Table 7.
SPF determination for the anti-ageing cream.
| Subject’s Characteristics * | MEDu (mJ/cm2) | MEDs (mJ/cm2) | SPFs (MEDs/MEDu) | MEDp (mJ/cm2) | SPFi p (MEDp/MEDu) |
|---|---|---|---|---|---|
| S1 (38, M, I) | 21 | 380 | 18.1 | 336 | 16.0 |
| S2 (47, M, III) | 25 | 425 | 17.0 | 375 | 15.0 |
| S3 (64, W, III) | 26 | 468 | 18.0 | 436.8 | 16.8 |
| S4 (30, W, II) | 19 | 342 | 18.0 | 340.5 | 17.9 |
| S5 (54, W, II) | 18 | 306 | 17.0 | 302.4 | 16.8 |
| S6 (58, W, I) | 16 | 288 | 18.0 | 256 | 16.0 |
| S7 (48, W, I) | 15 | 270 | 18.0 | 225 | 15.0 |
| S8 (51, W, I) | 16 | 288 | 18.0 | 268.8 | 16.8 |
| S9 (42, W, II) | 20 | 360 | 18.0 | 300 | 15.0 |
| S10 (56, W, III) | 27 | 432 | 16.0 | 405 | 15.0 |
| Average value ± standard deviation | 17.6 ± 0.7 | 16.0 ± 1.0 | |||
* Age, sex and phototype of the subject’s; I—Fitzpatrick skin phototype I (white skin, always burns, never tans); II—Fitzpatrick skin phototype II (white skin, always burns, minimal tan) and III—Fitzpatrick skin phototype III (white skin, burns minimally, tans moderately and gradually); M—men; W—woman. MED—minimal erythema dose; MEDu—MED for unprotected skin; MEDs—MED for standard product-protected skin; MEDp—MED for product-protected skin; SPFs—individual SPF for standard product-protected skin; SPFi—individual SPF for product-protected.