Cognitive Impairment in Liver Disease
Introduction to Cognitive Impairment
- Cognitive impairment, including memory deficits and personality changes, is associated with liver disease, according to the European Association for the Study of the Liver and the Asian Pacific Association for the Study of the Liver 1, 2
- Memory retrieval deficits without storage impairment are associated with liver disease, according to the European Association for the Study of the Liver 1
- Other vitamin deficiencies, such as B12 and folate, can contribute to memory impairment in patients with liver disease, as noted by the American Association for the Study of Liver Diseases 1
Emotional and Psychological Impairment
- Anxiety and irritability are common symptoms in patients with liver disease, as reported by the American Association for the Study of Liver Diseases 2
Hepatic Encephalopathy
- Hepatic encephalopathy is a condition characterized by cognitive impairment, including memory deficits and personality changes, and is associated with liver disease, according to the European Association for the Study of the Liver and the Asian Pacific Association for the Study of the Liver 1, 2
Thiamine Deficiency
- Thiamine deficiency can manifest as Dry Beriberi, characterized by peripheral neuropathy with symptoms including numbness, tingling of limbs, disrupted coordination, and in severe cases, paralysis 3
- Thiamine deficiency can also present as Wet Beriberi, with cardiovascular manifestations including heart failure, tachycardia, and respiratory symptoms 3
- Certain populations are at high risk of thiamine deficiency, including those with prolonged vomiting, poor nutritional intake, inability to tolerate oral supplements, high alcohol intake, or rapid weight loss, and may require thiamine supplementation, as recommended by the Obesity Reviews guideline society 4
- Post-bariatric surgery patients should receive prophylactic thiamine, with a recommended dose of 15 mg oral thiamine daily, and increased dosage to 200-300 mg daily if symptomatic, as recommended by the Obesity Reviews guideline society 4
Nutritional Support and Supplementation
- Patients with malabsorptive conditions, such as short bowel syndrome, may require long-term thiamine supplementation and tailored nutritional support, including broad-spectrum antibiotics if necessary, as recommended by the European Society for Clinical Nutrition and Metabolism and the Obesity Reviews guideline society 5, 4
- Certain populations require multivitamin supplementation due to increased risk of nutrient deficiencies, including elderly individuals (≥65 years), institutionalized patients, dark-skinned or veiled individuals with limited sun exposure, pregnant or lactating women, strict vegetarians, individuals on calorie-restricted diets, and cancer patients with restricted dietary patterns, according to the American College of Obstetricians and Gynecologists, Academy of Nutrition and Dietetics, National Institutes of Health, and American Cancer Society 6, 7, 8
- Thiamine administration may be beneficial in patients with lactic acidosis based on the pathophysiologic hypothesis of mitochondrial respiratory chain dysfunction, with a strength of evidence rated as moderate by the American College of Physicians 9
- Thiamine dosing recommendations vary by clinical condition, with suggested doses including:
- Thiamine status should be determined by measuring RBC or whole blood thiamine diphosphate (ThDP) 10
- Monitor blood levels of vitamin D in high-risk individuals, according to the Obesity Reviews society 4
- Monitor calcium and vitamin D levels in post-bariatric surgery patients and those on high-dose supplementation, as recommended by the Obesity Reviews society 4
Education and Prevention
- Patients should be educated about the potential risks of thiamine deficiency and the importance of seeking early medical advice, as recommended by the Obesity Reviews guideline society 4
- Clinicians in both primary and secondary care need education on predisposing factors and the importance of immediate treatment, according to the Obesity Reviews guideline society 4
- Routine supplementation with micronutrients and minerals is not recommended for the general population unless there are specific deficiencies, as there is no clear evidence of benefit from vitamin or mineral supplementation in people without underlying deficiencies, according to the American Diabetes Association 12, 13, 14
- Avoid high-dose antioxidant supplements during chemotherapy or radiation therapy, as recommended by the Ca-A Cancer Journal for Clinicians society 15
- Counsel against β-carotene supplementation as there is evidence of harm, according to the American Diabetes Association 14
Deficiency Prevalence
Deficiency prevalence for certain vitamins:
Vitamin Deficiency Prevalence Vitamin A 3-14.5% Vitamin D 58-77.9% Vitamin K 13-63%