis and Crohn’s disease.
Eight years!
There’s a window of time most people never utilise. Why?
Simple. Because they never knew they could look.
Which Markers Should You Track?
There are lots of markers that can help build a bigger picture of gut health. Here are five of the biggest:
- C-Reactive Protein (CRP) – Produced by the liver and released into the blood when there’s inflammation in the body. Raised CRP levels are one of the best indicators that something is causing your immune system to react – often pointing to issues in the gut first.
- Full Blood Count (FBC) – Measures white blood cells, red blood cells and haemoglobin. Chronic illnesses like IBD and Coeliac cause anaemia and raised white cell counts that can be detected here.
- Iron, Ferritin & B12 Levels – Key nutrients that pass through gut lining and into your bloodstream. When levels low, it often points directly to the compromised gut absorption.
- Vitamin D – When levels are chronically low, this key vitamin is associated with poor gut function and inflammation. It’s also one of the most commonly overlooked additions to standard blood test panels.
- Thyroid Function Tests (TSH) – Surprisingly, gut health and thyroid function are closely connected. Poor gut health can inflame the intestinal lining, interrupting normal hormone conversion. Thyroid function tests should be included in any blood tests focusing on gut health.
Simple, right?
Tracking these markers over time can help create a clearer picture of how well (or not) the gut is functioning behind the scenes.
The Simple Science Behind Inflammation Tests
Inflammation is a protective reaction.
Imagine you eat something your gut doesn’t like. It could be a food intolerance. Or maybe bacteria got through for some reason. Whatever it is – the body flags it as unwanted, sending immune cells to the rescue.
And where do those immune cells come from?
Your blood.
That’s why CRP blood tests and ESR tests are useful, even though they don’t measure inflammation in the gut directly. They measure markers released in response to inflammation. Chronic imbalance in the gut causes elevated levels of these markers over time.
Except… it doesn’t always feel like ‘something’ is wrong.
That’s the kicker.
Just because you don’t feel sick doesn’t mean there isn’t inflammation in the gut causing problems. An overactive immune response can linger for years, causing widespread inflammation without so much as a symptom that people feel needs medical attention.
Blood tests are one of the only ways to keep an eye on silent inflammation before it causes bigger problems.
Nutrients Blood Tests Can Detect
The gut is your nutrient gatekeeper.
If it’s damaged in any way – also known as leaky gut or increased intestinal permeability – it doesn’t matter how well you eat. You won’t be absorbing nutrients at optimal levels.
That’s when blood tests can help reveal suspect nutrient levels.
Common signs of poor nutrient absorption include tiredness, brain fog, low mood, low immunity and more. Of course, these are things we all blame on stress and poor sleep.
But when dug into with a blood test, the first nutrients to show low are often:
- Iron & ferritin
- Vitamin B12
- Vitamin D
- Folate
Pretty much every nutrient depletion related to poor gut function shows up in blood tests first.
Are You Actively Using Your Blood Test Results?
It’s all fine and dandy knowing which markers to look out for. But what do you do when you get the results back? How can you actually use them to your advantage?
It might feel counterintuitive, but the goal isn’t to search for a diagnosis. Instead, use blood tests as your personal health baseline – and watch how your numbers change when you implement healthy habits for life.
Here’s how:
- Invest in a baseline. Don’t just test one thing when you send off your blood sample. A single marker can say little without any other context. Test CRP, FBC, Iron, B12, Vitamin D, thyroid function. Create a baseline to work from.
- Test more than once. One weird result doesn’t mean anything. Take several readings over time to work out what’s normal for you. Then, adjust your habits and retest.
- Connect the dots. Tired all the time plus low ferritin? Low energy and low B12? Use the results to decipher just what might be causing your symptoms – before speaking with a doctor.
- Retest after lifestyle changes. Trying a new diet, supplement regimen or want to reduce stress? Retest in three months to see if those numbers go back to normal.
Taking a careful approach to blood results is the best way to use a GP appointment as effectively as possible. Don’t leave with more questions. Leave with answers.
Before You Close This Tab: Blood Tests Are Your Friend
Blood tests are seriously underrated when it comes to managing everyday health.
They allow you to see screaming red flags that your gut isn’t functioning properly long before you ever need a diagnosis. Inflammation markers. Early nutrient depletion. It’s all there. If you know what you’re looking for.
Thankfully, private blood tests are more affordable than ever. Doing your own research now can save you a long, frustrating journey through doctors appointments and internet diagnoses down the road.
The hardest part is already done. Namely, paying attention to your health in the first place.
