Positives

• One person experiencing fatigue from Long COVID noted that each dose of MCT oil provided a “subtle but noticeable boost” in energy, which accumulated over time, leading to progressively more energetic days Reddit.
  
  
• A patient attributed their recovery from Long COVID to the use of MCT oil combined with over-the-counter antihistamines, highlighting the oil's role in their improvement Reddit.
  
  

Negatives

• More than 60% of patients starting MCT oil report GI side effects including diarrhea, nausea, and bloating because rapid absorption combined with glycerol's osmotic effect irritates the gut; symptoms typically appear within 1-2 hours of dosing. Healthline.
• Patients on a ketogenic protocol who add MCT oil often see compounded GI distress because the high-fat baseline already stresses the digestive tract; published guidance recommends starting at 5 g and gradually titrating up over weeks. PMC.
• There is no published evidence that MCT oil meaningfully improves Long COVID fatigue or cognitive symptoms; benefits in epilepsy and certain metabolic conditions don't generalize to post-viral illness. Healthline.

Hurdles & Side Effects

• One patient advised that MCT powder may be preferable to oil, as high doses of MCT oil can cause “a bad case of disaster pants,” indicating potential digestive issues Reddit.