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Does Vaseline Darken Lips?


Janelle says…Hi Beauty Brains! Let me start off my expressing how much I love your website! It’s informative, interesting, and best of all…SCIENTIFIC!! I am a college student, and love the last point! My question is, does Vaseline darken lips? I’ve always used it on my lips before I go to bed, but my roommate tells me that it darkens lips because it can be used to get a greater tan – as it is like an oil. Many people are adding their own anecdotal evidence about how it has darkened their lips – but I don’t know what to think! As it is, I have moderately dark lips. Is there any scientific proof? Please help! And many thanks!

The Right Brain responds:

Thanks for the kind words, Janelle! Vaseline is essentially petrolatum (which is closely related to mineral oil) so it’s reasonable to assume that they might work the same way. But we were surprised to find very little research on the effect of tanning oils on skin. (We did find studies on tanning accelerators like L-tyrosine but that’s a story for another day…) Still, after much searching, we did find one reputable source that should definitively answer your question.

Why does oil make you tan better?

Everyone seems to know that rubbing baby oil (aka mineral oil) on your skin will make you tan faster and deeper. Many articles claim that mineral oil “attracts” UV rays. But WHY is that? What’s really happening? According to a paper we found in the Journal of the American Academy of Dermatology, mineral oil (and similar lubricants) are used to in the photo-therapy treatment of psoriasis to enhance the effects of UVB treatment. Apparently the mineral oil smooths scaly skin and decreases the amount of UV radiation that is reflected. Less reflection means skin absorbs MORE UVB rays. And since UVB rays are responsible for tanning, the skin gets darker. That must be how tanning oils work!

Remember, though, that your lips don’t tan. So if you’re asking about the actual lips themselves, this won’t work. But, if you’re asking about the skin of your upper lip, yes, it is very possible that putting Vaseline petroleum jelly on it will make it get darker (after exposure to sun.)

Image credit: http://neweyes.atlblogs.com/archives/february%20134.jpg

Reference: Phototherapy treatment of psoriasis today, Michael Zanolli, MD, Journal of the American Academy of Dermatology Volume 49 • Number 2 • August 2003

{ 10 comments… add one }
  • shabba ranjs November 6, 2014, 9:00 am

    so do they make your lips darker?

  • teresa jeni August 22, 2015, 3:23 am

    vaseline by its own doesn’t darken ur lips …only if its in contact with uv rays it does !

  • Girish September 17, 2015, 4:15 pm

    sO it’s good to apply vaseline on lips at night before sleeping, because UV exposure is bad for lips as well as for skin too.

  • Grace January 29, 2018, 7:23 pm

    For one month I have been putting petroleum jelly on my lips, and then I observe that my upper lips is darkening, it is not balanced.. my lip line on the upper lip is black and pink, I looked like I have been smoking at my young age.. petroleum jelly is good for chapped lips, it can soften your lips like a baby, so I suggest that put it only on your lower lip..
    I also recommend sugar plus lemon or honey and lemon, just put that in your lips daily and brush your lips gently also..

  • Kavita Mevada April 8, 2019, 5:23 am

    Thanks for the tips. Its great.
    Tan on the lips makes your overall look unattractive but beautiful lips perfect face and appearance.

  • Char April 26, 2019, 5:37 am

    my name is Char
    I am south sudanese . I guess I am lucky to have your web page today. I am black skin colored . I have been fighting for lower lip, inner jaw and gum discoloration . the discoloration turn to red but I wanted to be completely black . please would you help me how to darken it ??

  • Prachi June 15, 2019, 8:11 am

    Idk much abt the research bt in my case my lips did got tan after using vaseline petrolium jelly(which I used for almost as long as I can remember) I m 19 right btw. I hv a fair complexion n those ashy tanned lips never matched w my overall face. Then i couldn’t use it for some reason for a week n u won’t believe my lips r getting more pink w each passing day n i m nt doing anything except avoiding putting vaseline on my lips. I m ecstatic w the result n hence decided to never use vaseline on my lips would use it for other purpose tho.. Rest u decide have a great day.

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