The term covers the cumulative effect of climatic exposure, namely sunlight, air pullutants, wind, seawater and spindrift, or chlorinated water of swimming pools.
The prevailing inducer of damage is sunlight which, apart from bleaching brown hair and yellowing blond hair, causes photooxidative splitting of cystine linkages, initiates free radicals detrimental to the protein matrix, and increases porosity of the cuticle. Degradation processes are enhanced by ambient humidity. The physico-
The alterations are not restricted to surface properties -
It is not a matter of inadeguate sebum level, but of an alteration in fiber texture.
Whether it originates a physiological lack of sebum, a mechanical or chemical over processing, or environmental factors, the result is the same: what is generally, and rather vaguely, known as "dry hair", "weakened hair", or "damaged hair".
Also for these problems the MAVI research team has organized specific treatments by the use of a new shampoo "BIOESSE" and a special Bio HAIR MUD