Can 'vaping' (e-cigerettes) with nicotine in a propylene glycol solution cause elevated liver enzymes. not sure if nicotine has an effect on liver? ty

No: Nicotine has no adverse effect upon the liver unless you had a major overdose which only happens with the administration of large doses of nicotine. These doses cannot be met by smoking or vaping. Propylene glycol won't cause problems either. I would worry about chronic lung damage and nicotine addiction. If your liver enzymes are elevated, your doctor needs to find out the reason.

Vaping: "Smoking may affect the liver through inflammatory pathways and may aggravate the pathogenic effects of alcohol on the liver. " REF: https://www.ncbi.nlm.nih.gov/pubmed/20511375.As of 11 SEP 2019 The Centers for Disease Control and Prevention reported 6 deaths & > 450 possible cases of severe lung injury in 33 states & 1 jurisdiction related to vaping. Mechanism of injury is poorly understood.