Status Updates From The Skincare Bible: Your No...

Androgen levels (such as testosteron) rise during puberty. It acts on the skins oils and makes your sebaceous glands bigger, especially on areas in wich there is a high density of oil-producing glands (face, back and chest). That can mentally lead to low self esteem and an altered body image. The ignorance of that could be detrimental. You also lose more water through your skin (sweating, look up CAH).

She's just saying the following terms are not to be trusted because they're either not legally regulated, given the global certification from a small test or simply depends on the skin: hypoallergenic, non comedogenic, clinically proven, dermalogically tested, natural and organic

Cleansing: bar soaps (harsh), foaming (oily: lathering, dry: non lathering), cleansing milk (dry: disolve oil) , toner (oily: alcohol can dry tho), micellar water (cleansing oil molecules suspended in water), double cleansing (50/50)
Serums
Moisturizers: humectans (bind), occlusives (prevent), emmolients (replaces)
Eye Cream: just pat
Exfoliation: AHA (food) BHA (oil soluble mol)
Masks: meh
Sunscreen: must

Our skin texture consists of
Epidermis (UVB rays): containing keratinocytes (protection and waterproofing), melanocytes (absorb rays), langerhans cells (immune system) and merkel cells (sensory)
Dermis (UVA rays): papillary (rich in nervendings) and reticular (collagen, Elastin and Hyaluronic acid
Theres intrinsic (telomere shortening, mitochondrial damage, hormones) and extrinsic ageing (UV rays)