Vaseline can help with stretch marks, but it’s not a miracle cure. Petroleum jelly works primarily by locking moisture into the skin, which can soften the appearance of stretch marks over time and may help prevent new ones from forming during periods of rapid skin stretching. It won’t erase stretch marks completely, but it’s an inexpensive option that performs about as well as most over-the-counter creams marketed specifically for stretch marks.
How Vaseline Works on Skin
Petroleum jelly is an occlusive, meaning it forms a barrier on the skin’s surface that prevents water from escaping. In clinical measurements, applying Vaseline reduced water loss through the skin by roughly 34%, dropping from about 11.3 to 7.4 grams per square meter per hour. That’s a significant improvement in how well your skin holds onto moisture.
This matters for stretch marks because hydration plays a direct role in how skin heals and how flexible it stays. When skin is well-hydrated, the cells responsible for producing collagen and elastic fibers function more effectively. Dehydrated skin is stiffer and more prone to tearing at the deeper dermal layer, which is exactly what creates stretch marks in the first place.
What Vaseline Can and Can’t Do
Stretch marks come in two stages. Newer ones (often red, pink, or purple) are still actively healing and respond better to treatment. Older ones that have faded to white or silver are mature scars where the collagen has already settled into its final pattern. Vaseline’s effects differ depending on which type you’re dealing with.
For newer stretch marks, consistent moisturization can genuinely help. Research on occlusion therapy shows that keeping skin hydrated regulates the production of signaling molecules that control scarring. Specifically, hydration shifts the balance between factors that promote excessive scarring and those that limit it. Since stretch marks are anatomically similar to scars, the same principles apply. Keeping newer marks well-moisturized can reduce their redness, improve texture, and help them fade more quickly.
For older, white stretch marks, Vaseline is less effective on its own. At that stage, improvement requires stimulating new collagen and elastic fiber production, which petroleum jelly doesn’t actively do. It supports the process by keeping the area hydrated, but you’re unlikely to see dramatic visible changes from Vaseline alone on mature marks.
How It Compares to Other Products
The stretch mark product market is enormous, and most of it overpromises. Cocoa butter is probably the most widely recommended home remedy for stretch marks, yet in clinical studies it performed no better than a placebo. The same is true for many expensive creams and oils that claim to prevent or erase stretch marks.
Vaseline’s advantage is honesty by default. Nobody markets it as a stretch mark cure, but its core function (sealing in moisture) addresses one of the key mechanisms that helps skin heal. A review of moisturizer studies found that hydration itself is a key component in reducing the visible signs of both scars and stretch marks, regardless of the specific product used. In other words, keeping the skin consistently moisturized matters more than which fancy ingredient list is on the label.
Products containing retinoids (available by prescription) and certain professional treatments like laser therapy or microneedling do have stronger evidence for improving stretch marks, particularly older ones. But among drugstore options, Vaseline is a reasonable, low-cost choice that does the single most important thing: it keeps your skin hydrated.
How to Apply It for Best Results
The American Academy of Dermatology recommends applying petroleum jelly to damp skin for maximum benefit. After a shower or bath, pat your skin until it’s still slightly wet, then apply a thin layer of Vaseline over the stretch marks or areas prone to stretching. The damp skin provides the moisture, and the petroleum jelly traps it in place.
Consistency matters more than quantity. A thin layer applied daily will do more than a thick glob used occasionally. If you’re pregnant or gaining weight for another reason, starting early and applying to the abdomen, hips, thighs, and breasts before stretch marks appear gives you the best chance of reducing their severity. Pairing this with gradual weight changes, staying hydrated by drinking enough water, and eating a diet rich in vitamins C and E also supports the skin’s natural elasticity from the inside out.
One practical note: Vaseline is greasy. Many people prefer to apply it at night and wear older clothes or use a towel over their sheets. During the day, a lighter moisturizing lotion can serve a similar (though less powerful) occlusive function without the slick feeling.
Setting Realistic Expectations
No topical product eliminates stretch marks entirely. Stretch marks are a form of scarring that occurs in the dermis, the middle layer of skin that topical products can only influence indirectly. Vaseline can make stretch marks less noticeable by improving skin texture, boosting hydration, and supporting the healing process during the early stages. Over months of consistent use, you may notice that marks look smoother and blend more with surrounding skin.
If your stretch marks bother you significantly and moisturizing alone isn’t producing the results you want, professional treatments offer more dramatic improvement. But as a daily, affordable starting point, Vaseline does exactly what your skin needs most: it holds in moisture and gives your skin a better environment to heal.