• Thin (or thinning) hair? Ask your barber or stylist for a "choppy" cut. The hair will be cut in all different lengths, giving it depth, more volume and a thicker appearance.

FYI: Aaron Morse, one of Kiehl's founders, had a major passion for motorcycles. His collection at the NY flagship store includes Steve McQueen's '34 Indian Suicide Shift and Clark Gable's Harley-Davidson RL.

{07.25.08} Test Lab

Thick Headed

Kiehl's new Ultimate Thickening Shampoo promises to "reinforce hair strands for a noticeably thicker appearance and improved scalp coverage," thanks to an ingredient list that reads like a multivitamin. Antioxidants, Omega-6 fatty acids and Vitamin E? All there. Throw in some peppermint oil and a few more herbs and you practically have a protein shake. But after a two-week trial, we're believers. While we're not exactly losing hair, we've had extremely fine hair all our lives. And we definitely see an improvement in thickness. Plus, the minty lather not only offers a refreshing wake-up in the morning, it adds a cooling sensation to your scalp, making it great for sunburned ears. $18, at Kiehl's.