@dr.tetk · Updated October 2026
Calgary board-certified dermatologist and occasional comedian
Dr Tet is a Calgary board-certified dermatologist and occasional comedian who shares skincare tips from the exam room. Tet explains French and Korean pharmacy finds, K-beauty, hair care and sun protection. The content is for people who want dermatologist-backed skincare and hair care education, plus fans of medical humor.
Tet's posts cover SPF versus UVA protection and PA ratings, cleansers for reactive skin, madecassoside and barrier repair, and timelines for retinol, vitamin C and niacinamide. Other posts cover hair loss myths, Korean hair and scalp care products, and melanoma awareness. A Halloween humor series lists what scares a dermatologist, from scabies to running out of liquid nitrogen. Conference and travel clips from EADV Congress and London show the working life.
Dermatologist-led skincare and hair care education, K-beauty pharmacy finds decoded, sun protection facts and dermatology workplace humor.
EADV Congress
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@dr.tetk
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Where they postInstagram, TikTok
Known forSunscreen and UVA protection, K-beauty and Korean hair care, hair loss education
Sources Instagram
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SPF only measures UVB. Explains UVA protection, the broad spectrum label and PA ratings on Korean and Japanese sunscreens.
Watch the postA numbered list of six Korean hair and scalp care products, including CosRX, Ryo and Seapuri lines.
Watch the postTimelines for retinol, vitamin C and niacinamide, and why results take weeks to months.
Watch the postHair loss points on biotin, traction alopecia, minoxidil strength and getting a diagnosis before treatment.
Watch the postFour cleansers that remove mascara without stripping skin, aimed at reactive skin and barrier repair.
Watch the post2026-10-25
Dermatology humor part 2: five things that scare a dermatologist, from clinic internet outages to low lidocaine
Watch the post2026-09-28
Gua Sha at airport security: a travel humor clip joking the skincare tool looks like brass knuckles
Watch the postTet is a board-certified dermatologist in Calgary who shares tips from the exam room. Topics include sunscreen, cleansers, barrier repair, retinol and vitamin C timelines, hair loss, K-beauty and melanoma awareness. There is also dermatology humor.
Tet explains that SPF only measures UVB, the rays that cause sunburn. UVA rays go deeper, age skin and add to skin cancer risk. Two SPF 50 sunscreens can differ in UVA protection. Tet points to the broad spectrum label and to PA ratings (PA+ to PA++++), common on Korean and Japanese sunscreens.
Tet gives these timelines: retinol 3 to 6 months for full effects, vitamin C 2 to 4 weeks for glow and up to 12 weeks for dark spots, and niacinamide weeks for redness and up to 12 weeks for pigmentation.
Tet posts clinic humor, including a Halloween series on what scares a dermatologist, such as scabies, running out of liquid nitrogen and clinic internet outages. Tet also posts clips from the EADV Congress and a London trip.
Yes. Tet posts a list of six Korean hair and scalp care products, including CER 100, Mise En Scène, A'pieu, CosRX, Ryo and Seapuri. Tet also posts on madecassoside and cica for winter skin.