In this current world, where wellness advice is easy to come by but hard to corroborate, science is king. It's imperative that any steps we take (or recommend to our loved ones) are backed by hard scientific evidence. And our community knows that science is the backbone of InsideTracker—that's why they've always relied on us to be a guiding voice for health and wellness advice. So we knew that, in this new reality, when so much is changing and so little is clear, we needed to step up. Our goal has always been the same: to provide expert, personalized, scientific recommendations to improve your wellbeing.
We like to think of the immune system as the defense of your body's football team. There are many different positions, each unique and just as important as the other. But the team is only as strong as its weakest player and even a single error can end up costing the game. The good news is that just like a football team, we can train our immune system to become stronger come time for the big game—or the fight of our lives! By using this analogy, we can better visualize how complex our immunity really is.
White blood cells (WBC) are the soldiers of the immune system that search for and fight harmful pathogens. Measuring your WBC count therefore gives a direct look at the state of your immune system. InsideTracker Immunity provides both a total count of WBC as well as the breakdown of specialized cells like lymphocytes, monocytes, neutrophils and others in a complete blood cell count (CBC).
hsCRP
High sensitivity C reactive protein (hsCRP) is a marker of general inflammation in your body. Elevated levels can be indicative of a wide range of states, including disease. While it’s not directly indicative of viral infection, it is used to shed light on the body's overall inflammation levels—and we know that chronically-elevated hsCRP can impair immunity and leave us vulnerable to infection.
Vitamin D
Vitamin D is a hormone that plays several roles in the body, one of which is the production and maintenance of several types of white blood cells. We know there’s a direct link between vitamin D deficiency and elevated risk of respiratory infections—recent research has even found a possible link between severe vitamin D deficiency and severe cases of COVID-19. Adequate levels of vitamin D are difficult to get from diet alone, but the first step towards achieving optimal vitamin D status is measuring your blood levels.
Glucose & hemoglobin A1c
Glucose regulation is a hallmark of proper bodily and cellular function. Impaired glucose regulation can lead to hyperglycemia and insulin resistance, both of which are known to suppress the immune system. Glucose is a short-term measure of this, and hemoglobin A1c provides a more long-term view.
Known as the “stress hormone,” cortisol spurs the body to respond to emotional and physical stressors. And while this function is essential in isolated spurts, chronically-elevated cortisol levels can weaken our immunity, prevent recovery, and make us more susceptible to infections.
Sex hormones
InsideTracker Immunity includes testosterone for men and DHEAS for women. Both are essential anabolic hormones that promote recovery, tissue repair, and energy production. High cortisol levels are almost always paired with low levels of sex hormones, which can exacerbate negative effects on immunity and the body's ability to manage infection. Moreover, emerging research suggests that hormonal imbalance, particularly in relation to aging, may result in poor COVID-19 prognosis. On the flip side, research also indicates that excessively-high testosterone levels may lead to an increase in viral infection susceptibility. So, as with all our biomarkers, keeping your sex hormone levels optimal may be more important than ever.
ALT
ALT is an enzyme found in the liver and muscles. When we exert ourselves in a workout, muscle cells break down and leak ALT into the blood, making it a good marker of physical over-exertion and strain in the body. On a more holistic note, ALT (along with other liver enzymes) can provide insight into our overall health, as elevated levels of ALT have been associated with high levels of hsCRP and systemic inflammation, which we know can impair immunity.
Ferritin
Ferritin is an iron storage molecule, making it an important long-term measure of your iron status. Low ferritin can indicate physical overwork or inadequate recovery, particularly in those who regularly do endurance activities like long-distance running. And if left untreated, iron deficiencies can make us more susceptible to illness. But high ferritin levels can also pose an issue. Like humans, pathogens like viruses and bacteria need iron to survive. When inflammation is high, as is the case during infection, your body hides and stores the iron as ferritin to prevent its uptake from invaders. And it's for this reason that high ferritin can potentially shed light on an infection. Ultimately, your best bet is to get your blood ferritin levels tested to ensure you're in the optimal range.
Magnesium
Much like vitamin D, magnesium is a mineral that serves many functions in the body, including proper brain function, maintaining energy levels, and even supporting quality sleep. This is critical, because sleep is one of the most important immunity-supporting tools we have: 7-8 hours of quality sleep promotes a favorable environment for immune cell function, and lack of sleep can increase your susceptibility to viral infections. We’re therefore including both serum magnesium and red blood cell magnesium in the InsideTracker Immunity panel because optimizing your magnesium levels can help ensure quality sleep and proper recovery, ultimately leading to increased immunity support.
So how can you get these immune-focused insights? You'll then have to schedule a new blood draw (you can visit this page to check current availability by state) to get a snapshot of your current immune system.
Once you get your results back, it’s time to put them into action! When creating your Action Plan on your InsideTracker dashboard, select the “Immunity” goal. This will ensure that the personalized and science-backed recommendations you get prioritize the biomarkers that most heavily affect your immune system.