Avalon Organics
Biotin B-Complex Thickening Shampoo, $6.41 at Amazon
This organic, plant-based shampoo is designed to give density to fine hair. It has a blend of biotin, saw palmetto, quinoa protein and vitamin E to strengthen hair. It's also great if you suffer from hair fallout.

TRESemmé
Pro Collection Shampoo Thick & Full, $5.98 at Walmart This micellar shampoo has a pH-balanced formula that's ideal for delicate hair. It also has glycerol to bind water to your hair and proteins to plump your strands.

Kérastase
Densifique Bain Densité Shampoo, $33 at Kérastase
This shampoo has hyaluronic acid to mois...