Is propylene glycol bad for your liver?

Could you please elaborate on the potential risks of propylene glycol on liver health? Is there scientific evidence suggesting that prolonged exposure or high doses of propylene glycol could have a negative impact on liver function? Are there any studies that have specifically linked propylene glycol consumption to liver damage or disease? Additionally, what are the recommended safety guidelines for propylene glycol consumption, and are there any precautions that should be taken to minimize potential risks to liver health?