What Is the PA Rating in Sunscreen and How High Should It Be?

Most people buying sunscreen in India check one thing on the label: the SPF number. SPF 30, SPF 50, SPF 50+ — the higher the better, right? But there is a second rating on almost every sunscreen bottle that most people walk past without a second glance. The row of plus signs sitting quietly next to the letters "PA."

PA+, PA++, PA+++, PA++++ — it looks like a typo or a design quirk. But this rating is, arguably, more important for Indian skin than SPF. It is the only number on the label that tells you how well your sunscreen protects against the rays that cause tanning, dark spots, and premature ageing. And for Indian skin, those are exactly the concerns that matter most.

Here is everything you need to know about PA ratings — clearly, simply, and without the jargon.

Quick Answer

The PA rating in sunscreen measures protection against UVA rays — the rays responsible for tanning, pigmentation, and skin ageing. PA stands for Protection Grade of UVA, and it uses plus signs to indicate strength: PA+ offers some protection, PA++ moderate, PA+++ high, and PA++++ extremely high. For Indian skin and India's year-round sun, PA+++ or PA++++ is recommended for daily use alongside a high SPF.

What Does PA Stand For?

PA stands for Protection Grade of UVA. It was developed in Japan as a standardised way to communicate how effectively a sunscreen defends against UVA radiation — something the SPF number alone cannot tell you.

The PA system is based on a measurement called PPD — Persistent Pigment Darkening — which measures how much UVA exposure is required to cause visible skin darkening (tanning or pigmentation). The higher the PPD value, the stronger the UVA protection.

PA ratings map to PPD values as follows:

This is the system widely used across Asian sunscreen markets, including India — and it is far more specific than the "broad spectrum" label used in the US, which only confirms UVA protection is present without indicating how much.

PA Rating vs SPF: What Is the Difference?

SPF and PA ratings measure completely different things. Using one without the other gives you incomplete sun protection.

A sunscreen with a very high SPF but a low PA rating will protect you from burning but not from tanning, pigmentation, or the deeper ageing effects of UVA. For Indian skin — where tanning and post-inflammatory pigmentation are among the most common and persistent skin concerns — the PA rating is not optional. It is essential.

Why the PA Rating Matters More for Indian Skin

Indian skin sits predominantly in the Fitzpatrick skin type III–V range — meaning it has a higher melanin content than lighter skin tones. This offers some natural protection against sunburn (UVB), but it creates a very different and important trade-off:

• Higher melanin = higher UVA sensitivity for pigmentation. The melanin-producing cells (melanocytes) in Indian skin are more reactive to UVA stimulation, which is why tanning and dark spots develop faster and sit deeper.
• UVA damage is silent. There is no burning sensation, no immediate redness — just slow, cumulative pigmentation and ageing that appears weeks or months after the exposure event.
• Post-inflammatory hyperpigmentation (PIH) — a common concern in Indian skin — is worsened by UVA exposure, which means any unprotected skin is at compounded risk.

This is precisely why dermatologists recommend at minimum PA+++ for daily use on Indian skin, and PA++++ for periods of extended outdoor exposure or for people already managing hyperpigmentation and tanning concerns.

How High Should Your PA Rating Be?

Here is a practical guide based on lifestyle and exposure:

The short answer for most people: PA+++ is your everyday minimum. PA++++ is worthwhile if you spend significant time outdoors, are already dealing with hyperpigmentation, or want the highest available daily protection.

Skinaa Aqua Sunscreen Gel carries a PA+++ rating alongside SPF 50+, making it suited to the daily protection needs of Indian skin across most lifestyle contexts — indoors near windows, commuting, or urban outdoor use — in a lightweight gel that sits comfortably even in humid conditions.

Does a High PA Rating Affect Sunscreen Texture or Feel?

A common concern: does choosing PA++++ mean you are stuck with a heavy formula? The answer is no.

PA ratings reflect the concentration and efficacy of UVA-filtering ingredients — not the weight or texture of the formula. A well-formulated gel sunscreen can carry a high PA rating while remaining lightweight, non-greasy, and comfortable for daily wear.

What matters is how the UVA-filtering ingredients are incorporated into the base — not the base itself. This is why checking both the PA rating and the texture type gives you the complete picture when choosing a sunscreen.

How to Read a Sunscreen Label Completely

Using everything in this blog and the broader cluster, here is a complete checklist for reading a sunscreen label before purchase:

• SPF 50+ — confirms high UVB protection (~98% of UVB blocked)
• PA+++ or PA++++ — confirms high to extremely high UVA protection
• Broad-spectrum — confirms coverage across both UVA and UVB wavelengths
• Gel base — suited to oily, combination, and humid-climate skin types
• Hyaluronic Acid — hydration without added oil
• Niacinamide — supports tone balance and sebum regulation
• Blue light / HEV protection — relevant for screen-heavy daily life

A sunscreen that checks all of these is genuinely doing its job for Indian skin.

Pro Tip: If a sunscreen label does not include a PA rating at all, it may only be giving you SPF-tested UVB protection with no clear measure of UVA coverage. In India's sun conditions, a labelled PA rating — PA+++ at minimum — is a non-negotiable marker of a complete sunscreen.

Myth vs Fact

• Myth: "SPF is the only number that matters on a sunscreen label." Fact: SPF measures only UVB protection. The PA rating measures UVA protection — which is directly responsible for tanning, pigmentation, and premature ageing in Indian skin.

• Myth: "PA++++ is overkill for everyday use." Fact: For anyone managing hyperpigmentation, spending regular time outdoors, or simply wanting the most complete daily protection available, PA++++ is a practical and well-justified choice.

• Myth: "If the sunscreen says 'broad spectrum,' the PA rating doesn't matter." Fact: "Broad spectrum" confirms some UVA coverage but doesn't tell you how much. The PA rating gives you the actual protection level — PA+ and PA++++ are both technically "broad spectrum" but offer very different UVA defence.

Common Mistakes to Avoid

• Buying sunscreen based on SPF alone and ignoring the PA rating entirely
• Assuming "broad spectrum" and "high PA" mean the same thing
• Choosing PA++ and assuming it is sufficient for Indian outdoor sun exposure
• Not checking the PA rating separately for summer and monsoon purchases
• Believing a sunscreen without a PA label offers adequate UVA protection

Quick Takeaways

• PA = Protection Grade of UVA — the only sunscreen rating that tells you how much UVA protection you are getting.
• The scale runs from PA+ (some) to PA++++ (extremely high).
• PA ratings are based on PPD measurements — the higher the PPD, the more UVA is blocked.
• PA+++ is the daily minimum for Indian skin; PA++++ is ideal for outdoor activity and pigmentation management.
• SPF covers UVB. PA covers UVA. You need both for complete sun protection.

Conclusion

The PA rating is not a decoration on a sunscreen bottle. It is the one number that tells you whether your sunscreen is actually protecting you from tanning, dark spots, and the slow, invisible ageing that UVA causes every single day.

For Indian skin facing strong, year-round sun and a high natural tendency toward pigmentation, PA+++ or higher is not optional — it is the baseline. The next time you pick up a sunscreen, flip it over, find the PA rating, and make sure those plus signs earn their place on the label.

If you want a daily sunscreen that combines SPF 50+ with PA+++ broad-spectrum protection in a lightweight gel built for Indian skin and climate, explore Skinaa Aqua Sunscreen Gel — complete protection, without the heaviness.