80%+ of pregnant women develop stretch marks — they also appear during puberty, rapid weight gain, and muscle growth from training
Striae rubra Red/purple stretch marks respond significantly better to all treatments compared to mature white marks — the treatment window matters
2024 Systematic review in Clinical Dermatology: combination therapies (microneedling + PRP or laser) show superior outcomes to any single treatment

What stretch marks actually are

A stretch mark forms when skin is pulled faster than it can adapt. The dermis — the middle layer — tears, and collagen and elastin fibres rupture. The result is initially a reddish or purple streak (striae rubra), as blood vessels close to the surface show through the thin, disrupted tissue. Over months to years, those vessels contract and the mark fades to silver-white (striae alba).

The distinction between rubra and alba matters more than almost anything else when it comes to treatment. Fresh, red stretch marks still have active inflammation and remodelling potential — treatments that stimulate collagen can meaningfully change the outcome. Old white marks have finished their remodelling phase. They can be improved, but the effect sizes are smaller across every treatment category.

Genetics play a significant role in who gets stretch marks. Skin elasticity, collagen production rates, and the speed of growth or change all vary substantially between individuals. Vitamin C and protein status also affect how well your skin handles rapid stretching — though no supplement has been shown to prevent stretch marks reliably.

What the evidence supports

Tretinoin works for fresh stretch marks. A landmark study found that 0.1% tretinoin applied nightly for 24 weeks produced significant improvement in striae rubra — reducing both length and width. For mature white marks, the same study showed little improvement: more cases showed no response than partial response. Tretinoin is not safe during pregnancy and should not be used while pregnant or breastfeeding.

Microneedling creates thousands of micro-channels in the skin, triggering a controlled wound-healing response that stimulates new collagen and elastin deposition. Multiple clinical trials and a 2024 systematic review in Dermatologic Surgery confirm meaningful improvement across skin types. It works on both rubra and alba, though results are better on the former. Combining microneedling with PRP (platelet-rich plasma) appears to enhance outcomes further.

Research note

A 2024 systematic review of therapeutic modalities for striae across skin types found combination approaches consistently outperformed monotherapy. Fractional CO2 laser combined with microneedling or PRP produced the most significant improvements for mature white marks. For fresh stretch marks, tretinoin plus microneedling is the combination with the strongest evidence profile.

The prevention question

No topical product has convincing evidence for stretch mark prevention. Cocoa butter, bio-oil, vitamin E oil, almond oil — all are frequently marketed to pregnant women, and all have failed to show consistent benefit in controlled studies. A 2012 Cochrane review found no evidence that topical preparations prevent striae gravidarum.

This isn't a reason to avoid moisturising during pregnancy — keeping skin hydrated and supple is sensible, and itching from stretching skin is a real comfort issue. But if you're applying bio-oil nightly and expecting it to prevent marks, the evidence doesn't support that expectation.

Practical tip

If you notice new stretch marks while they're still pink or red, that's the window to act. Microneedling is safe for most skin types and available at dermatology clinics. If you want a topical-only approach, look for products containing retinol (not tretinoin in pregnancy), hyaluronic acid, and centella asiatica — which has some supporting data for improving skin elasticity and early striae.

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Getting the right treatment

A dermatologist or aesthetic doctor can assess the stage of your stretch marks and match the treatment accordingly. For red marks, tretinoin or microneedling are strong starting options. For white marks, fractional laser or radiofrequency microneedling offers the best evidence. Over-the-counter products can support skin health but won't replace clinic-based treatments for meaningful improvement.

Medical disclaimer: This article is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional before making changes to your health routine.

References

  1. Ud-Din S, et al. A systematic review of the treatment of striae distensae. Dermatologic Surgery. 2024. Link
  2. Rangel O, et al. Topical tretinoin 0.1% for pregnancy-related abdominal striae. International Journal of Dermatology. 2001;40(1):52–56. PubMed
  3. Brennan M, et al. Stretch marks during pregnancy: a review. British Journal of Dermatology. 2012.
  4. Elsaie ML, et al. Advancements in treating stretch marks. PMC. 2025. PMC