
Description
"Vitamin B1" (thiamine) is a water-soluble vitamin that must be obtained daily since the body does not store it. This essential nutrient plays a role in carbohydrate metabolism, converting food into energy. Nerve and heart function rely on adequate thiamine intake to support communication between cells. It also assists digestion by promoting hydrochloric acid production, which enhances nutrient absorption. A steady dietary supply of vitamin B1 is necessary to maintain metabolic balance and neurological stability.
Functions in the Body
Category
Deficiency Symptoms
Deficiency in vitamin B1 can result in fatigue, reduced appetite, weight loss, muscle cramps, irritability, constipation, tongue/mouth inflammation, and severe cases may lead to beriberi disease, which can affect both the cardiovascular and nervous systems.
Synergists & Antagonists
Vitamin B1 works synergistically with vitamins A, B2, B3, B5, B6, B12, C, and E, as well as cobalt, copper, iron, potassium, magnesium, and zinc, to support energy production and cellular function. However, excessive intake of vitamin B6, B12, copper, potassium, and zinc may create antagonistic interactions, disrupting its function.

Vitamin B1
Warnings
Vitamin B1 interacts with digoxin (used for heart failure), dilantin (an anticonvulsant), and diuretics, which can increase its excretion. While generally well-tolerated, individuals on long-term medication should consult their healthcare provider.
Food Sources
Rich food sources of vitamin B1 include nutritional yeast, beef, liver, nuts, oats, oranges, pork, eggs, seeds, legumes, and peas.
Time Frame
Vitamin B1 can be consumed anytime, though it is best taken in the morning for optimal energy support as it aids in metabolism.
Depleted By
Factors that can deplete vitamin B1 include alcohol, antacids, anti-convulsants, sedatives, nicotine, hormone replacements, diuretics, antidiabetics, statins, anti-cancer medications, caffeine, bronchodilators, blood pressure medications, cardiac regulators, antibiotics, antifungals, antidepressants, analgesics, anti-inflammatory medications, NSAIDs, and opioids.