A handful of plant oils show genuine promise for reducing stretch marks, but not all popular options live up to their reputation. Sweet almond oil, rosehip oil, and oils containing Centella asiatica extract have the strongest evidence behind them, while some widely used options like olive oil and cocoa butter have failed to outperform placebos in clinical trials. The key factors are what’s in the oil, how you apply it, and how long you stick with it.
Oils With the Strongest Evidence
Sweet almond oil is one of the best-studied options. A large meta-analysis covering 12 studies and nearly 2,000 women found that herbal treatments including sweet almond oil, sesame oil, and aloe vera gel significantly reduced the incidence of stretch marks compared to placebo. The effect was meaningful: women using these treatments had roughly half the odds of developing stretch marks. Almond oil is rich in vitamins D and E and helps maintain skin elasticity and hydration, which are the two things stretch marks disrupt most.
Rosehip oil stands out for a different reason. It naturally contains trans-retinoic acid, the same active compound found in prescription retinoid creams that dermatologists use for skin renewal. This gives rosehip oil a mild resurfacing effect that can improve skin texture over time. It won’t match the potency of a prescription retinoid, but it offers a gentler alternative, especially for people who can’t use retinoids (more on that below).
Products containing Centella asiatica extract have some of the most detailed research behind them. In lab and clinical testing, this plant extract increased collagen fiber density in stretch-marked skin by 49% and boosted elastin production by 37%. It works on multiple fronts: reorganizing the chaotic collagen bundles that form in stretch marks, promoting elastic fiber growth, and reducing the fibrotic scarring process that makes marks permanent. After four weeks of use, skin thickness, elasticity, and vascularization all improved significantly compared to placebo. You’ll find Centella asiatica listed on product labels as “cica,” “tiger grass,” or “madecassoside.”
Oils That Help With Skin Elasticity
Argan oil doesn’t have stretch mark-specific trials, but it has solid evidence for improving the underlying problem: lost skin elasticity. In a 60-day study of postmenopausal women, daily topical application of argan oil significantly improved all three clinical measures of skin elasticity. Since stretch marks form when skin stretches faster than its elastic fibers can accommodate, maintaining elasticity is a core prevention strategy. Argan oil is also lightweight and absorbs well, making it practical for daily use on the abdomen, hips, and thighs.
Sesame oil appeared alongside sweet almond oil in the meta-analysis showing reduced stretch mark incidence. It’s a rich carrier oil with anti-inflammatory properties that may help calm the redness and itching that often accompany new stretch marks.
Popular Oils That Don’t Work Well
Olive oil is one of the most commonly used home remedies for stretch marks, but the clinical evidence is discouraging. A Cochrane systematic review, the gold standard for medical evidence, found no statistically significant difference in stretch mark development between women who used olive oil and those who used nothing at all. The review was blunt in its conclusion: based on available evidence, it is not possible to recommend olive oil for stretch mark prevention.
Cocoa butter tells a similar story. Despite being the second most popular product used by pregnant women for stretch marks (after Bio-Oil), two randomized controlled trials found no significant difference between cocoa butter and placebo. Pure vitamin E oil also lacks direct evidence for treating stretch marks. While vitamin E has antioxidant properties and supports the skin barrier, no clinical trials have demonstrated that applying it alone improves existing marks.
This doesn’t mean these oils are useless for skin health. Keeping skin moisturized can reduce itching and discomfort. But if your goal is preventing or fading stretch marks specifically, the evidence points elsewhere.
How to Apply Oils for Best Results
The massage matters almost as much as the oil itself. In a study of 141 pregnant women, stretch marks developed in only 20% of those who applied bitter almond oil with massage, compared to 38.8% who applied the oil without massage and 41% in the control group. The massage likely increases blood flow and helps the oil penetrate deeper into the skin.
If you’re using essential oils like lavender, neroli, or bitter orange (sometimes recommended for skin repair), always dilute them in a carrier oil first. A safe ratio is 15 to 30 drops of essential oil per ounce of carrier oil. Start at the lower end and increase only if your skin tolerates it well. Do a patch test on a small area and wait 24 hours before applying broadly.
Apply twice daily to areas prone to stretching: the abdomen, breasts, hips, thighs, and lower back. Consistency over months is what produces results, not heavy application in a single session.
How Long Before You See Results
Stretch mark treatments work slowly. In a clinical study of an oil formulation containing plant extracts and vitamins, participants saw a 29% improvement in stretch mark appearance at two months and a 71% improvement at four months of twice-daily use. Skin hydration followed the same pattern, increasing by 25% at two months and 71% at four months. Redness decreased by 15% and 30% at those same checkpoints.
Most clinical trials run for 12 weeks minimum before measuring outcomes. Skin cell turnover takes roughly four to six weeks per cycle, so you need several cycles before the deeper structural changes in collagen and elastin become visible on the surface. Plan on at least three to four months of consistent use before judging whether a product is working.
Newer, red or purple stretch marks (called striae rubrae) respond much better to topical treatment than older, white or silver marks (striae albae). The earlier you start treating them, the more improvement you can expect.
Safety During Pregnancy
Most plant-based carrier oils are considered safe during pregnancy. Sweet almond oil, argan oil, and coconut oil are widely used by pregnant women without reported issues. Bio-Oil is the single most popular product in this category, used by about 61% of women in one large survey, followed by cocoa butter products at roughly 40%.
The major ingredient to avoid during pregnancy is retinoids in any form. While rosehip oil contains naturally occurring trans-retinoic acid, the concentration is far lower than prescription retinoids. Still, if you’re pregnant or planning to become pregnant, it’s reasonable to choose other options like sweet almond or argan oil instead. Prescription tretinoin cream is definitively off-limits during pregnancy, even though studies show it can reduce stretch mark length by 20% over 12 weeks in non-pregnant users.
Essential oils require more caution during pregnancy. Some, like clary sage and rosemary, can stimulate uterine contractions. If you want to add essential oils to your carrier oil during pregnancy, stick to ones with established safety profiles like lavender and chamomile, and use the lower end of the dilution range.