Sun Block From a Hakeem: How to Judge Any Sunscreen by Its Label
Forget the brand on the front. Turn the bottle around, and three things on the back tell you almost everything worth knowing.
Quick facts
- The habit: reading a sunscreen label properly before buying, instead of trusting packaging claims.
- The anchor: at the shop counter or before adding to cart online, read before you pay.
- What to look for: SPF number, broad spectrum or PA rating, and a texture you will tolerate daily.
- The amount that matters: about two finger-lengths for the face alone, regardless of brand or price.
- What a high price does not guarantee: better protection than an honestly labelled cheaper one.
Prefer to listen? This post as a 2 min video
Why this is a buying skill, not a brand recommendation
Every shelf has ten sunscreens claiming to be the best one, and every claim on the front of the bottle is written by marketing, not by a lab. The genuinely useful information sits on the back, in small print, and it is the same three or four things regardless of whether the bottle costs 400 rupees or 4,000. Learn to read that print once, and you can judge any sunscreen you are ever handed, without needing anyone’s brand recommendation, including ours.
SPF: what the number actually buys you
SPF measures protection against UVB rays, the ones mainly responsible for sunburn. SPF 30 blocks about 97 percent of UVB when applied correctly and at the correct amount; SPF 50 blocks about 98 percent. The jump from 30 to 50 is smaller than the marketing suggests, but SPF 50 does buy you a bit more margin for error, since most people under-apply anyway. For daily use in South Asian sun, SPF 30 or higher, applied properly, is a sound baseline; SPF 50 is a reasonable upgrade if you are outdoors for long stretches.
Broad spectrum and PA rating: the part people skip
SPF alone says nothing about UVA protection, and UVA rays are the ones behind tanning, pigmentation and premature ageing, plus they penetrate glass and clouds when UVB is blocked. Look for the words “broad spectrum” on the label, which means the product covers both UVA and UVB. Many Asian-market sunscreens also carry a PA rating (PA+, PA++, PA+++, PA++++), where more pluses mean stronger UVA protection. For everyday use, PA+++ or higher paired with broad spectrum SPF 30 to 50 covers both fronts properly. A high SPF with no broad spectrum label and no PA rating is protecting you from sunburn while doing very little for pigmentation, which matters a great deal for melasma-prone South Asian skin; we cover that specific problem in melasma and sunscreen.
Texture and finish: the honest reason people skip sunscreen
The best sunscreen on paper is useless if it sits in the cupboard because it feels sticky, leaves a grey cast, or makes your face shine like a griddle by noon. In hot, humid weather, a gel or fluid finish (often labelled “matte” or “water-based”) tends to sit better than a thick cream. Drier climates and winter tolerate creamier formulas fine. If you have tried three sunscreens and abandoned all three for how they feel, the answer is trying a different texture category, not giving up on sunscreen altogether.
- Check the front for “broad spectrum” and an SPF of at least 30.
- Check for a PA rating; PA+++ or higher is a solid daily target.
- Check the ingredient or texture description (gel, fluid, cream, matte) against your skin type and climate.
- Check the price per 50 ml against your budget; do not assume higher price means higher protection.
- At home, apply about two finger-lengths for the face alone (roughly a quarter teaspoon), plus a separate finger-length for neck and ears.
- Reapply every 2 hours outdoors, and immediately after sweating heavily, swimming, or towel drying.
| Label term | What it tells you |
|---|---|
| SPF 30 / SPF 50 | UVB protection level; both are good daily choices when applied at full amount |
| Broad spectrum | Covers UVA as well as UVB; look for this alongside SPF, not instead of it |
| PA+++ / PA++++ | Strength of UVA protection specifically; more pluses is stronger |
| Water resistant (40 or 80 min) | How long it holds up to sweat or water before reapplication is needed |
Myth: a natural or ayurvedic oil is “sunscreen”
Coconut oil, sesame oil and similar traditional oils have been used on skin for centuries, and they do offer very mild, unreliable UV filtering, nowhere near enough to prevent sunburn or protect against pigmentation on their own. Do not substitute them for a properly labelled sunscreen with a tested SPF, especially for children, fair or sun-sensitive skin, or extended time outdoors. They are fine as a moisturiser underneath sunscreen, not instead of it.
Ubtan and traditional oil-based skincare in South Asian households focused on nourishment and gentle exfoliation, described in old practice as balancing the skin, not on blocking ultraviolet light, which was not a concept available to that tradition. Treat the two as separate jobs: traditional care for texture and nourishment, a labelled sunscreen for actual sun protection.
If you have very sensitive or acne-prone skin, patch test any new sunscreen on your inner arm for 48 hours before applying it to your face; see our guide on how to patch test at home. People using retinoids, AHAs or other prescription skin treatments should ask their dermatologist about sunscreen choice, since these treatments increase sun sensitivity significantly. Children under 6 months should be kept out of direct sun rather than relying on sunscreen; for older babies, use a plain, fragrance-free mineral sunscreen and ask a paediatrician first. Any mole, patch or spot that changes shape, colour or size needs a doctor’s look regardless of how diligent your sunscreen habit is.
Who does not need to overthink this
If you already have a sunscreen you tolerate well, reapply consistently, and it carries SPF 30 or higher with broad spectrum labelling, you do not need to keep shopping for something better; consistency with a decent product beats an unused “perfect” one every time.
Try this at the shop
Before your next purchase, ignore the front of the bottle entirely for thirty seconds and read only the back. If it says broad spectrum, SPF 30 or higher, and a texture you can imagine using daily, it has passed the real test.
Once you have chosen one, our piece on the daily sunscreen habit and the two finger rule covers applying it properly every single day. More small routines worth building are in our Tiny Habits series.
Is a higher SPF always better?
Not by much in practice. SPF 30 and SPF 50 both offer strong protection when applied at the correct amount; the bigger factor is usually under-application, not the number on the bottle.
What does PA rating mean on a sunscreen?
It measures UVA protection strength, shown as PA+ through PA++++. More pluses means stronger UVA protection, which matters for pigmentation and ageing, separate from SPF’s UVB protection.
Do expensive sunscreens work better than cheap ones?
Not necessarily. Price often reflects texture, packaging and brand, not protection level. A well-labelled cheaper sunscreen applied correctly can outperform an expensive one used sparingly.
Can I use body sunscreen on my face?
You can, but body formulas are often thicker and more likely to clog facial pores. A separate, lighter facial sunscreen is usually more comfortable for daily use.