Autophagy and Antiaging Skin Care Ingredients
Autophagy slows skin aging by removing old cell components that stimulate or cause aging. The ability of cells to perform autophagy decreases with age causing skin aging.(1,2)
Antiaging skincare products are beginning to try and increase autophagy to rejuvenate skin.
Autophagy Benefits for Skin
Increasing skin autophagy, especially of mitochondria, is a new way to slow skin aging. Many new ingredients are being developed for skin care products to reverse skin aging by increasing autophagy.
Autophagy (3) is the process of cell ‘eating themselves”. (4) In other words, cells break down old organelles and recycle them.
Autophagy serves the purpose of eliminating senescent cells, damaged organelles, proteins, and pathogens, as well as regulating apoptosis (programmed cell death), cell differentiation, immunity, and inflammation.
Skin Care Ingredients
Cosmetic ingredients that increase autophagy in skin are:
Crepidiastrum Denticulatum Extract
Exosomes
Heptasodium hexacarboxymethyl dipeptide-12 ( Aquatide™)
Melatonin
Resveratrol
Saururus Chinensis
The best skincare ingredients to treat skin aging depends upon what your Baumann Skin Type® is.
Our advice is to take the skin care quiz, find out your skin type, and our dermatologists will give you specific skin care routine recommendations.
These may include skin care ingredients that increase autophagy.
Take the Quiz
Skin Care Products
Many new skin care products are being developed to help increase autophagy and decrease the number of senescent cells. Examples of products that contain autophagy increasing ingredients are shown below.
The Science Of Autophagy
The science of aging skin is well understood. Autophagy has been newly discovered as an important part of the skin aging process.
Autophagy is the process by which lysosomes fuse with a cellular organelle and digest it. This recycles the cellular components.
Autophagy regulates extracellular matrix (ECM) metabolism by affecting matrix metalloproteinases (MMPs).
Blocking autophagy leads to an increase in MMPs and an increase in collagen breakdown. TGF-β is a growth factor involved in the regulation of autophagy. (7)
Autophagy has a circadian rhythm (8).
Autophagy in skin aging
Mitochondria and Autophagy
The ability for mitochondria to generate autophagy is particularly important in preventing aging because old mitochondria cause damaging free radicals. Increasing autophagy, especially in mitochondria, is an anti-aging strategy. Increasing autophagy delays aging in flies, worms, and mice.(10)
Substances that induce autophagy such as lithium and trehalose have been shown in nematodes and mice to improve mitochondrial function, reduce senescence, and expand the lifespan.
Sirtuins and Autophagy
Sirtuin-1 (SIRT-1) has been shown to be the reason that caloric restriction improves health and longevity. Activation of SIRT-1 induces autophagy (11).
SIRT-1 is known to be activated by resveratrol (5) and melatonin.(6)
Autophagy and Skin
Autophagy is seen in both proliferating and differentiating keratinocytes. It helps maintain skin stem cells by promoting the removal of oxidized molecules, improves nucleotide excision repair (12) and removes lipofuscin. (13)
Old human dermal fibroblasts have significantly less autophagy than those of young dermal fibroblasts. Loss of autophagy leads to the induction of cellular senescence. Cellular senescence leads to skin aging.
Skin Pigmentation
Decreased autophagy has been seen in melasma due to the lack of degradation of melanosomes resulting in increased skin pigment in the keratinocytes. (16,17)
Autophagy and Diet
Autophagy is induced by nutrient starvation, oxidative stress, infection, and two protein kinases (unc-51 like kinase complex and the phosphatidylinositol 3-kinase complex).(9) We are still learning how to increase autophagy but the most proven way to increase autophagy is with intermittent fasting and caloric restriction. Upregulation of autophagy is thought to contribute to the prolongation of lifespan seen with caloric restriction.
