The question I get asked most on outdoor shoots has nothing to do with foundation. It is whether SPF is going to wreck the makeup, and the honest answer is that it can, if you use the wrong one or apply it in the wrong order. That is worth solving, because skipping it is not a real option.
In Short
- Look for SPF 30 or higher plus a high UVA rating, not just a big number on the front.
- Most people apply far too little. Around a teaspoon covers the face and neck properly.
- Reapply every two hours outdoors, and after swimming, sweating or towelling dry.
- UV gets through cloud, so a grey British day is not a day off.
What the label is actually telling you
SPF measures protection against UVB, the wavelength responsible for burning. It says nothing at all about UVA, which penetrates deeper and is the one associated with long-term ageing changes in the skin. That is why the second marking matters.
On products sold here, UVA protection appears either as a star rating or as the letters UVA inside a circle. Official UK advice is to look for at least SPF 30 together with a high UVA rating, typically four stars or more. A bottle labelled SPF 50 with no UVA marking is doing half a job.
The jump between SPF numbers is smaller than the packaging implies. SPF 30 filters roughly 97 per cent of UVB and SPF 50 around 98 per cent, so the difference between them is real but modest. How much you apply and how often you reapply changes your actual protection far more than moving up a number.
Mineral or chemical, and which suits your skin
Both types work. They simply get there differently, and the choice comes down to your skin and what you are wearing over it.
| Mineral | Chemical | |
|---|---|---|
| Key filters | Zinc oxide, titanium dioxide | Avobenzone, oxybenzone and similar |
| Texture | Thicker, can leave a white cast | Lighter, absorbs invisibly |
| Suits | Sensitive and reactive skin | Oily skin, anyone who hates cast |
| Under makeup | Can grip and pill under foundation | Usually smoother to work over |
Beyond the filters, match the base to your skin. A moisturising formula for dry skin, something labelled non-comedogenic for skin that congests easily, and a water-resistant version if the day involves swimming or serious heat. A sunscreen you dislike wearing is a sunscreen you will skip, and that matters more than the chemistry.
How much, and how often
Under-application is the single biggest reason sunscreen underperforms. The protection printed on the bottle is measured using a specific quantity, and most of us use nowhere near it.
- Face and neck: around a teaspoon. If that sounds like a lot, that is rather the point.
- Whole body: six to eight teaspoons for an adult, which is why a small tube lasts one beach day rather than a season.
- Timing: apply half an hour before you go out, then again just before you leave.
- Reapplication: every two hours outdoors, and immediately after swimming, sweating or drying with a towel.
- The forgotten bits: ears, the back of the neck, the hairline parting, the tops of the feet and the backs of the hands.
Timing your day helps as much as any product. UV is strongest in the middle of the day, and the standard UK advice is to seek shade between eleven and three from March to October. Sunscreen was never designed to be the only thing between you and a full afternoon outdoors, so a hat, a long sleeve and ten minutes under a tree are part of the routine rather than an admission of defeat.
Making it work under makeup
This is the part of my job that transfers most usefully. Order matters: skincare, then sunscreen, then a pause, then makeup. Giving it two or three minutes to settle prevents most of the pilling people complain about, and it is the step everyone skips when they are late.
Fluid or serum-textured sunscreens sit under foundation far better than rich creams, and a mineral formula that grips will drag a liquid base straight off the skin. If you are prone to pilling, apply the sunscreen with flat palms pressing down rather than rubbing in circles.
For reapplying over a finished face, a powder or stick SPF is the practical answer. Neither will give you the same coverage as a proper layer of cream, so treat them as maintenance on a day mostly spent indoors rather than as protection for an afternoon in a garden.
What people still get wrong
- Deeper skin tones need it too. Melanin offers some natural protection, but not complete protection, and sun damage affects every skin tone.
- Cloud is not a filter. You can burn on an overcast day in the UK, and water, sand and snow all bounce extra UV back at you.
- One morning application is not a day’s protection. Nothing on the market lasts from breakfast to evening without reapplying.
- SPF in foundation is a bonus, not a plan. Nobody applies makeup thickly enough to reach the tested level of protection.
- Last summer’s bottle is questionable. Check the date and the period-after-opening symbol, and replace anything that has separated or changed smell.
Questions I get asked about SPF
Do I really need sunscreen in winter?
Daily use through the darkest months is less critical than in summer, but UVA is present year-round and passes through window glass. If you spend real time outdoors or beside a window, keeping it in the routine is sensible.
Will sunscreen give me spots?
Not automatically. If your skin congests easily, look for non-comedogenic formulas and lighter fluid textures, and remove it properly at the end of the day. Many people find mineral filters with zinc oxide sit more comfortably on breakout-prone skin.
How do I remove it properly?
Water-resistant and mineral formulas need more than a splash of water. A cleansing balm or oil first to break down the product, then a gentle second cleanse, is the routine that stops residue building up over a summer.
Does sunscreen block vitamin D completely?
Everyday use does not appear to leave people deficient, since incidental exposure still happens. If you have concerns about your vitamin D levels, that is a conversation for your GP rather than something to solve by skipping protection.
This article is general information about skincare, not medical advice. If you have a mole that is changing, a patch of skin that will not heal, or any concern about sun damage, see your GP or a dermatologist rather than relying on an article.
Which SPF actually works under your makeup?
This is the one product recommendation I am always hunting for, so tell me what sits well on your skin in the comments.