What are some common but often overlooked nutrient deficiencies, and what steps can be taken to address and correct them effectively?

Subclinical nutrient deficiencies, though asymptomatic in the short term, can lead to significant long-term health issues. Ensuring a diverse, nutrient-rich diet is crucial for overall health.

- Vitamin B1 Deficiency: Essential for brain function, a lack of vitamin B1 (thiamine) can result in cognitive decline and conditions like Wernicke-Korsakoff syndrome. Sources include legumes and pork.

- Niacin Deficiency: Severe deficiency in niacin (vitamin B3) causes pellagra, marked by diarrhea, dermatitis, dementia, and death. Niacin is found in poultry, fish, and nuts.

- Vitamin A Deficiency: Critical for vision, especially night vision, vitamin A deficiency can lead to night blindness and severe cases of blindness. Key sources include liver and leafy greens.

- Vitamin E Deficiency: As an antioxidant, vitamin E protects cells and supports immune function. Severe deficiency can cause muscle weakness, vision problems, and heart arrhythmias. Sources include nuts, seeds, and vegetable oils.