Study of lip hydration with application of photoprotective lipstick: influence of skin phototype, size of lips, age, sex and smoking habits

Med Oral Patol Oral Cir Bucal. 2010 May 1;15(3):e445-50. doi: 10.4317/medoral.15.e445.


Objectives: To study lip hydration levels when applying a lipstick sunscreen for 3 months and to evaluate the influence of size of lips, age, sex, smoking and skin phototype.

Study design: The study group was formed by 140 volunteer subjects, one group consisting of 70 patients applying a commercial lipstick sunscreen three times a day and the other group of 70 controls in which no product was applied. The age range was 20-86 years. The influence in lip hydration levels of age, sex, phototype, size of the lips and smoking habits was studied using a Corneometer 825 (Courage & Khazaka Electronic GmbH, Cologne, Germany).

Results: An increase in lip hydration was found between the basal (53.49 +/- 15.259) and final (59.34 +/- 14.51) Corneometer 825 (Courage & Khazaka Electronic GmbH, Cologne, Germany) measurements over the three months of treatment, with statistically significant differences with respect to the control (p=0.002). However, no statistically significant differences in lip hydration were observed with regard to age, (p=0.48), gender (p=0.876), skin phototype (p=0.653), lip area (p=0.291) and smoking (p=0.178).

Conclusions: Application of a lipstick sunscreen 3 times a day for 3 months increases lip hydration.

MeSH terms

  • Adult
  • Age Factors
  • Aged
  • Aged, 80 and over
  • Body Water / drug effects
  • Cosmetics / administration & dosage*
  • Female
  • Humans
  • Lip / anatomy & histology
  • Lip / drug effects*
  • Lip / physiology*
  • Male
  • Middle Aged
  • Organ Size
  • Sex Factors
  • Skin Pigmentation
  • Smoking
  • Sunscreening Agents / administration & dosage*
  • Young Adult


  • Cosmetics
  • Sunscreening Agents