TRICHOLOGIST · HAIR LOSS SPECIALIST · @drshab

Dr. Shab Reslan is a certified trichologist and one of the most recognized hair and scalp health educators on social media, with over 500,000 followers across TikTok and Instagram. She specializes in diagnosing and treating hair loss, scalp conditions, and follicle health — with a strong focus on evidence-based, non-invasive scalp care.

Dr. Shab is known for her clear, myth-busting approach to scalp science: explaining why the scalp is the foundation of all hair health, and why most people treat their hair without ever addressing the root cause.

“Your scalp is skin. It has follicles, a microbiome, and it responds to care exactly the way your face does. The tools and rituals you use matter enormously.”

Her philosophy aligns directly with Rootli’s core belief: that scalp health is the first and most important step in any hair care routine. The Root Tech System™ — with its combination of gua sha, red light, and serum delivery — reflects exactly the kind of multi-modal scalp approach she advocates.

BOARD-CERTIFIED DERMATOLOGIST · CLINICAL INSTRUCTOR, WEILL CORNELL MEDICINE

Dr. Michelle Henry is a Harvard-trained, board-certified dermatologist based in New York City. She is a Clinical Instructor of Dermatology at Weill Cornell Medicine and a nationally recognized expert in skincare, cosmetic dermatology, and skin health.

Dr. Henry has been a leading voice in the “skin-first” approach to beauty — advocating that true skin health (and scalp health) requires understanding what’s happening at the cellular level, not just treating surface symptoms.

She has spoken extensively on the science of scalp care, noting that the scalp shares the same skin biology as the face — including follicles, sebaceous glands, and a microbiome — yet receives a fraction of the care.

“We invest so much in facial skincare and almost nothing in scalp care. The scalp is where every strand of hair begins. It deserves the same attention.”

This perspective is the foundation of Rootli’s Root Tech System™ — a complete scalp ritual designed with the same rigor as a skincare routine.

CERTIFIED HAIR LOSS PRACTITIONER · CHIEF TRICHOLOGIST, BOSLEYMD

Gretchen Friese is a board-certified trichologist and the Chief Trichologist at BosleyMD, one of the most recognized hair restoration brands in the United States. With over a decade of clinical experience in hair and scalp health, she is a trusted voice in both professional and consumer hair care.

Gretchen regularly contributes to major media outlets including Byrdie, Real Simple, and Healthline, explaining the science of hair loss, scalp health, and follicle care in accessible, practical terms.

Her clinical focus on scalp circulation, follicle activation, and evidence-based topical treatments maps directly onto what Rootli’s Root Complex™ was designed to do — supporting follicle vitality through three globally-patented actives: Redensyl™, Procapil®, and Caffeine.

“Scalp health is the conversation the beauty industry is finally starting to have. Follicle health, circulation, barrier function — these are the real foundations of beautiful hair.”

BOARD-CERTIFIED DERMATOLOGIST · FOUNDER, AMBEROON INC. · @hairscientist

Dr. Erum Ilyas is a board-certified dermatologist and one of the most followed hair and scalp science educators on social media. Known online as @hairscientist, she has built a community of over 300,000 followers by breaking down complex dermatology into genuinely useful, evidence-based content.

Dr. Ilyas specializes in hair loss, scalp conditions, and the intersection of hormonal health and hair biology. She is particularly vocal about the importance of scalp-first thinking in hair care — challenging the common practice of focusing only on the hair strand while ignoring the follicle environment beneath it.

Her content on scalp microbiome health, follicle stimulation, and the role of circulation in hair density directly reflects the science behind Rootli’s Root Tech System™.

“The follicle is where everything happens. Products that only sit on the hair shaft are missing the point entirely. You need to get actives to the scalp — and that requires the right delivery system.”

WORLD TRICHOLOGY SOCIETY CERTIFIED · FOUNDER, ADVANCED TRICHOLOGY

William Gaunitz is a World Trichology Society-certified trichologist and the founder of Advanced Trichology, one of the United States’ leading hair loss treatment practices. He has treated thousands of patients with hair thinning, follicle miniaturization, and scalp dysfunction — and is one of the most cited trichology voices in American media.

William has been featured in Forbes, Men’s Health, Healthline, and numerous industry publications for his work in non-invasive hair restoration. He is a strong proponent of multi-modal scalp treatment — combining mechanical stimulation, light therapy, and evidence-based topical actives for follicle support.

This is precisely the approach embedded in the Rootli Root Tech System™: Sculpt (gua sha for circulation) → Treat (red light + EMS for follicle activation) → Infuse (nano mist for serum delivery) → Protect (Root Complex™ actives).

“Hair restoration isn’t one thing. It’s circulation, nutrition, stimulation, and the right actives delivered at the right depth. That combination is what actually moves the needle.”