The secondary objectives of this study is to compare the two groups in order to:
A- correlate the impact of the recommendations by sheet or consult with disability, cognitive status, fatigue, depression, quality of life of patients with MS.
B- assess the prevalence of diet changes as an alternative therapy for lactose intolerance in the population and to correlate these changes with dietary calcium intake at baseline (assessed by a food survey based on CIQUAL\* data).
C- assess calcium intake of the patients included via the self-administered frequency questionnaire QALCIMUM® on day 0 and 6 months and to compare them with data obtained by the food survey based on data from CIQUAL.
D- correlate calcium intake of the patients with vitamin D levels at inclusion and establish a biological collection of blood samples from the population.
