Scientific Sun Exposure Guide v2.1
⚡ Quick Read (5 Minutes) ✅ Core Conclusion: Sun exposure is a low-cost, evidence-based health behavior ✅ Key Practice: Year-round facial sun protection + 20-30 min daily limb exposure ✅ Upper Limit Principle: “Slightly pink skin” is the limit ✅ Winter is not “no sun” ✅ East Asian “parasol” = Middle Eastern “robe” ✅ Check…