A web site Deep Roots At Home in a post titled 'Why Sugar Ages & Weakens You: What Happens When Throttled Back?' states that:
'EATING SUGARS OF ANY KIND HAS THE POTENTIAL TO REDUCE YOUR BODY’S DEFENSES BY 75% OR MORE FOR FOUR TO SIX HOURS.'
which can be found with a search for 'deeprootsathome reasons-cut-sugar'
My first observation is that there is not quantitative values in the action side of the statement just on the results side. Ignoring that aspect of the assertion, what is the reality of the statement?