Investigation on the effect of food crop derived food supplements on Acute Respiratory Tract Infections in community dwelling seniors during the winter season

INTERVENTION: NL‐01 low dose, NL‐01 high dose vs placebo CONDITION: Acute Respiratory Tract Infections, Flu, Healthy elderly , Immune function ; ; PRIMARY OUTCOME: ‐Number of Acute Respiratory Tract Infections (ARTI) episodes; ; ‐Average duration of ARTI episodes in days; ; ‐Average severity of ARTI episodes ; SECONDARY OUTCOME: ‐Doctor / hospital visits, ; ; ; ; ‐Any infection occurring in the treatment period, ; ; ; ; ‐Any medication use related to infections, ; ; ; ; ‐Calculated disease load of ARTI per study arm (#episodes x duration of episodes), ; ; ; ; ‐Incidence and disease load (episodes x duration) of any kind of infection, ; ; ; ; ‐Indication of efficacy per defined sub‐population (e.g. malnourished, on medical foods, COPD etc), ; ; ; ; ‐Quality of Life questionnaire (5Q‐5D‐5L questionnaire). ; INCLUSION CRITERIA: 1. Be able to give written informed consent; 2. Be aged =65 years; 3. Have a General Practitioner; 4. Be in good physical and mental condition;