Absorption study, 2011

Trial centre

proDERM Institute for Applied Dermatological Research, Hamburg, Germany.

Study 1

Objective

To assess the rate of absorption of Bi-Oil after standardised application and rubbing in.

Sample

Subjects: 22 trained raters (21 female and 1 male). Test site: test products applied to the volar forearm of all raters.

Methodology

Double-blind, randomised and controlled. Bi-Oil and a reference oil were applied to assigned test areas on the volar forearms of raters. Raters performed 100 cyclic movements at a defined speed. Raters then rated the absorption of the products on a 5-point scale from ‘very slow absorbing’ to ‘very fast absorbing’. Sebumeter measurements, to assess the amount of oil on the skin, were taken at two time points - before application and two minutes after product application.

Result

The absorbency of Bi-Oil into the skin was assessed as ‘very fast’ or ‘fast’ by the majority (77.3%) of trained raters. This was verified through instrumental measurement with sebumeter readings at the second time point showing that the amount of Bi-Oil left on the skin was significantly lower than compared with the reference oil.

Study 2

Objective

To assess the rate of absorption of Bi-Oil after standardised application and rubbing in.

Sample

Subjects: 100 participants (97 female and 3 male). Test site: test products applied to the volar forearm of all participants.

Methodology

Double-blind, randomised and controlled. Bi-Oil and a reference oil were applied to assigned test areas on the volar forearms of participants. Participants rubbed in the test product for 1 minute each. Participants then rated the absorption of the products on a 5-point scale from ‘very slow absorbing’ to ‘very fast absorbing’.

Result

The absorbency of Bi-Oil into the skin was assessed as ‘very fast’ or ‘fast’ by the majority (72%) of participants.