Immunology - Dr. Pascal Mensah | Ymmunoledge

Heritability of intrinsic human life span is about 50%

Pascal MENSAH — Mon, 02 Feb 2026 13:06:53 +0000

Recent advances in aging research are reshaping how we understand human lifespan heritability and longevity. A landmark study published in Science shows that when deaths from external causes such as infections, accidents, and environmental hazards are mathematically removed, up to 50–55% of human lifespan variability appears to be genetically determined. This does not mean that our fate is written in our DNA—but it does mean that biology matters more than we previously thought.

Genetics set the baseline. They influence how efficiently we repair DNA, manage inflammation, detoxify pollutants, regulate metabolism, and respond to stress. In other words, they define the starting conditions of our aging process. Yet genes are not destiny. They are instructions whose expression is constantly shaped by lifestyle, environment, and metabolic health.

This is precisely where personalized medicine begins. Most of the interventions that protect longevity—nutrition, physical activity, sleep, stress regulation, toxin avoidance, targeted supplementation—do not alter DNA sequences. They act on gene expression, mitochondrial function, immune balance, and metabolic resilience. Knowing your genetic profile allows these interventions to be more precise, more effective, and safer.

Think of genes as defining the ceiling of your biological potential. Lifestyle determines how close you get to that ceiling—and how many years you live with vitality rather than chronic disease. Importantly, individuals with higher genetic risk often stand to benefit more, not less, from early and well-designed preventive strategies.

Checking your DNA is not about predicting illness or creating anxiety. It is about understanding your unique biology, anticipating vulnerabilities, and making informed choices that support long-term health. When genetics and lifestyle are aligned intelligently, longevity becomes not just longer—but better.

Read the original study published in Science
Ben Shenhar et al. ,Heritability of intrinsic human life span is about 50% when confounding factors are addressed.Science391,504-510(2026).DOI:10.1126/science.adz1187

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Understanding Your Immune System’s Non-Heritable and Heritable Responses

Pascal MENSAH — Sat, 04 Nov 2023 17:05:53 +0000

Understanding immune system heritability and non-heritable responses is key to taking actionable steps to support healthy adaptation in everyday life. Through adaptation, your body can better defend against potential threats, keeping you healthy and strong and maintaining a good balance of homeostasis. This post will explore the topic calmly and informally, focusing on understanding and supporting your immune system best. (Keywords: adaptation, health, immune system).

Read the original study published in Cell
Brodin, P., Jojic, V., Gao, T., Bhattacharya, S., Angel, C. J. L., Furman, D., … & Davis, M. M. (2015). Variation in the human immune system is largely driven by non-heritable influences. Cell, 160(1-2), 37-47.

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GINSENG effects

Pascal MENSAH — Mon, 24 Apr 2023 15:55:11 +0000

Nuclear factor kappa B (NF-κB) signaling pathways progress inflammation and immune cell differentiation in the host immune response; however, the uncontrollable stimulation of ginseng effects on NF-κB signaling is responsible for several inflammatory illnesses regardless of whether the conditions are acute or chronic.

Innate immune cells, such as macrophages, microglia, and Kupffer cells, secrete pro-inflammatory cytokines, such as TNF-α, IL-6, and IL-1β, via the activation of NF-κB subunits, which may lead to the damage of normal cells, including neurons, cardiomyocytes, hepatocytes, and alveolar cells. This results in the occurrence of neurodegenerative disorders, cardiac infarction, or liver injury, which may eventually lead to systemic inflammation or cancer.

Recently, ginsenosides from Panax ginseng, a historical herbal plant used in East Asia, have been used as possible options for curing inflammatory diseases. All of the ginsenosides tested target different steps of the NF-κB signaling pathway, ameliorating the symptoms of severe illnesses.

Moreover, ginsenosides inhibit the NF-κB-mediated activation of cancer metastasis and immune resistance, significantly attenuating the expression of MMPs, Snail, Slug, TWIST1, and PD-L1.

This review introduces current studies on the therapeutic efficacy of ginsenosides in alleviating NF-κB responses and emphasizes the critical role of ginsenosides in severe inflammatory diseases as well as cancers.

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Immunosenescence

Pascal MENSAH — Fri, 17 Feb 2023 20:22:11 +0000

Immunosenescence is the decline of the immune system that occurs with age. As we age, our immune system becomes less effective at responding to new threats. In this blog, we will uncover the myths associated with immunosenescence and discuss how we can age gracefully while still maintaining a healthy immune system. We will explore the latest advances in medical research and provide helpful tips on how to keep your immune system in top shape, no matter how old you are.

1. What is Immunosenescence?

Immunosenescence is a natural process of aging, but that doesn’t mean it can’t have a major impact on our health and well-being. Studies have indicated that immunosenescence can increase the risk for age-related diseases and even lead to a decreased response to certain vaccines. Despite this, immunosenescence is not necessarily a death sentence. By understanding the process of immunosenescence and taking preventative measures, we can reduce the risk of age-related diseases and keep our immune systems functioning at their best. It’s important to remember that immunosenescence is a natural process that we can’t avoid, but it doesn’t have to be a cause for alarm. With the right preventative measures and lifestyle adjustments, we can keep our immune systems healthy and functioning well into our later years.

2. Causes

Immunosenescence is a complex phenomenon that is still not fully understood. However, it is clear that it is caused by a combination of several factors, including age, lifestyle, and environmental factors. Age is the most significant factor, as the body naturally becomes weaker with age, and its ability to fight illnesses and infections decreases. Lifestyle factors such as smoking, stress, and poor nutrition can also contribute to immunosenescence, as can environmental factors such as air pollution and exposure to toxic materials. All of these factors can lead to a weakened immune system and increased susceptibility to disease. While it is impossible to completely prevent immunosenescence, understanding its causes and taking steps to reduce the impact of these risk factors can help to reduce the effects of ageing on the body and improve overall health and well-being.

3. Symptoms and Signs

Immunosenescence is a natural process of aging, but the myths surrounding it are often misunderstood and misrepresented. The truth is that immunosenescence is a natural part of the aging process and should not be feared. The signs and symptoms of immunosenescence are typically not life-threatening and can be managed with proper medical care. Many of the common signs and symptoms, such as fatigue, low energy, and weakened immunity, can be managed with lifestyle changes, such as eating a balanced diet, exercising regularly, and getting adequate rest. Additionally, immunosenescence can be managed with medications and other treatments to minimize the effects. The key to managing immunosenescence is to identify the signs and symptoms early and to work with a doctor to develop the best treatment plan for you. With the right approach and lifestyle changes, immunosenescence can be managed and will not have a significant impact on your life.

4. Treatments

As we age, one of the most debilitating changes to our bodies is the decline in our immune system’s ability to protect us from infection and illness. This decline, known as immunosenescence, can lead to increased susceptibility to diseases and a decreased response to vaccinations. While the exact mechanisms of immunosenescence are still being studied, some treatments and lifestyle changes can help to counter its effects. One of the most important steps to take is to ensure that you are getting adequate nutrition, as a healthy diet is essential for maintaining the strength of your immune system. Eating a balanced diet that is rich in fruits and vegetables, as well as lean proteins, will provide your body with the nutrients it needs to stay healthy. Additionally, it is important to get enough rest, as this will help to keep your immune system strong. Exercise is also an important part of a healthy lifestyle and can help to offset some of the effects of immunosenescence. Regular physical activity can help to reduce inflammation and strengthen your immune system. Furthermore, it can help to reduce stress levels, which can have a positive effect on your immune system. Finally, there are medications and supplements that can be taken to help strengthen the immune system. These include vitamins, minerals, and herbal supplements that can help to boost the immune system and increase its ability to fight off infections. Additionally, there are some medications that can help to reduce inflammation and reduce the effects of immunosenescence. By making lifestyle changes and taking the right supplements, you can help to reduce the effects of immunosenescence and remain healthy as you age. With the appropriate treatments and lifestyle changes, you can stay healthy and enjoy a long and active life.

5. Uncovering Myths about Immunosenescence

Immunosenescence is a complex and multifaceted process that involves not only the deterioration of the immune system but also the psychological and social changes that accompany ageing. As we age, our bodies become more susceptible to illnesses and infections, and our ability to fight them off declines. This can lead to a feeling of increased vulnerability, which can be disempowering and cause emotional distress. It is important to recognize, however, that immunosenescence does not have to be a life sentence of poor health and diminished quality of life. By understanding the myths associated with immunosenescence and the reality of the changes that come with ageing, we can take steps to protect our health and well-being. Through a combination of lifestyle modifications, proper nutrition, and exercise, we can reduce the risk of illness and maintain a high quality of life as we age.

6. Conclusion

With the growing understanding of immunosenescence, there is a need for more research to uncover the myths surrounding it. By doing so, we can gain a more in-depth understanding of how to protect our health as we age. Immunosenescence is a natural process that occurs as we age. It’s characterized by a decline in the function of our immune system. This decline can lead to an increased risk of infection, illness, and disease. However, immunosenescence does not have to be a life sentence of poor health and diminished quality of life. With a combination of lifestyle modifications, proper nutrition, and exercise, we can reduce the risk of illness and maintain a high quality of life as we age. Understanding the ageing process and finding strategies to counter its effects. A more in-depth understanding of immunosenescence will not only help us address the health challenges of our ageing population, but it may also offer us insights into other aspects of ageing, such as cognitive decline, which can have a profound impact on our way of life. With the right resources and research, immunosenescence can be a powerful tool in improving the overall health and well-being of our ageing population.

Read the official NIH article on cellular senescence and healthy aging
Does cellular senescence hold secrets for healthier aging? National Institute on Aging (NIH), 2021.

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Your Immune System is the key to adaptation

Pascal MENSAH — Thu, 02 Feb 2023 12:33:50 +0000

We know so far that immune system adaptation is the body’s natural ability to protect itself from harmful substances, such as pathogens (e.g., bacteria, viruses, parasites) and toxins. It refers to the ability of an individual or a population to resist and recover from a disease. It can be acquired through natural means, such as when a person contracts and recovers from an illness or artificially through vaccination or other medical intervention.

Adaptation refers to the process by which a population of organisms changes over time in response to changes in their environment. This can involve physiological changes, such as the development of new features or traits that help the organisms better survive and reproduce in their environment, or behavioural changes, such as changes in migration patterns or mating habits.

The principle of immunity as an adaptation system refers to the fact that the body has evolved over time to develop mechanisms not only for protecting itself from harm but, above all, for maintaining homeostasis. This includes both innate immunity, which is non-specific and present at birth, and acquired immunity, which is specific to a particular pathogen and develops over time through exposure or vaccination.

Both types of immunity help keep the body balanced and healthy by gauging the environment and are essential for the body’s overall well-being.

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