Darin OlienBA (exercise physiology, kinesiology, nutrition), per his own site; no institution named · author and podcast host
Yes: it suffocates and clogs pores and only looks like hydration
What it rests onSealing the skin blocks its own signal to moisturise itself, and the product is a refined by-product of the oil industry that gives the skin nothing it can use
Source: podcasts.happyscribe.com ↗
Joe SchwarczPhD · chemist, director of the McGill Office for Science and Society
No: it is completely safe and it works, with one bounded caveat
What it rests onIt prevents moisture in the skin from evaporating, which is what a moisturiser does; the caveat is specific, that people with oily skin have to take care because it can gum up hair follicles and cause skin eruptions
Source: mcgill.ca ↗
Schwarcz's concession is confined to people with oily skin and framed as a cosmetic nuisance. Olien generalises the same effect to everyone and frames it as a mechanism of harm. Neither addresses infants or wound care, where occlusives are standard practice.
Both describe the same physics: petroleum jelly is occlusive and does not itself add water. They disagree on whether that counts as moisturising and whether the follicle effect is a nuisance or a harm.
Evidence on whether sealing normal skin day after day measurably weakens its barrier, as distinct from the spots and follicle irritation both sides already accept in oily skin.
You do, and your call is dated, kept, and yours to change. Follow the people you already trust and what they publish turns into a short daily practice.
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