Biological age calculators are growing in popularity, offering you a way to quantify how aging is impacting you. InnerAge 2.0 is InsideTracker’s biological age calculator that uses blood biomarkers and biometric data to give you an estimate of your body’s true, internal age.
Let’s dive into what you should know about biological age blood tests and how they compare to other commercially available aging clocks.
Blood biomarkers are affected by lifestyle factors including food choices, exercise, sleep patterns, stress levels, and recovery. Blood analysis can measure biomarkers correlated with aging and disease, and can be used to compute an overall score for your biological age. Founder and Chief Scientific Officer of InsideTracker Dr. Gil Blander believes, “blood analysis aging tests are the best measure of biological age that we have so far.”
Knowing your true biological age is a great motivator and catalyst for beneficial health changes. Since blood biomarkers are impacted by lifestyle habits, blood testing helps pinpoint the actions you need to take to improve your health. Even if you feel healthy now, crucial markers of healthy aging can start to go downhill even in the absence of physical symptoms. Dr. Blander weighs in on the insights gained from biological age tests stating, “they provide us with tools and actions to improve how we age.” Getting your biological age tested allows you to intervene proactively to optimize your healthspan.
InsideTracker’s InnerAge 2.0 uses blood biomarkers to estimate your biological age. InsideTracker’s team of data scientists identified biomarkers that are most strongly correlated to aging and used them to design an algorithm to calculate your InnerAge and provide interventions for how to lower it.
Certain biomarkers are more strongly correlated with aging than others, and the contribution of each biomarker to your biological age is dependent on this correlation. For example, blood glucose and GGT (a liver enzyme) are both included in the InnerAge 2.0 calculation. However, InsideTracker’s data set showed that glucose is more strongly correlated with age than GGT, so it’s assigned a higher weight in your biological age score.
Utilizing a blood test to determine your biological age is useful to set a baseline for how you are aging. Biomarkers that are typically included in a biological age blood test include metabolic health markers (glucose, LDL cholesterol, and triglycerides), sex hormones (testosterone, SHBG, and DHEAS), liver health markers (GGT), and immune markers (white blood cells).
Metabolism is the way the body utilizes calories from food to produce the energy required to maintain all necessary bodily functions, from breathing to digestion. To be ‘metabolically healthy’ means your body can respond to inputs (like food) and outputs (like exercise) in a positive way. Relevant biomarkers related to metabolic health that correlate to aging include:
Aging is associated with changes in sex hormones. These changes include lower free testosterone, higher sex hormone binding globulin (SHBG), and lower DHEAS. Unoptimized levels of these biomarkers can lead to muscle loss, decreased functional performance, and muscle weakness. Here’s how these biomarkers work specifically to contribute to aging:
Blood is abundant with informative substances such as cells, nutrients, enzymes, hormones, and proteins, all known as blood biomarkers. And there are many reasons why blood analysis is a preferred method for calculating biological age:
Measuring telomere length and using methylation (or epigenetic clocks) to estimate biological age are becoming increasingly common. But the insights these tests provide may not be as insightful or actionable as you think.
Telomeres are the caps at the end of your chromosomes that protect your DNA from getting damaged. Telomere length tends to decrease with age, and shorter telomeres are associated with a higher incidence of disease and lower survival. While telomere length is widely regarded as a good measure of biological age, accurate telomere testing is not widespread yet. Direct-to-consumer telomere tests prove to be highly variable and unactionable.
More research is needed before telomere testing can provide accurate biological age insights to the average consumer.
Epigenetics studies the way that our environment and behaviors impact how our genes work. One type of epigenetics, called DNA methylation, can determine which of our genes are switched on or off. Lifestyle and environmental factors can impact DNA methylation. For example, habits that are beneficial to your health such as getting enough sleep and eating fruits and vegetables can deactivate bad genes while activating good genes.
Biological age calculations, like Hovarth’s Clock, are based on DNA methylation. There are a couple of downsides to DNA methylation calculations of biological age. Currently, the scores these tests provide aren’t easily modifiable with lifestyle changes, and they don’t account for known diseases that affect the aging process. Dr. Blander sees the current limitations, noting “in order to tie a particular lifestyle intervention to a reversal in methylation-based age, then interventional clinical trials are required, and we haven't seen too many of those yet.”
More research is needed before epigenetic clock estimations of biological aging are accurate and useful for consumers.
“You should take a blood-based biological age test if you are motivated to make lifestyle changes and want to target signs of aging,” says Dr. Blander. Taking a biological age blood test provides beneficial insights for everyone, no matter what age or life stage you’re in. It allows you to make lifestyle changes needed to add years to your life and life to your years. You should take a biological age blood test if you want to:
InnerAge 2.0 provides a complete understanding of your healthspan by revealing how well your body is currently working and how well it can work. The InnerAge algorithm compares each of your biomarkers to your peers in age and sex to calculate the distance between your values and the average, and applies a weighted contribution of each marker to your biological age score. InnerAge 2.0 calculation analyzes 17 biomarkers for males and 13 biomarkers for females related to cardiovascular and metabolic health, sex hormone balance, and liver function. The combination of these biomarkers gives you one overall biological age score and the algorithm allows you to see how each individual biomarker impacts your InnerAge.
Any biomarkers that are higher or lower than optimal will affect your biological age, and will be displayed along with recommendations to optimize them and improve your InnerAge. This gives insight into your current health status and lets you take appropriate actions to increase your longevity and optimize your healthspan. Dr. Blander says, “blood biomarker tests [like InsideTracker’s InnerAge 2.0] provide the consumer with ways to improve their health, giving the power back to people to live healthier longer.”
Set your goal to InnerAge to see recommendations for improving your InnerAge-related biomarkers. Get an InnerAge 2.0 plan or add InnerAge 2.0 to the Ultimate Plan. How fast you age is not set in stone, so take steps today to preserve and optimize your physical and cognitive wellbeing.
[1] https://www.cdc.gov/hrqol/wellbeing.htm#three
[2] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6292717/
[3] https://pubmed.ncbi.nlm.nih.gov/27146380/
[4] https://pubmed.ncbi.nlm.nih.gov/21521449/
[5] https://pubmed.ncbi.nlm.nih.gov/32967840/
[6] https://pubmed.ncbi.nlm.nih.gov/21215604/
[7] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC534923/
[8] https://pubmed.ncbi.nlm.nih.gov/31137992/
[9] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4399494/
[10] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3356951/
[11] https://ods.od.nih.gov/factsheets/VitaminD-HealthProfessional/
[12] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3703752/
[13] https://pubmed.ncbi.nlm.nih.gov/28864331/
[14] https://academic.oup.com/ajcn/article/114/3/1049/6195530?login=false
[15] https://health.gov/sites/default/files/2019-09/Physical_Activity_Guidelines_2nd_edition.pdf