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Clinical Studies: Cosmetics, Personal and Baby Care Products

Cosmetics and personal care products often require both safety and efficacy testing before introduction into the marketplace. Our highly trained staff is dedicated to running exceptional studies to help you answer the following critical questions:

Is my product safe?
Safety testing of ingredients and finished products for sensitization or irritation can prevent adverse reactions in the market.

How does my product compare to a competitor’s?
North Cliff Consultants helps companies benchmark their product versus a competitive product. We can also provide reliable data to support claim substantiation studies.

Does my product perform as expected?

Does my moisturizer moisturize?

How long do the effects last?
North Cliff Consultants places a priority on the ongoing training of our staff. Staff members receive one-on-one training, as well as group instruction, for specific study tasks, visual grading, instrumental operation, skin science, Good Clinical Practice and safety training. Clients are welcome to train our personnel for specialized study tasks.

The following areas represent study types that we have been helping our clients with for almost 30 years:

Washing StudiesSafety Studies

  • Sensitization (RIPT)
  • Cumulative Irritation

Washing Studies

  • Exaggerated Leg Wash (LCAT)
  • Exaggerated Arm Wash (FCAT)
  • Exaggerated Hand Washing

Over-the-Counter Drugs and Medical Devices

  • Antiperspirant Testing
  • Anti-Dandruff Shampoo Testing
  • Hair Removal Products and Devices

Efficacy Studies

  • Clinical Mildness Tests
  • Moisturization Studies
  • Shampoo and Hair Care Studies
  • Baby and Adult Diaper Testing
  • Shaving and Shaving Preparation Product Testing
  • Acne Product Studies
  • Cleansing Studies
  • Fine Lines and Wrinkles Product Testing
  • Age Spots and Uneven Skin Tone Product Testing

Safety-in-Use TestsSafety-in-Use Tests

  • Facial Cosmetics
  • Eye-area Cosmetics
  • Lip-area Cosmetics
  • Nail Care Products
  • Soaps & Lotions
  • Personal Hygiene Products
  • Bath Products
  • Acne Products

Expert Graders and Bio-Instrumentation

Expert visual grading and complementary instrumental measurements provide important information about your product’s performance and effect on the skin.

Expert Visual Skin Graders

  • Dryness and redness
  • Contact sensitization (RIPT)
  • Irritation grading
  • Fine lines and wrinkles
  • Age spots (face and arm)
  • Skin texture
  • Acne
  • Diaper rash


  • Trans-epidermal water loss (TEWL)
    • DermaLab and Vapometer
  • Skin Hydration – Corneometer 825
    • SNOVA DPM 9003, Skicon-200
  • Skin erythema – ChromaMeter CR 300

North Cliff Consultants also has working relationships with providers of skin imaging and analysis equipment.

Physicians and statisticians work with us as Medical Investigators and/or Consultants.