A simple blood test can check for many of these hidden causes—so you don’t have to keep guessing why you’re tired. From iron and B12 to thyroid and cortisol, it’s the first step to understanding your body and boosting your energy naturally.
Unexplained Tiredness or Fatigue
Persistent tiredness can be caused by a variety of factors—low iron, vitamin deficiencies, thyroid imbalances, or even dehydration. A blood test can help pinpoint the root cause.
Check Your Fitness Levels
Monitoring key health markers like iron, vitamin B12, testosterone, cortisol, and inflammation levels gives insight into how your body is performing and recovering—perfect for athletes or anyone starting a new fitness journey.
Optimise Your Energy & Performance
With a simple blood test, you can track your progress, identify nutritional gaps, and make informed decisions about diet, supplements, and training routines.
“Getting tested is quick and easy. Choose your test online, visit a clinic or opt for a home testing kit,
and receive your results with a healthcare proffessional-reviewed report—often within 24–48 hours.”
Whether you’re constantly tired, struggling to recover after workouts, or just not feeling like yourself, your blood might hold the answers. Our targeted blood tests are designed to uncover what’s going on inside your body—so you can take control of your health and feel your best
This test measures Iron, Ferritin and UIBC levels. Iron is important in making red blood cells, which carry oxygen around the body. If you know ou have low itron levels it is a small test easily able to repeat regulary to monitor your current levels
analyzing critical health markers like Vitamin B12 and Vitamin D3, this test helps you assess your energy levels, immune function, and bone strength. It also evaluates Iron levels, which are vital for oxygen circulation needed for peak performance.
8 Essential Markers for Nutritional insight, including and Iron Profile vitamins D B12 Aand folate, with magnesium to help view energy levels, immune function and bone strength.
Checking your Health Biomarkers with a blood test is essential to see key areas of health, hormones and nutrition inside you body,
Iron & Ferritin
Iron is essential for carrying oxygen in your blood—low levels can leave you feeling weak, breathless, and constantly tired.
Vitamin B12 & Folate
These vitamins support red blood cell production and nervous system health, helping to maintain energy levels and mental clarity.
Vitamin D
Vital for bone strength, immune function, and overall mood—low levels are often linked to fatigue and feeling run down.
Thyroid Function
Your thyroid controls your metabolism; if it’s underactive, it can slow everything down—leading to low energy, weight gain, and feeling cold or sluggish.
Testosterone
Important for muscle mass, stamina, mood, and libido—low testosterone can make you feel drained and unmotivated.
Cortisol
Known as the “stress hormone,” cortisol affects energy levels, sleep, and how well your body recovers from physical and mental strain.
Full Blood Count (FBC)
Gives a comprehensive picture of your overall health by checking red and white blood cells and can detect signs of anemia, infection, or inflammation.
If you’re constantly feeling drained, lightheaded, or out of breath—even after a full night’s sleep—you could be dealing with anemia. It’s one of the most common causes of persistent fatigue and low energy.
Anemia happens when your body doesn’t have enough healthy red blood cells to carry oxygen to your tissues. Without enough oxygen, your muscles, brain, and organs can’t perform at their best—which is why you feel tired all the time.
Ongoing tiredness or weakness
Shortness of breath
Dizziness or lightheadedness
Pale or yellowish skin
Fast or irregular heartbeat
Headaches or trouble concentrating
The most common type is iron-deficiency anemia, which can result from not getting enough iron in your diet, blood loss, or an issue with absorption. Low vitamin B12 or folate can also lead to other types of anemia
The Competitive Athlete Test: Designed for athletes and professionals but it’s perfect for everyday people too.
It offers a comprehensive health overview—think of it as an MOT for your body to ensure everything is running smoothly.
With over 50 Biomarkers in all elements of Health, Hormones and Vitamins.
Vitamin D
Supports muscle function, immune health, and energy levels. Deficiency is common and linked to fatigue and poor performance.
Iron (Ferritin)
Crucial for oxygen transport in the blood. Low levels can cause tiredness, weakness, and decreased endurance.
Vitamin B12 & Folate
Essential for red blood cell production, energy metabolism, and nervous system function.
Testosterone (in both men & women)
Influences muscle mass, recovery, strength, and overall energy. Imbalances can reduce performance and motivation.
Thyroid Hormones (TSH, Free T3, Free T4)
Regulate metabolism. Imbalances can cause fatigue, weight changes, and sluggishness.
Cortisol
The stress hormone. Chronically high or low levels can impact recovery, sleep, and fat storage.
Insulin & Fasting Glucose
Reflect how efficiently your body uses energy. Poor regulation can lead to crashes, fatigue, and weight gain.
Creatine Kinase (CK)
Indicates muscle stress or damage. Useful for understanding recovery needs, especially after intense training.
C-Reactive Protein (CRP or hs-CRP)
Measures inflammation. Chronic inflammation can impair recovery and performance.
Electrolytes (Sodium, Potassium, Magnesium)
Essential for hydration, muscle contraction, and energy production
Youth Revisited makes it their goal to offer a professional discreet and speedy service to all customers at all times.
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