Used in a hair mask, egg yolk's biotin boosts growth and strengthens strands to thwart shedding. Mix 1 yolk with 1 tablespoon of olive oil (its amino acids plump strands and reduce breakage), then apply from scalp to ends of damp hair. Rinse after 15 minutes.
Three Egg-cellent Beauty Tricks for Hair and Skin

If the only thing you're doing with eggs is making omelets, you're missing out. Eggs contain several vitamins and minerals essential to a healthful diet, including vitamin A, vitamin B-12, and selenium for a healthy immune system — but eggs can also contribute to your outer health, strengthening hair and improving skin. Here's how.
Yolks Thicken Hair
Whites De-Puff Eyes
Thanks to their high protein content, egg whites tighten skin as they dry, reducing undereye swelling for up to 4 hours. Beat the white of 1 egg until foamy, then dab onto undereye bags with a cotton ball. Let sit 15 minutes, then rinse.
Shells Soften Rough Skin
The grittiness of a ground eggshell scrub sloughs off dead, dry skin cells while its minerals repair any damage. Grind 2 or 3 eggshells in a blender until pulverized, then mix with 2 tablespoons of coconut oil. Rub onto damp skin while showering, then rinse.
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