3. Cell senescence results in no replication of DNA, Hormones decrease, leading to cell death
4. Mitochondrial DNA Damage results in protein damage
5. Reactive Oxygen Species (ROS) increase, leading to radicals, inflammations, and developing diseases damaging the protein
Extrinsic Aging
1. Environmental factors affect the rapid process of skin aging
2. Usually caused by UV-A
3. Protease activity increases, TIMP activity decreases resulting in direct protein damage
4. Amino acids (W, H, Y, F, C) result in direct protein damage
INTRINSIC AGING
1. A natural result of aging - chronological aging process
2. Affects the skin on the entire body
3. Characterized by thinning of the dermis, degeneration of the elastin network, and loss of hydration
EXTRINSIC AGING
1. Also called PHOTOAGING, caused by sun exposure
2. Affects skin of the face, neck, hands, forearms
3. Effects include coarse skin with wrinkles, hyperpigmented areas, sallowness, increased fragility, textural roughness, telangiectasia
Effects of Extrinsic Aging
Effects of UV Radiation on Skin
UVA - Responsible for skin tanning, loss of Langerhans cells in the dermis and epidermis
UVB - Responsible for skin burning
UVC - Unable to penetrate the ozone layer
Types of radiation
UVA
UVB
UVC
UVA radiation is primary responsible for skin tanning
UVA radiation results in the loss of Langerhans cells in the dermis and epidermis
UVB radiation is primary responsible for skin burning
UVC radiation is unable to penetrate the ozone layer and thus does not reach the Earth’s surface
Anti-aging ingredients
Invasive technologies
Non-invasive technologies
Botanical extracts
Antioxidants
Peptides and proteins
Retinoids
Invasive technologies
1. Chemical peels (e.g. Maxipeel)
2. Topical injections of chemicals (e.g. Botulinum toxin) and various dermal fillers
3. Dermabrasion, various laser devices, as well as corrective surgeries
Non-invasive technologies
1. Primary prevention
2. Application of creams which prevent UVA
3. Healthy lifestyle
4. Refrain from smoking, pollution
5. Using sunscreens
6. Topical cosmetics and drug products applied directly to the skin
7. Microdermabrasion (on the stratum corneum)
Botanical extracts
1. Bioactive ingredients in anti-aging products
2. May be in powder or liquid form
3. Amount is very minimal
Effects of botanical extracts
Antioxidant: Coffee, Pomegranate
Photoprotection: Black Tea, Olive
Smoothing, Calming, Anti-inflammatory: Chamomile and Various mushrooms
Skin Lightening: Blueberry, Ginseng
Skin tightening: Peppermint, Witch Hazel
Emollient Effect: Jojoba, Coconut Extract
Types of potent anti-aging ingredients
Echinacea purpurea
Stevia rebaudiana
Rosa damascena
Phyllanthus emblica
Morus alba
Antioxidants protect the cells from damage by neutralizing the free radicals
Examples of antioxidants
Vitamin C, vitamin B3, and vitamin E
Botanical extracts (green tea and grape seed extract)
Resveratrol, lipoic acid, ferulic acid, and coenzyme Q10 or ubiquinone
Antioxidants stimulate collagen production, preserve hyaluronic acid levels in the skin, and also exert anti-inflammatory effects
Peptides and proteins
1. Topical formulations & injectable products
2. Anti-inflammatory, wrinkle reduction by stimulating collagen production, thickening the skin and firming it; smoothing; moisturization; and skin protective effects
Retinoids
1. Work at the molecular level through receptors in the skin cells
2. Lipophilic molecules that can penetrate the epidermis and enter the dermis
3. Improvement of surface roughness, improvement of age spots, and reduction of fine lines by decreasing the amount of collagen breakdown and stimulating the production of new collagen
Retinoic acid
Originally intended for acne treatment
Retinoic acid can irritate the skin & cause photosensitization
Topical retinol derivatives
Retinyl esters
Retinol
Retinaldehyde
Oxiretinoids
Hydroacids
Alpha-hydroxy acids (AHAs)
Beta-hydroxy acids (BHAs)
Poly-hydroxy acids (PHAs)
Bionic acids (BAs)
Aromatic hydroxy acids (AMAs)
Alpha-hydroxy acids (AHAs) examples
Lactic Acid
Glycolic Acid
Malic Acid
Tartaric Acid
Citric Acid
Beta-hydroxy acids (BHAs) examples
Beta-Hydroxybutonic Acid
Poly-hydroxy acids (PHAs) examples
Gluconolactone
Bionic acids (BAs) examples
Lactobionic Acid
Aromatic hydroxy acids (AMAs) examples
Salicylic Acid
Alpha Hydroxy Acids (AHA) vs Beta Hydroxy Acids (BHA)
Characteristics comparison
Alpha Hydroxy Acids (AHA)
Water-loving
Dissolves & exfoliates surface dead skin cells
Makes the skin sensitive to the sun
Humectant/hydrating benefits
Stimulates collagen
Beta Hydroxy Acids (BHA)
Oil-loving
Penetrates into the pore dissolving dead skin cells, blackheads, sebum etc.
2. Medium-depth peels damage entire epidermis and upper dermis
3. Deep peels wound the mid-dermis, cause protein coagulation, and complete peeling of epidermis with restructuring of basal layer and restoration of dermis
Delivery Systems
1. Liposomes are microscopic spherical vesicles with a lipid bilayer structure
2. Act as skin moisturizer
3. Shorten the shelf-life of formulations
Studies show that liposomes are rigid and cannot deeply penetrate the skin
Liposomes
Hydrophilic head, hydrophobic tail
Delivers the active ingredient present in the anti-aging formulations
Aid to deliver and improve the effectivity of the formulation
Formulation is usually in an emulsion form which is why delivery systems are used
Similar to micelles, but micelles are unicellular while liposomes have a bilayer