I had the flu this past February and my sense of smell almost completely disappeared during the sinus phase of it. After I fully recovered from all the other symptoms – which took about a month - my sense of smell remained greatly diminished. I can smell some things but not others and the sensitivity is way down. Google informs me this can happen after a viral infection, and that it may improve over time.
Now I’m wondering if this is actually helping me with a reduction in appetite. Food smells always used to trigger my urge to eat even when I wasn’t really hungry.
Since our results indicated that reducing olfactory sensitivity is associated with improved metabolic fitness, we investigated whether the converse manipulation of olfactory acuity would worsen metabolic health.
…As the olfactory bulb contains a high density of insulin receptors, leptin receptors and other endocrine hormone receptors, we considered that hormonal inputs might be able to adjust olfactory perception.
…increased body weight was accompanied by excessive adipose tissue mass in the gonadal and inguinal fat depots. Particularly, the gonadal fat pad had enlarged adipocytes compared to control animals, accompanied by non-significant reduction in energy expenditure, oxygen consumption, and respiratory quotient. Importantly, adipose expansion was independent of food intake, which remained unchanged compared to controls. https://www.cell.com/cell-metabolism/fulltext/S1550-4131(17)30357-1?fbclid=IwAR1gbff9tZGyYEFnW2VdXz_DAtbjHPB9j-ZKGtl1UeI-8B4aZPe0HiPv5f8