The biomechanical behaviour of human skin has been studied in order to better understand this complex behaviour allowing all types of movements, within the physiological limits, without cracking. Water from diet allegedly affect skin hydration and both seems to play a role in this context. So, the aim of this study is to identify the relationship between ingested water, skin hydration and skin biomechanical properties. Forty healthy volunteers, female, mean age 24,30±5,53 y.o. participated in the study, after informed written consent. All procedures respected Helsinki principles and respective amendments. Volunteers with different dietary water intakes were asked to drink 2L water/dayly during 1 month. Measurements of skin physiological variables were taken in day 0 (t0) and day 30 (t30) and focused several anatomical regions (zygomatic, forehead, ventral forearm, hand and, external leg). Representative variables were transepidermal water loss (TEWL, measured by Tewameter TM300, CK electronics), epidermal hydration (measured by MoistureMeter SC and MoistureMeter D, Delphin) and biomechanical descriptors (Cutometer CM575, CK electronics).. Statistics included a t-student paired sample, hypothesis testing Shapiro – Wilk, Spearman, and a Pearson and Spearman correlation with a confidence level of 95% A significant positive correlation between hydration and total extensibility (Uf) and a negative correlation (p<0,05) with total elasticity (Ua/Uf) elasticity (Ur/Ue), visco-elastic index (Ue/Uv) and total deformation recovery at the end of stress-off period (Ua) was noted. Thus, a positive impact on skin physiology seems to result from higher water intakes, in particular in those individuals that regularly consume less water