"Mental sluggishness" refers to a state where a person's brain feels slow and they have difficulty thinking, processing information, or concentrating. It can make someone feel mentally tired or mentally foggy. Full definition
A fascinating cure for «mental sluggishness» comes from the American Amish community, who eat bell pepper seeds for nine days, starting with one and doubling the dosage each day until 256 are consumed. (fieryfoodscentral.com)
Get to bed earlier if you have the symptoms of sleep deprivation, which include a lack of daytime energy, mental sluggishness, attention problems, or weight gain, Dr. Casciari says. (health.com)
Vitamin B9 deficiency and can result in inflammation of the tongue, gingivitis, poor growth, loss of appetite, forgetfulness, mental sluggishness, diarrhea, shortness of breath and irritability. (ahealthblog.com)