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One of the people I follow ever since I started to work on skin epigenetics back in 2017 and longevity is Harvard professor David Sinclair. He is best known for his work on understanding why we age and how to slow its effects. He was talking about hormesis, a phenomenon where exposure to low doses of stressors induces beneficial effects. A hormetic (cellular defense) response can modulate ageing processes by activating genes related to maintenance and repair pathways through mild stress exposure in our body and skin, leading to enhanced longevity (thus anti-ageing) and health. [1 - 2]
Originating from the early 2000s, the concept of hormesis has evolved to evidenced based dermatological applications. [3] Various factors, including environmental stressors, lifestyle choices, and genetic predispositions, can influence the hormetic responses in skin cells. Understanding these influences is essential for optimizing skin health and beauty through hormetic pathways. Many terms are used for hormetic responses in the scientific literature, including the Arndt-Schulz Law, biphasic dose response, U-shaped dose response, preconditioning/adaptive response, overcompensation responses, rebound effect, repeat bout effect, steeling effect, among others. [4] Ageing is an emergent, epigenetic and a meta-phenomenon, not controlled by a single mechanism. Cellular damage has three primary sources: [3]
Effective homeodynamic space or buffering capacity (body's ability to maintain stability or balance in changing conditions) is characterized by:
Stress response is a reaction to physical, chemical, or biological factors (stressors) aimed at counteracting, adapting, and surviving, is a critical component of the homeodynamic space. There are seven main cellular stress response pathways:
Hormetins can be categorized into three types:
Being aware of the phenomenon of hormesis can result in discovering the usefulness of new compounds, or synergistic effects of combining hormetic treatments which otherwise may have been rejected due to their effects of stress induction. What is bad for us in excess, can be beneficial in moderation, or (quote): "What doesn't kill you makes you stronger". [6]. The future of hormesis in dermatology holds great promise for innovative interventions, advanced hormetic technologies or personalized skin care regimens. Always consult a qualified healthcare professional or dermatologist to determine the most suitable approach for your particular skin condition and rejuvenation goals. Take care! Anne-Marie Read more: The impact of senescent zombie cells on skin ageing The role of heat shock proteins in skin rejuvenation Neurocosmetics, the skin-brain connection & neuro-ageing The role of the lymphatic system in ageing skin The power of light and photo-biomodulation Bio-stimulators Skin glycation Exosomes References
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