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This 10-Second Test Will Tell You How Healthy Your Hair Is Subscribe Do you actually know how healthy your hair is? Well, the answer is closer than you'd think. Try this to find out if your locks are in tip-top shape or if they need a little extra loving: Pluck a clean strand and drop it in an eight-ounce glass of water. If it floats, your hair is in good condition. If it sinks, you've got "high porosity" issues. The reason it plunges is because water is able to push through the cuticle, leading to frizz and quickly fading color (color molecules escape more quickly from porous strands). To combat this, use a weekly hydrating mask with amino and fatty lipids, which will bolster your hair's outer layers, keeping your strands smooth and your shade on lockdown.