Summary: This is a calculated ranking of sunscreens based on upvoted comments on reddit.

Approach: We combed through 20+ reddit threads (e.g. 'holy grail' threads) and identified comments that recommended specific sunscreens. We focused on comments that had at least a net +30 upvotes. Sometimes, one comment might recommend 2 products - the net upvotes were split between those two comments.

• Rank 1 (637 upvotes): Biore UV Aqua Rich Water Essence OR Biore UV Aqua Rich Watery Gel
• Rank 2 (418 upvotes): Beauty of Joseon Relief Sun: Rice + Probiotics
• Rank 3 (366 upvotes): SKIN1004 Madagascar Centella Hyalu-Cica Water-Fit Sun Serum
• Rank 4 (274 upvotes): La Roche-Posay Invisible Fluid Sunscreen
• Rank 5 (222.5 upvotes): Round Lab Birch Juice Moisturizing Sunscreen

Note 1: Many of the upvotes and comments praised both the essence and the gel. There were many references to the 'moisture milk' version of the product as well, but that is no longer available in most places]

Note 2: Most of the comments simply referred to this as 'boj' or beauty of joseon

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Raw Data

Request for Help: If you find Reddit threads that have overwhelming recommendations for a particular product, please send it to us at reddit.beauty.reviews@gmail.com

Thread: Sun Care: Rating Every Sunscreen (30+)

• SkinAqua Super Moisture Milk, and DRMTLGY Physical Tinted Moisturizer SPF 44 (32 upvotes)

Thread: Sunscreen Recommendations (Melbourne)

• La Roche Posay invisible fluid sunscreen (119 upvotes)

Thread: Sunscreen Holy Grails (Asian Beauty)

• Skin Aqua UV moisture milk (64 upvotes)
• SKIN1004 Madagascar Centella sunscreen (36 upvotes)

Thread: If You Could Only Use One Sunscreen For the Rest... (Asian Beauty)

• skin1004 hyalu-cica water fit sun serum (242 upvotes)
• Round Lab birch juice moisturizing sunscreen. (108 upvotes)
• Biore UV Aqua Rich (167 upvotes)
• beauty of joseon relief sun aqua fresh or haruharu wonder black rice moisture airyfit (105 upvotes)

Thread: What Is Your Holy Grail Sunscreen? (SkincareAddiction)

• La Roche Posay Anthelios Fact Ultra Light Sunscreen (66 upvotes)

Thread: What's Your Go-To Sunscreen? (30PlusSkinCare)

• Skin1004 sunscreen. (88 upvotes)
• BoJ (75 upvotes)

Thread: What's Your Sunscreen Holy Grail? (30PlusSkinCare)

• La roche posay anthelios 50+ and round lab birch juice 50+ (178 upvotes)
• Biore UV Aqua rich (267 upvotes)
• Beauty of Joseon rice sunscreen. (216 upvotes)
• boj + round lab birch (51 upvotes)

Thread: What Are Your Holy Grail Sunblock Recommendations? (30PlusSkinCare)

• Biore Aqua watery essence (123 upvotes)
• boj (49 upvotes)