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Mind and Body

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Check your levels of vitamin B9, B12, iron, and vitamin D, which have been scientifically proven to play a role in supporting good mental health.
What's included
your discount will be applied at checkout

Why Take The
Mind & Body Test?

Getting the right nutrients from your diet is vital for your physical health, but it is just as important for your mental health too.

Being deficient in some nutrients can affect the production of hormones and chemical messengers in the body which can affect mood and sleep and even lead to mental health issues.

So, by measuring the levels of these key biomarkers using our mind and body blood test, you’ll gain a deeper understanding of how your diet is working to support your mental health. It will help you identify areas which may require improvement so you can take action to boost your intake of nutrient-rich foods or introduce supplementation.

IRON & Mental Health

Iron is an important mineral for many aspects of your health, especially the proper formation of your red blood cells.

Iron is needed for the brain and nervous system, too. Without enough iron, it can make sending messages around the body difficult, causing neurological problems.

Some of the symptoms of iron deficiency anaemia include depression and cognitive disorders.

Research indicates that people with psychological issues also have low levels of iron. Iron deficiency can increase anxiety and change the way that we behave.

Our mind and body test check your iron and ferritin levels. Ferritin is the main storage protein for iron in the human body.

So, knowing your levels will accurately tell you how much iron is stored in your body, enabling any deficiency to be identified.

Vitamins & Mental Health

Vitamin B12
& B9 (Folate)

A lack of B vitamins in the diet is associated with poor mental health, particularly depression. The link between deficiency and depression isn’t fully understood but research has shown that reduced vitamin B12 levels are associated with an increased prevalence of the condition.

One theory is that vitamin B12 affects serotonin levels in the brain. Serotonin is a hormone associated with regulating mood and B12 is involved in its production. Therefore, vitamin B12 deficiency can result in changes to mood, sleep, and emotions.

Folate deficiency has also been linked to depressive disorders and a folic acid supplement could help improve mood in some depressed patients.

Vitamin D

Vitamin D is essential for many functions within the body and there is research which indicates there is a link between a deficiency in this nutrient and depression.

Researchers have identified that people with depression also have low levels of vitamin D. There is also a link between low levels and premenstrual mood symptoms in women.

In the UK, vitamin D deficiency is common and it is recommended that everyone over the age of one should take a vitamin D supplement.

How Can I Support
My Mental Health?

There are many things you can do to help improve and maintain your mental health. The good news is they’re relatively simple and it shouldn’t take long for you to feel the benefits.


What you eat can have a significant impact on your mental health as well as your physical health. It’s important to eat a diet which is rich in fruit and vegetables because they contain many of the nutrients your body needs to stay healthy and function properly. Importantly, some research shows that people who eat more fruit and vegetables have a greater level of wellbeing. Poor diet is often implicated in poorer mental states in both adults and children. So, it is important to eat a healthy, balanced diet. Research has shown that following a Mediterranean style diet which is high in fruit, veg, nuts, cereals, beans, fish, olive oil and a moderate intake of red meat can lead to a reduction in depressive symptoms.


Being active has a positive impact on the way you are feeling and gives you a tremendous sense of wellbeing. That’s why lots of people exercise regularly. It has been shown to be of positive benefit to anxiety, stress, depression and even conditions such as ADHD. Exercise boosts your mood and can also help you sleep better. Some of the mental benefits of exercise include:

  • increased self-esteem
  • increased energy
  • better sleep
  • sharper memory
  • clearer thinking ability
  • reducing the impact of stress
  • boost your immune system

Stay Socially Connected

Busy lives mean it can sometimes be difficult to connect with friends and family. However the emotional support we receive from our friends and family is vitally important for our wellbeing. So make sure you put aside time to stay connected.

improve your unique self

Want to improve your health & wellbeing? Forth gives you insight into your body’s key biomarkers. By tracking essential markers overtime you can build a picture of your own unique self and discover how your body responds to the changes you make so you can reach your personal best.

Frequently asked questions

 Here are some of the most frequently asked questions. If you need anything else try our help section.

  • How does a lack of iron effect mental health?

    According to Psychology Today, the symptoms of iron deficiency can include anxiety, depression, irritability along with poor concentration.

    Studies have shown that anxiety-driven behaviour can be linked to low iron levels.

  • What role does vitamin B12 and B9 play in mental wellbeing?

    Vitamin B12, along with other B vitamins such as folate (B9) plays an important role within the brain.

    Vitamin B12 plays a key role in several physiological functions. It is needed to help the development of red blood cells and if it is not present then this can lead to pernicious anaemia which can have neurological side effects.

    Pernicious anaemia is a deficiency in red blood cells due to a lack of vitamin B12.

    Vitamin B12 deficiency is known to present with symptoms that include depression and anxiety.

  • How does vitamin D help with depression?

    Studies have made connections between vitamin D and depression, including a study that identified vitamin D receptors in the same area of the brain that is associated with depression.

    Our studies have found that everyone in the UK is at a greater risk of vitamin D deficiency, particularly during winter months.

  • What are the symptoms of depression?

    Depression can manifest in different ways in people but is generally characterised by a continued period of low mood and feeling sad and a loss of interest in things you usually enjoy.

    The length of time these symptoms last varies from a few weeks to months and can disrupt your personal, work, and social life as well as your relationships.

    Symptoms of depression include:

    • continually feeling sad
    • low self-esteem
    • feeling hopeless
    • feeling anxious or worried
    • feeling irritable
    • tearful
    • guilt-ridden
    • suicidal thoughts or feeling like you want to harm yourself

    Depression can also cause physical symptoms such as:

    • appetite changes
    • weight changes
    • low energy
    • unexplained aches and pains
    • constipation
    • low sex drive
    • disrupted sleep
    • menstrual cycle changes

    If you or someone you know is displaying signs of depression it’s important to get help.  The NHS advises that if you or someone you know is experiencing symptoms of depression for most of the day, every day for more than 2 weeks they should seek advice from their GP.

    For more information and support visit

  • What are the symptoms of anxiety?

    There are many different forms of anxiety, from General Anxiety Disorder, OCD, Panic Disorder, Health Anxiety, PTSD, and Social Anxiety Disorder to name a few.

    Anxiety can also vary in severity, but some of the common symptoms of anxiety are:

    • Feeling fearful
    • Sense of dread
    • Poor concentration
    • Constant worry
    • Feeling on edge or restless
    • Irritability and short-tempered

    The physical symptoms of anxiety include:

    • Shaking or trembling
    • Feeling sick
    • Upset stomach
    • Fast heart rate
    • Sweating
    • Shortness of breath
    • Dizziness
    • Tiredness
    • Muscle aches and tension
    • Pins and needles
    • Headaches
    • Not being able to sleep or sleeping too much
    • Loss of appetite

    If you or someone you know is struggling with anxiety it’s important to get help. Seek advice and support from your GP. Learn more by visiting

Upgrade your test

All our tests are designed by our expert team of scientists who have taken the latest research to bring you the most relevant biomarkers to improve your health. Here are some alternative tests that cover essential biomarkers.

Baseline Plus
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46 Biomarkers Included
Our best value wellbeing check measuring over 45 biomarkers.
Looking for a bespoke test?

Want to add more biomarkers to your test? That’s no problem. All of our tests can be personalised.  Just use our ‘customise this test’ button below to see the list of biomarkers which you can add to your test and get analysed at the same time.