From age 34-44 I had to give up training due to an injury, but I still maintained the 5 small meals a day, never felt hungry. I resumed training 8yrs ago, everything still good.
It’s good that such an eating pattern works for you - others can eat only once per day and be equally fine. But the discussion was not n=1, but rather what fits best for the population overall, and health overall. For certain our ancestors didn’t carry several small meals per day, they ate when they hunted or gathered food, and then went long periods until the next meal was available. Even when I was younger we ate three times a day, never more. It’s a relatively modern thing to eat more frequently, and especially to NEED to eat more frequently.
There are some issues with such an eating frequency. first is that insulin secretion has two phases. The first lasts for 10 minutes or less. Our pancreas stores insulin ready for an upcoming meal, and during this first phase that stored insulin is released. Then in phase 2 the pancreas produces more insulin - insulin is then present in the bloodstream for 2-3 hours after the meal is consumed.
Eating several small meals a day puts a strain on the pancreas because it is only able to produce the stored insulin for phase 1 at the first meal of the day. For subsequent meals it is still secreting phase 2. The pancreatic beta cells are therefore working nonstop, which is not an ideal situation (a stressor toward diabetes)
Second is that leptin and insulin together manage our energy (consumption and storage), and we have leptin receptors on the pancreatic beta cells. When we eat leptin levels should rise, and that in turn increases our satiety plus signalling pancreas to stop producing insulin. However an increase in insulin also increases leptin. If we are continually secreting insulin, and therefore increasing leptin, we can risk leptin resistance and from there metabolic syndrome.
So it’s a strategy that can work for some, but on a wide scale may cause far more harm than good. Indeed we already see a rise in both metabolic syndrome and diabetes, as we see people “grazing” throughout the day, with many small meals. So need to be very careful how we interpret widespread results based upon individual experience.