By reducing oxidative stress in our bodies, we can effectively delay or even halt the ageing process, ultimately extending our lives. – By Dr. Harold Gunatillake
Let us discuss this significant topic today. It is a common aspiration to extend our lifespan while minimising health complications and deferring the effects of oxidative ageing for as long as possible.
This should be the target of every human being who loves living. Empower yourself by understanding the definitions of “free radicals” and “antioxidants”. This knowledge is key to taking control of your health and ageing process.
Antioxidants, the unsung heroes of our bodies, are organic compounds that play a pivotal role in preventing or delaying cellular damage. These substances, found abundantly in various foods, primarily fruits and vegetables, and also available as dietary supplements, are our first defence against oxidative stress. Notable examples of antioxidants include:
Vitamin E: A fat-soluble antioxidant that safeguards body tissues from damage induced by free radicals.
Vitamin C: A water-soluble antioxidant that protects cells against free radical damage.
Selenium: An antioxidant that facilitates the breakdown of peroxides, which can adversely affect tissues and DNA.
Beta-carotene, an antioxidant that has been the subject of hopeful research for its potential benefits in combating cancer and promoting eye health, is a beacon of optimism in the fight against ageing.
Glutathione: Often referred to as the “master antioxidant” due to its status as the most potent antioxidant synthesised by the human body.
Glutathione is made from the amino acids glycine, cysteine, and glutamic acid. It is produced by the liver and involved in many body processes.
Glutathione is involved in tissue building and repair, the production of chemicals and proteins needed by the body, and immune system function.
Antioxidants are essential because free radicals are molecules generated during metabolic processes or due to exposure to environmental factors, such as tobacco smoke, radiation from the sun, or X-rays. These free radicals can damage cells, tissues, and organs and are implicated in developing various age-related conditions.
In which foods can you find the master antioxidant glutathione? The fruits are- strawberries, lemons, avocados, tomatoes, apples, oranges, bananas and pears.
Vegetables: Broccoli, green peppers, carrots, spinach, cauliflower, asparagus, okra, and mushrooms, Eggs, nuts, legumes, fish and chicken are all rich in glutathione.
Glutathione is an antioxidant that occurs naturally in the body’s cells. It helps remove harmful substances such as heavy metals, pollutants, and drugs from the body.
However, the human body doesn’t absorb glutathione well from food because digestive enzymes break it down into amino acids. Cooking, processing, preserving, and storing food can also decrease the amount of glutathione. Fresh and frozen foods have the highest levels of glutathione.
Glutathione is a vital molecule involved in tissue building and repair, synthesising essential chemicals and proteins in the body, and regulating immune system function.
Individuals often utilise glutathione in the management of conditions such as ageing, alcohol use disorder, liver disease, heart disease, and others. However, it is essential to note that there is currently a lack of robust scientific evidence to substantiate these applications.
Having established a foundational understanding of antioxidants, examining the role of free radicals in the human body is essential.
Free radicals are unstable atoms that possess the potential to damage cellular structures, resulting in various health complications and contributing to the ageing process. These reactive molecules are linked to numerous diseases and the overall ageing phenomenon; however, the specific mechanisms
affecting human health and mitigation strategies remain inadequately understood.
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Free radicals are thought to be responsible for age-related changes in appearance, such
as wrinkles and grey hair.
Now, let us go deeper into the study of free radicals. Atoms are surrounded by electrons that orbit them in distinctlayers called shells. Each shell can accommodate a specific number of electrons; consequently, when one shell reaches its maximum capacity, additional electrons will fill the subsequent shell.
When an atom’s outer shell is not filled, it can bond with another atom, utilising electrons to achieve a stable outer shell. Atoms that engage in this behaviour are categorised as free radicals. Atoms with fully occupied outer shells are considered stable, whereas free radicals exhibit instability. To attain stability, freeradicals react swiftly with other substances. For instance, when oxygen molecules dissociate into individual atoms possessing unpaired electrons, these atoms become unstable free radicals that actively seek out other atoms or molecules for bonding. This ongoing process may initiate oxidative stress, which has the potential to damage cellular structures in the body and lead to a variety of diseases. Furthermore, oxidative stress contributes to the manifestations of ageing, including the development of wrinkles.
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Oxidative stress refers to the imbalance between free radicals and antioxidants within the body, resulting in cellular damage. This phenomenon is implicated in various medical conditions, including cancer, Alzheimer’s disease, and cardiovascular disease. Factors such as environmental toxins, including air
pollution and cigarette smoke, can exacerbate oxidative stress. Conversely, the consumption of foods rich in antioxidants can play a significant role in mitigating this imbalance.
An excessive number of free radicals combined with a deficiency in antioxidants can result in significant cellular damage within the body. This surplus of free radicals can adversely affect cells and tissues by damaging critical components, including lipids (fats) and proteins, vital for maintaining normal cellular function. Mechanisms of Oxidative Stress and Cell Death.
Mitochondria, often called the powerhouses of cells, play a crucial role in energy production through oxidative phosphorylation. In addition to generating adenosine triphosphate (ATP), they are a significant source of reactive oxygen species (ROS), byproducts formed during normal mitochondrial function. While ROS are essential for various cellular signalling processes, an overproduction of these molecules can lead to oxidative stress, disrupting cellular homeostasis.
Excessive ROS accumulation can oxidate critical macromolecules, including lipids, proteins, and DNA. This oxidative damage primarily affects mitochondrial DNA (mtDNA), which is particularly vulnerable due to its proximity to the electron transport chain and the lack of protective histones. Mutations in mtDNA can impair mitochondrial function and further exacerbate the production of ROS, creating a detrimental cycle.
Moreover, the accumulation of oxidative damage can trigger various cell death pathways, including apoptosis, a highly regulated process intended to eliminate damaged or dysfunctional cells. This programmed cell death mechanism is vital for maintaining tissue homeostasis. Still, when it is activated inappropriately, it can contribute to the development of various.
diseases, including neurodegenerative disorders, cancer, and age-related ailments. Understanding the balance between ROS production and cellular defence mechanisms is essential for unravelling the complexities of mitochondrial biology and its implications for health and disease.
Role in Aging and Disease:
Chronic oxidative stress is implicated in ageing and various diseases such as cancer, diabetes, cardiovascular diseases, neurodegenerative diseases such as Alzheimer’s and Parkinson’s and inflammatory diseases.
Research suggests that preventing oxidative stress at the mitochondrial level, specifically by limiting the production of reactive oxygen species (ROS), could lead to longer lifespans. As scientific advancements continue, the possibility of significantly enhancing longevity through these mechanisms may become more achievable.
This discussion focuses on preventing and reducing oxidative stress within the human body. A diet rich in antioxidants can play a significant role in neutralising free radicals. It is essential to incorporate foods such as fruits, vegetables, nuts, and seeds, which are excellent sources of vitamins A, C, and E, all exhibiting potent antioxidant properties. Healthy lifestyle choices, such as avoiding smoking and excessive alcohol consumption, can reduce oxidative stress.
As a beer drinker, I can confidently say that beer is a source of valuable antioxidants, including phenolic compounds, melanoidins, selenium, and vitamins B6, B12, E, and C. These antioxidants effectively prevent oxidative stress, protect against DNA damage, and reduce lipid peroxidation. Cheers to the
health benefits of beer! Some wines can help prevent oxidative stress: Red wine: Red wine contains antioxidants that can help reduce oxidative stress and may protect the body from cardiovascular disease (CVD). A study found that moderate red wine consumption increased antioxidant capacity and decreased oxidative stress in the circulation of both young and older people.
Regular exercise and sufficient sleep are essential for effectively preventing oxidative stress. Additionally, exposure to environmental factors such as pollution, pesticides, and radiation significantly contributes to the development of oxidative stress. Taking proactive measures in these areas is vital for maintaining overall health.
Does meditation reduce oxidative stress?
The research findings emphasised the beneficial effects of HFN meditation on participants’ mindfulness, self-compassion, and psychological well-being, demonstrating that HFN meditation significantly helps reduce both psychological and oxidative stress responses.
In conclusion, oxidative stress is an inherent aspect of cellular metabolism. However, when it becomes excessive, it can cause significant cell damage and play a crucial role in developing various diseases and the ageing process.
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If you missed Dr. Harolds’ last Article – here it is!– Ceylon cinnamon: Much more than just a spice – By Dr Harold Gunatillake
