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Langhans W, Hrupka B (1999)

Cigarette Stains on Enamel: The Combined Effect The combined effect of nicotine and tar on tooth enamel is what creates the characteristic appearance of cigarette stains on enamel , a layered discoloration that includes both surface tar deposits and deeply embedded nicotine pigmentation

This is advance warning

Heres a list of feeding aversion symptoms to look out for: Skipping feedings without signs of distress Appears hungry but not eating Fusses when the bib is put on its neck Fusses or back arches when a bottle or breast is offered Turns away from breast, bottle, spoon, and/or food Takes only a small portion of milk or food offered, then cries or arches the back (arching the back is an indication of distancing) Feeds best when sleepy or asleep Consumes less milk than expected Refuses milk but eats solid food May have poor weight gain, slow growth, and a diagnosis of failure to thrive Watching your baby refuse feedings can be extremely stressful and can send us down the rabbit hole of figuring out causes, such as acid reflux

It does not mean quitting smoking worsened acne long-term it means the anti-inflammatory masking effect has been removed before the androgenic improvement has had time to develop