The 4-2-1 rule is a tool that doctors use to diagnose severe cases of diabetic retinopathy, an eye condition affecting people with diabetes that can progress to vision loss. If high blood sugar levels ...
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What is the 4-2-4 rule in skincare, expert shares the benefits
Some skincare trends ask you to buy more products. Others ask you to slow down. One such current trend the 4-2-4 rule. Rather than focusing on what you use, this Korean skincare method concerns how ...
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