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Carol Buck Founder & CEO of NONYX Fungal Nail Clarifying Gel

Our Story

Innovation in Personal Care

In 1996, Xenna Founder, Carol J. Buck began developing personal care products that today are sold across the country to millions. With business experience in advertising, consumer product marketing and pharmaceutical consulting, she had the knowledge base to launch her own personal care products company.

Her first product was a natural curl relaxer which successfully sold in Walgreens for several years. Her hair relaxer research led to an in-depth understanding of the protein keratin and opened the door to other applications. Because toenails and fingernails are comprised of keratin Carol realized, and later clinically proved, that another formulation would clear nails of keratin debris, the unsightly, discoloring build-up under nails where nail fungus thrives. Branded NONYX® Fungal Nail Clarifying Gel, this discovery put Xenna on the retail map. Today, Xenna continues to develop new products for skin, feet and nails. Ms. Buck is an active member of the Women Presidents' Organization, the Society of Cosmetic Chemists and the Diversity Alliance for Science. She lives in Princeton, NJ with her husband, a retired entrepreneur and novelist, and enjoys tennis and gardening in her spare time.


M.I.A. Columbia University; BA, Stanford University

Prior to founding Xenna, Ms. Buck was the Vice President of Princeton Group International, Inc., a healthcare industry consulting firm. Among her clients were Beth Israel Hospital, Ethicon (J&J), David Sarnoff Research Center, Cyanotech Corporation, Biofem, Inc., Ixion Biotechnology, North Shore University Health System (now Northwell Health) and Universal Health Communications. She was also Treasurer and a Board member of Atlantic Health, Inc., a firm established to build and operate outpatient cancer clinics worldwide. Earlier in her career, Ms. Buck was a Senior Product Manager at General Foods Corporation and an Account Supervisor within the advertising industry. In the early '90s Ms. Buck turned her focus to biochemistry and initiated the research and patents that form the framework for Xenna's personal care product lines and basic research.

NONYX Fungal Nail Clarifying Gel is a Women Owned Company

Our Mission

To provide consumers with unique, clinically proven, effective personal care products that fill unmet needs.
Founded in 1996 and based in Princeton, NJ, Xenna Corporation is focused on developing and distributing products for hair, skin and nails that solve unmet consumer needs with ease and minimal chemical ingredients. Those created have no parabens or preservatives and are clinically proven effective. The largest brand is NONYX® Fungal Nail Clarifying Gel, an exfoliant of keratin debris where nail fungus thrives. It has been sold in national retail chains since 2004.
Xenna Corporation is a member of ICMAD, the national association of Independent Cosmetic Manufactures and Distributors and the Society of Cosmetics Chemists. The company was ranked as one of New Jersey's Top Research Facilities in 2006 by NJ Biz. Additional information is available through Dunn & Bradstreet.

Giving & Community Support

Xenna Corporation has supported many charities and local community programs, including:

  • Diabetic education programs nationwide

  • The Breast Cancer Research Foundation

  • Anchor House Foundation (for runaways)

  • American Red Cross

  • Easter Seals Inc.

  • The HotSun Foundation in Nairobi, Kenya through Global Giving

  • Hands Together in Haiti

  • The Kinney Drugs Foundation

  • Medical Missionaries of Mary in Africa and worldwide

  • Mothers Against Drunk Driving

  • Special Olympics of New Jersey

  • Princeton NJ First Aid & Rescue

  • Breast Cancer Solutions – Providing financial aid to breast cancer patients

  • Mercer Street FRIENDS – Improving the lives of children and families in Trenton, NJ

  • Senior Care Services NJ

  • The Yale Child Study Center in support of research to treat Childhood Disintegrative Disorder 


CalmSkin Compelte, Soothing Skin Gel

Calms & Soothes
Irritated Skin

Reduces the appearance of
associated with mild to moderate

*As proven in a 6 week clinical study

CalmScalp, for Symptoms of Mild to Moderate Psoriasis

Soothes Scalp 
with mild to moderate

Scales, Redness, Cracking, Flaking & Dryness

*As proven in a 6 week clinical study

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