How much vitamin b1 per day

2023-08-17 16:41:50


The Suggested Dietary Recompense vitamin b1 for men ages 19 and more seasoned is 1.2 mg everyday, and for ladies in a similar age range 1.1 mg day to day. For pregnancy and lactation, the sum increments to 1.4 mg everyday.


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The Recommended Daily Allowance for Vitamin B1


The recommended dietary allowance (RDA) for vitamin B1 is established by the Food and Nutrition Board of the Institute of Medicine based on the Estimated Average Requirement (EAR). The RDA meets the nutritional needs of 97-98% of healthy individuals in a specific age and gender demographic. For vitamin B1, the RDA is:


Adult men: 1.2 milligrams per day

Adult women: 1.1 mg per day

Pregnant women: 1.4 mg per day

Lactating women: 1.4 mg per day

The RDA for vitamin B1 is slightly higher for pregnant and breastfeeding women as the developing fetus and infant have increased thiamine needs. During pregnancy, adequate maternal vitamin B1 intake is crucial to prevent deficiency which can impact the baby's growth and brain development.


For children, the RDA for vitamin B1 is:


1-3 years: 0.5 mg per day

4-8 years: 0.6 mg per day

9-13 years: 0.9 mg per day

Once children reach their teen years around age 14, the RDA jumps up to approach adult levels - 1.2 mg for males and 1.0 mg for females daily.


Eating the suggested day to day measure of vitamin B1 from food sources and enhancements keeps up with ideal thiamine status in the body and forestall lack. Eating a decent eating regimen that gives the RDA of this fundamental supplement permits your body to effectively change over food into energy, keep up with nerve and muscle capability, support a solid heart mood and keep the mind working appropriately.

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Food Sources of Vitamin B1


Just a half cup of cooked brown rice provides about 15% of the daily value.

Pork chops, ham, lean beef, organ meats like liver - These animal proteins are high in absorbable thiamine. A 3-ounce serving of cooked pork chops offers around 27% DV.

Beans including navy, black, pinto, lentils, edamame, soybeans - All types of beans and legumes are great plant-based sources of vitamin B1. Half a cup of cooked lentils provides 19% DV.

Nuts like peanuts, pistachios, pine nuts, macadamia nuts - These make for vitamin B1 rich snack options. Just an ounce of pistachios offers 20% DV.

Seeds such as sunflower, pumpkin, flax, chia, sesame - Adding these to smoothies, oatmeal gives a good thiamine boost. 1 ounce of sunflower seeds has 14% DV.

Green leafy vegetables like spinach, kale, asparagus, broccoli - The darker green the leaves, the higher the B1 content. A cup of cooked spinach provides around 6% DV.

Potatoes and sweet potatoes - A medium baked potato with skin offers 17% DV. Sweet potato also provides some thiamine.

Milk, yogurt, cheese - Dairy products that are vitamin D fortified supply extra thiamine powder. One cup of milk has 10% DV.

Fortified cereals and bread - Check the label for added vitamins. A serving may provide up to 25% DV.

Fruits like cantaloupe, pineapple, oranges, strawberries, blueberries - These offer smaller amounts of vitamin B1. One orange has around 6% DV.

Try combining whole grains with nuts, seeds, organ meats or legumes at meals to maximize your dietary thiamine intake. Consuming raw thiamine-rich fruits and vegetables retains the most vitamins. The recommended daily amount of vitamin B1 can be easily obtained through a balanced diet consisting of the foods described above.


Signs of Vitamin B1 Deficiency


When vitamin B1 powder intake is inadequate over an extended period of time, it leads to depletion of thiamine reserves in the body. This progressively causes a vitamin B1 deficiency with the following symptoms:


Persistent fatigue, lethargy, weakness - Thiamine is needed to extract energy from carbohydrates, so a deficiency cuts down available energy.

Numbness, tingling, burning in hands, feet - A early symptom of B1 deficiency is damage to peripheral sensory nerves causing pain, prickling.

Muscle cramps, spasms, soreness, atrophy - Without enough pure b1, muscles rapidly tire and become weak.

Loss of appetite, nausea, constipation - Gastrointestinal effects occur as digestive enzymes require B1.

Rapid heart rate, irregular heartbeat, edema - Deficiency affects heart health due to role of B1 in cardiac muscle cell metabolism.

Irritability, memory loss, confusion, depression - Nerve damage causes cognitive deficits if left untreated.

Blurred vision, eye paralysis - Advanced vitamin B1 deficiency affects nerves controlling eye movement.

Impaired sense of touch, temperature, vibration - Due to worsening sensory neuropathy.

Since the human body cannot produce its own vitamin B1, regular adequate intake through diet and supplements is crucial to prevent deficiency.


Special Populations with Increased B1 Needs


There are certain groups of people and medical conditions that increase the daily requirement for vitamin B1. These individuals often need thiamine supplements in addition to food sources to optimize their intake:


Alcoholics - Chronic heavy alcohol consumption interferes with the absorption of thiamine from the digestive tract as well as its utilization in cells. Alcoholics require at least double the RDA.


Athletes and laborers - Intense physical activity and demanding manual work increases vitamin B1 powder demand and utilization. Supplements may be warranted in addition to dietary sources.


Diabetics - Insulin helps transport thiamine into cells so those with diabetes often have impaired thiamine utilization due to insulin dysregulation.


Bariatric surgery patients - Weight loss procedures like gastric bypass reduce absorption from the gut requiring higher thiamine intake.


Older adults - The capacity to absorb vitamin B1 along with other nutrients diminishes with advancing age due to reductions in stomach acid.


Autoimmune disorders - Conditions like celiac disease, Crohn's disease damage parts of the intestines and affect B1 absorption.


Dialysis - Patients who require regular dialysis treatments are at risk since thiamine is removed by the artificial kidney filtration.


Cancer patients - Those undergoing chemotherapy have trouble maintaining proper nutrition and absorbing nutrients.


HIV/AIDS - Increased risk of thiamine deficiency is seen in this population.


For all these high risk groups, a daily thiamine supplement providing 50-100 mg beyond the RDA is often recommended by healthcare providers along with a nutritious diet to prevent shortfalls.

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Can You Take Too Much Vitamin B1?

The tolerable upper intake level (UL) for pure vitamin B1 is not definitively established but it is believed that adverse effects from excessive doses are unlikely. Very high doses exceeding 300-500 mg per day may potentially cause:


  • Nausea, vomiting, rashes

  • Headaches, restlessness

  • Insomnia

  • Increased heart rate

  • Muscle weakness

So while toxicity from too much vitamin B1 is very rare if supplements are taken as directed, megadoses above 200-300 mg per day should be avoided as a safety precaution. Stick to the RDA unless medically advised to take more.



Vitamin B1 (Thiamine) Key Facts:


  • Water soluble B complex vitamin

  • Essential for converting food into energy

  • Supports nerve, heart, muscle, brain function

  • Found in whole grains, meat, fish, eggs, nuts, seeds

  • RDA is 1.1-1.4 mg per day for adults

  • Deficiency causes fatigue, neuropathy, beriberi

  • Supplements may be needed by those with increased requirements

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Potential Risks of Excessive Vitamin B1 Doses


While vitamin B1 is a water soluble vitamin and any excess is generally excreted in urine, very high doses exceeding the Tolerable Upper Intake Level (UL) may potentially have adverse effects in sensitive individuals. As per European Food Safety Authority, the UL is 100 mg per day for adults.


Possible side effects from taking too much vitamin B1 in the form of supplements above 300-500 mg per day include:


Nausea, vomiting, diarrhea

Abdominal bloating, cramps

Headaches, irritability

Insomnia, restlessness

Tachycardia, heart palpitations

Muscle weakness and pain

Rashes, itching, red skin

So while true toxicity from excessive vitamin B1 intake is quite rare, it is prudent to avoid megadoses over 200-300 mg per day in the absence of medical supervision. For the general population, staying within the RDA range through diet plus moderated supplementation as needed is recommended for optimal health.


In conclusion, the recommended dietary allowance for meeting daily vitamin B1 or thiamine needs is around 1.1 to 1.4 mg for most healthy adults. Eating a balanced diet comprised of whole grains, meat, fish, legumes, seeds, nuts and vegetables can help provide adequate thiamine to fulfill physiological requirements. Those with certain medical conditions may benefit from supplements of 50-100 mg per day in addition to dietary intake after consulting their doctor. 


Vitamin B1 plays a critical role in energy production, nerve and heart health. Consuming the right amount each day is vital for overall wellbeing. I hope this detailed overview offers a comprehensive understanding of how much vitamin B1 per day is ideal for maintaining good nutritional status.


To place an order for Vitamin B1 Powder, kindly reach out to Sciground at info@scigroundbio.com.


Vitamin B1: Fact Sheet for Health Professionals. National Institutes of Health.

Thiamin. Linus Pauling Institute at Oregon State University.

Vitamin B1 (Thiamine). Oregon State University.

Vitamin B1 (Thiamine). University of Michigan.

Vitamin B1. MedlinePlus, U.S. National Library of Medicine.


About Author

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Celine Xu is a botanist with over 15 years of experience researching and developing plant extracts for nutritional and pharmaceutical applications. She leads an R&D team focused on identification, cultivation and extraction of medicinal plants. Celine Xu earned a Ph.D. in Plant Biology has authored numerous articles in peer-reviewed journals about the health benefits of specific phytochemicals. She frequently speaks at industry conferences about new developments in plant extract research. Celine Xu is dedicated to advancing the scientific understanding of how targeted plant compounds can be used to improve human health.