11 Hidden Clues You are Running Dangerously Low on Thiamine
2. Early Warning Signs: Fatigue and Irritability

One of the earliest signs of thiamine deficiency is a persistent feeling of fatigue. This occurs because thiamine is essential for energy production, and without it, the body's ability to generate energy from food is compromised. Alongside fatigue, individuals may experience irritability and mood changes. This is because thiamine is also involved in synthesizing neurotransmitters that regulate mood. When the brain lacks sufficient energy, it can affect emotional regulation, leading to increased irritability. These symptoms can often be mistaken for stress or overwork, which is why they are considered surprising indicators of a deeper nutritional issue. Recognizing these early signs is crucial for preventing more severe complications associated with thiamine deficiency.