Petroleum (free)

Petroleum is a popular cosmetic ingredient often found in skincare.

Benefits:
It can be used as a moisturising agent and a protective barrier from environmental damage.

Potential drawbacks:
Overuse of petroleum can clog skin and increase likelihood of infection.

Petroleum has also been linked to common cancers.

Final thoughts:
Final thoughts: The likelihood of petroleum jelly in small doses having adverse effects is slim, moreover it is a cost effective hydrating ingredient.

References:
https://davidsuzuki.org/living-green/dirty-dozen-petrolatum/