3. You Feel Bloated, Heavy, or Uncomfortably Full
A low-fiber diet often pairs with constipation, which in turn brings bloating, abdominal discomfort, and a sense of fullness. If your stomach feels tight or swollen by day's end, fiber could be a factor. Bloating has many causes, but when it coexists with sluggish bowel habits or hard stools, a fiber deficiency becomes more plausible.