26/07/2021
Longevity: Life Extension Properties of Green Tea's Epigallocatechin-3-gallate (EGCG)
A unique compound from green tea called Epigallocatechin-3-gallate (EGCG) is gaining a lot of attention due to its positive impact on health and life extension. It is a plant-based compound called catechin and catechins are part of a group called polyphenols, of which EGCG being the most abundant and potent catechin in green tea(1). Based off its chemical structure, EGCG is classified as a potent antioxidant that may protect against cellular damage caused by free radicals. Additionally, research demonstrates that EGCG may be beneficial in reducing inflammation and offers protection against cardiovascular disease, cancer, diabetes, osteoporosis and neurodegenerative diseases(2).
Studies have shown that elderly Japanese people who drank more than 3 cups of green tea per day, were associated with lowered rates of death from stroke, heart disease and respiratory diseases (3)(4). Another study conducted over 6 years with 14,000 elderly Japanese people showed that drinking green tea was associated with lower mortality from all causes(5).
EGCG not only protects against disease, but it also addresses a number of mechanisms related to aging, making it a great tool for longevity. In cell-based studies, green tea polyphenols protected telomeres from shortening which suggests its potential for increasing longevity(6). Telomeres shorten with every cell division as we age, so by protecting telomeres we could see a possible increase in the Hayflick limit of the cell (increasing how many times a cell can divide before it becomes a senescent cell) which could lead to a longer lifespan. In animal studies, EGCG extends lifespan by reducing liver and kidney damage, lowering cellular senescence and improves age related oxidative stress and inflammation. It does this through the inhibition of NF-kB signaling by activating the longevity factors Fox03a and SIRT1(7)(8 ). It also triggers mitochondrial biogenesis which restores mitochondrial function, this then leads to increased energy (ATP production) and lowered cellular dysfunction which helps slow down the aging process. This increase in lifespan due to EGCG depends on known energy sensors such as AMPK/AAK-2, SIRT1/SIR-2.1 and FOXO/DAF-16. It has shown to be more effective in younger adults and declines with age(9). So, to gain the most benefits out of EGCG, it is advised to start taking it earlier in life rather than later as it is more effective in slowing down the aging process when we are young. Long term consumption of EGCG has shown to be safe and effective at addressing aging via its influence on several aspects of aging and senescence which increase health span and lifespan(10).
In addition to EGCG’s longevity benefits, it also improves cognitive health as we age. It helps reduce neurodegenerative diseases through increasing neuritogensis(11). This is the process of forming new neurites (that develop in axons and dendrites) which extend from the brain cell body. The process happens during the brain’s development and the term neurite is used to refer to the early stages of growth before the axon and dendrites are differentiated. EGCG is also neuroprotective, meaning it protects the neurological system. It is able to do this via decreasing reactive oxygen species, protecting cells against mitochondrial dysfunction and lowers glutamate excitotoxicity. It preserves mitochondrial energetics and limits neuronal damage and inflammation in the brain(12).
Overall EGCG is a great longevity compound to add to anyone’s supplemental stack or formula. It helps ward off age related diseases and may increase lifespan through numerous longevity pathways within the body. The best dose for therapeutic effects is around 200mg EGCG per day with meals. EGCG along with other longevity compounds should be taken in early age to gain maximum benefits, as it’s easier to slow down the aging process in healthy young individuals then it is to reverse age in the elderly.
Written by Luke Pavasovic
Director and Naturopath at Alchemic Health
Alchemic Health
www.alchemichealth.com
References:
1. https://pubmed.ncbi.nlm.nih.gov/24494192/
2. https://pubmed.ncbi.nlm.nih.gov/20716914/
3. https://pubmed.ncbi.nlm.nih.gov/16968850/
4. https://pubmed.ncbi.nlm.nih.gov/31392470/
5. https://pubmed.ncbi.nlm.nih.gov/19628408/
6. https://pubmed.ncbi.nlm.nih.gov/22000973/
7. https://onlinelibrary.wiley.com/doi/full/10.1111/acel.1213
8. https://pubs.rsc.org/en/content/articlehtml/2019/ra/c9ra03313k
9. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5635249/
10. https://www.biorxiv.org/content/10.1101/2021.01.01.425058v1
11. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6696481/
12. https://nutritionj.biomedcentral.com/articles/10.1186/s12937-016-0179-4
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