In short
While SPF measures UVB (sunburn), PA measures UVA (aging, melasma, and persistent pigment darkening). PA+++ offers a PPD score of 8–16 (high UVA defense), while PA++++ provides a PPD score greater than 16 (extremely high UVA defense). For South Asian skin prone to hyperpigmentation, always choose PA++++ to prevent melanin overproduction and deep collagen breakdown.
বাংলায়SPF যেখানে UVB (রোদে পোড়া) মাপে, PA রেটিং মাপে UVA (মেছতা, কালচে দাগ ও চামড়া কুঁচকানো)। PA+++ মাঝারি-উচ্চ সুরক্ষা দেয়, আর PA++++ দেয় সর্বোচ্চ UVA প্রতিরোধ। এশিয়ান ত্বকে দাগ এড়াতে PA++++ সানস্ক্রিন বেছে নেওয়া অপরিহার্য।
UVA rays make up 95% of ultraviolet radiation reaching Earth's surface. Unlike UVB, UVA rays penetrate clouds, window glass, and pass deep into the dermis. In Bangladesh, UVA is the primary catalyst for melasma, tanning, and breakdown of collagen elastin fibers.
Ingredients in this guide
What the key ingredients in these products actually do.
Sources
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Questions people ask
What does PA++++ mean on sunscreen?
What does PA++++ mean on sunscreen?
PA++++ indicates the highest grade of UVA protection recognized by international Japanese and Korean cosmetic standards, equivalent to a Persistent Pigment Darkening (PPD) factor of 16 or greater.
Skinoly editorial team
Our guides are written for Bangladesh's climate and prices, and only name ingredients that are on the product's own label. Prices on this page update automatically.
General skincare information, not medical advice. See a dermatologist for persistent or painful skin problems.
