Freckles, sun spots and uneven tone: what skincare can and cannot do

The usual question is a simple one. Can a cream fade the spots on my face? The short version is that some products can soften how uneven tone looks, slowly and modestly, and that the largest changes in the published research come from prescription medicines and in-clinic devices rather than anything sold in a jar. Before any of that, there is something more important.

Get any spot you are unsure about looked at first

New Zealand and Australia have the highest melanoma incidence and mortality rates in the world. That comes from a study comparing 40 years of national mortality data across both countries, which found melanoma mortality rose in both sexes in both countries between 1968 and 2007, and rose more in New Zealanders, women in particular (Sneyd et al., 2013).

So the first rule with any spot on your skin is this. If it is new, if it is changing, if it is asymmetric, if the border is ragged, if there is more than one colour in it, if it is wider than about 6 mm, or if it itches or bleeds, book your GP or a skin check clinic. Those points are the ABCDE guide, which a review in JAMA expanded from ABCD by adding E for Evolving, meaning any change over time in size, shape, colour, surface or symptoms (Abbasi et al., 2004).

Two things about that list. It is a prompt to get seen, not a way to diagnose yourself at the bathroom mirror. And a small spot is not automatically fine. The same review kept the 6 mm guide while noting that melanomas smaller than 6 mm do occur, so if something looks off to you, that on its own is reason enough to get it checked.

No skincare product, ours or anyone else's, can tell you what a spot is, and nothing on a shelf is an alternative to that appointment. If you are unsure about a spot, get it looked at first and think about its appearance second. Anyone with a family history of melanoma, a lot of moles, a history of bad sunburn, or fair skin that burns easily should be having regular professional skin checks whatever their tone looks like. That sits completely apart from any skincare routine.

Freckles and sun spots are not the same thing

• Freckles usually appear early in life, tend to run in families, sit more often on fairer skin, and darken with sun exposure. They are largely inherited.
• Sun spots, the flat brown patches on hands, chest, shoulders and cheeks, build up over years of UV exposure. Dermatology research describes them as an early visible sign of sun related skin ageing (Mardani et al., 2025).

Worth saying plainly. There is nothing wrong with freckles, and nothing cosmetic will change inherited freckling. Wanting a more even look is a preference rather than a health need, and either choice is fine.

The habit with the best evidence behind it

If you only change one thing, change how you use sunscreen. In a randomised community trial in Nambour, Queensland, 903 adults under 55 were assigned either to daily broad spectrum sunscreen or to using it at their own discretion. The daily group showed no detectable increase in skin ageing over four and a half years, and 24 per cent less ageing than the discretionary group (Hughes et al., 2013).

Read that one carefully, because it is often stretched. What the assessors graded was photoageing measured from skin surface texture, not the number of spots on anyone's face. So it is good evidence for daily sun protection as a habit. It is not evidence that sunscreen fades pigmentation you already have.

Two caveats we should be straight about. Nambour sits at 26 degrees south and Auckland at about 37, so take the direction of the finding rather than the exact percentage. And sunscreen is not permission to stay out longer. Shade, timing and covering up still do most of the work in a New Zealand summer.

How much you apply matters more than the number on the bottle

Laboratory SPF is measured at 2 mg per square centimetre. When a multicentre study tested three commercial sunscreens at 0.5, 1.0 and 2.0 mg per square centimetre across three test centres, the measured SPF fell in a straight line with the quantity applied (Bimczok et al., 2007). Spread it thinner and you get proportionally less than the number on the label.

The practical version is simple. A generous layer each morning, topped up through the day, does more for you than swapping SPF 30 for SPF 50 and spreading it thin. Pick a broad spectrum formula you like enough to wear daily. A day moisturiser with SPF in it, like Medik8 Advanced Day Ultimate Protect, tends to get worn more often than a heavy sunscreen that stays in the drawer.

What the research shows for creams and serums

The strongest topical evidence for the look of sun spots is for prescription tretinoin. In a randomised, double blind trial, 58 people completed 10 months of either 0.1 per cent tretinoin or the same cream without the active ingredient. Among those with facial spots, 20 of 24 on tretinoin, or 83 per cent, showed lightening, against 8 of 28, or 29 per cent, on the vehicle cream, and biopsies showed less pigment in the upper skin layers (Rafal et al., 1992). Two things follow from that. It is a prescription medicine used under a doctor's supervision, and we do not sell or supply it. The timescale is also months rather than a fortnight.

On the cosmetic side, the clearest trial we have found is for niacinamide. Women aged 40 to 60 used either an SPF 15 lotion each morning and a cream each evening, both containing 4 per cent niacinamide and 2 per cent N-acetyl glucosamine, or the same two products without those ingredients. After eight weeks of use, the active group showed a greater reduction in the appearance of irregular facial pigmentation, across 202 women in total (Kimball et al., 2010). The change was measured largely by photography and image analysis, the trial ran eight weeks, and it tested one specific commercial formulation. Take it as evidence of a modest, measurable difference in appearance rather than a dramatic one.

You will also see arbutin, kojic acid, liquorice root and vitamin C sold for uneven tone. We are not going to give you numbers for those, because we have not found trials on them of the size and quality of the two above. That does not make them useless. It means we cannot honestly tell you what to expect.

What we are not claiming

• No product can tell you what a spot is. Using a cream to monitor or wait out a spot you are unsure about is the one genuinely risky thing on this page.
• Cosmetic retinol is not tretinoin. The 1992 result used a prescription medicine at 0.1 per cent. Retinol sold in cosmetics is a different, weaker form, and that trial did not test it. Anyone telling you the two are equivalent is going past the evidence.
• Nothing cosmetic removes inherited freckling.
• Pigmentation that appears in pregnancy or with hormonal contraception is a matter for your doctor. We make no claims about it.
• Beta carotene supplements had no overall effect on skin ageing in the same Queensland trial (Hughes et al., 2013). We have not found comparable evidence for other supplements in either direction.

If one particular spot is what bothers you

A systematic review of 41 clinical trials covering 3,234 patients aged 24 to 92 gathered the reported clearance rates for sun spots (Mardani et al., 2025). Intense pulsed light came in at 74.6 to 90 per cent and picosecond laser at 67.9 to 93 per cent. The most effective topical in the review was a prescription combination of mequinol 2 per cent with tretinoin 0.01 per cent, at 52.6 per cent to over 80 per cent, so the gap between devices and the best prescription topical is narrower than it is often made to sound. Trichloroacetic acid peels came in lowest, at 12 to 46 per cent.

The authors are careful here and so should we be. Those are ranges across small and variable trials rather than one pooled figure, and the review calls for larger randomised trials before anyone draws firm conclusions. Most reported side effects were mild and short lived, though cryotherapy was linked to more severe ones, while pulsed dye and intense pulsed light were less often associated with pigmentation appearing after treatment. Any of these belongs with a qualified practitioner who has looked at your skin in person.

It is still useful to know all of that before spending heavily on serums expecting device level change. And since sun spots build up from UV exposure over years, sun protection is the part that keeps mattering whatever else you do.