Most Helpful Guy
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Most Helpful Girl
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there are a lot of hair products that can help. I use "half baked" by bedhead and it smells amazing and definitely adds volume. my hair dresser showed it to me.
Maybe try an abaca do and olive oil treatment? Worked for me! Although I'm not sure it's meant for thickness and volume.. But, you could buy some hair products at a drugstore, such as mousse etc.
Momouse in hair after shower and twirl it with fingers