Source Naturals B-1 High Potency 500 MG 100 Tablets
B-1 is intimately involved in many aspects of nerve health and function. The active co-enzyme form of B-1, thiamin pyrophosphate (TPP), is necessary for energy production and is essential for the formation of acetylcholine, a major neurotransmitter. Magnesium plays a role in neuromuscular transmission and activity, promoting muscle relaxation. A highly processed 'junk food' diet, excessive alcohol intake, and exhaustive exercise may increase the need for B-1. Suggested Use 1 tablet daily. Ingredients Ingredient Amount Percent Daily Value Thiamin (vitamin B-1) 500 mg 33,333% Magnesium (as magnesium citrate, malate, oxide & succinate) 100 mg 25% Excipients stearic acid, modified cellulose gum, acacia gum, magnesium stearate, and silica. Warnings If you are pregnant, may become pregnant, or breastfeeding, consult your health care professional before using this product. Do not use if either tamper-evident seal is broken or missing. Keep out of the reach of children. Suitable for vegetarians.
B-1 is intimately involved in many aspects of nerve health and function. The active co-enzyme form of B-1, thiamin pyrophosphate (TPP), is necessary for energy production and is essential for the formation of acetylcholine, a major neurotransmitter. Magnesium plays a role in neuromuscular transmission and activity, promoting muscle relaxation. A highly processed 'junk food' diet, excessive alcohol intake, and exhaustive exercise may increase the need for B-1. Suggested Use 1 tablet daily. Ingredients Ingredient Amount Percent Daily Value Thiamin (vitamin B-1) 500 mg 33,333% Magnesium (as magnesium citrate, malate, oxide & succinate) 100 mg 25% Excipients stearic acid, modified cellulose gum, acacia gum, magnesium stearate, and silica. Warnings If you are pregnant, may become pregnant, or breastfeeding, consult your health care professional before using this product. Do not use if either tamper-evident seal is broken or missing. Keep out of the reach of children. Suitable for vegetarians.
B-1 is intimately involved in many aspects of nerve health and function. The active co-enzyme form of B-1, thiamin pyrophosphate (TPP), is necessary for energy production and is essential for the formation of acetylcholine, a major neurotransmitter. Magnesium plays a role in neuromuscular transmission and activity, promoting muscle relaxation. A highly processed 'junk food' diet, excessive alcohol intake, and exhaustive exercise may increase the need for B-1. Suggested Use 1 tablet daily. Ingredients Ingredient Amount Percent Daily Value Thiamin (vitamin B-1) 500 mg 33,333% Magnesium (as magnesium citrate, malate, oxide & succinate) 100 mg 25% Excipients stearic acid, modified cellulose gum, acacia gum, magnesium stearate, and silica. Warnings If you are pregnant, may become pregnant, or breastfeeding, consult your health care professional before using this product. Do not use if either tamper-evident seal is broken or missing. Keep out of the reach of children. Suitable for vegetarians.
B-1 is intimately involved in many aspects of nerve health and function. The active co-enzyme form of B-1, thiamin pyrophosphate (TPP), is necessary for energy production and is essential for the formation of acetylcholine, a major neurotransmitter. Magnesium plays a role in neuromuscular transmission and activity, promoting muscle relaxation. A highly processed 'junk food' diet, excessive alcohol intake, and exhaustive exercise may increase the need for B-1. Suggested Use 1 tablet daily. Ingredients Ingredient Amount Percent Daily Value Thiamin (vitamin B-1) 500 mg 33,333% Magnesium (as magnesium citrate, malate, oxide & succinate) 100 mg 25% Excipients stearic acid, modified cellulose gum, acacia gum, magnesium stearate, and silica. Warnings If you are pregnant, may become pregnant, or breastfeeding, consult your health care professional before using this product. Do not use if either tamper-evident seal is broken or missing. Keep out of the reach of children. Suitable for vegetarians.
in 3 offers
The lowest price for Source Naturals B-1 High Potency 500 MG 100 Tablets right now is $20.30 at desertcart.com.au, compared across 3 retailers.
The all-time low was $14.74 on 11 Jan 2026 — today's price is 38% above the lowest ever. It has been notably cheaper before — worth setting a price alert.
Prices last updated 3 July 2026.
Last updated at 03/07/2026 00:31:53
Source Naturals Vitamin B-1 Thiamin 500mg - High Potency, 500mg - 50 Tablets
Delivery between 9–12 July $29
Source Naturals, Vitamin B-1, High Potency , 500 mg, 100 Tablets
Delivery $40
Source Naturals Vitamin B1 500mg 100 Tablets, Energy & Metabolism Support
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
originally posted on iherb.com
This is a highly indispensable b vitamin. It has greatly helped my gut issues and I love the price and quality it comes in. Also great for energy production through carbohydrate metabolism. I highly recommend. Please click the like button and thank you for doing so. F
originally posted on iherb.com
Nice product, this is my first time of buying this product and it was really very good with great quality and good ingredients in it, the size is also very good, easy to swallow and the supplement has helped me to regain my energy back since i started taken it,i use to have shoulder pain and i was introduced to this product and since i started taken it, l have noticed a lot of change in my body. The pain has reduced . The package came very fast and the taste is nice with high potency. l like this supplement so much because it contain folic acid and no bad side effect. l will definietly order for more. Thank you. please click like button if my review is useful.
originally posted on iherb.com
Purchased to help combat fatigue thats getting me down, on day 2 so its too early to comment on effect yet. The tablets are quite large, I can struggle with swallowing tablets but manage to get these down ok despite the size. Note that these include magnesium citrate which doesnt agree with some people, including me (can cause diarrhea). The dose in these isnt high enough to send me running to the loo but I do note a slight discomfort. If you tend to get constipation then this would be a benefit! Good thing is the pill can be broken in half so I´ll be trying that and taking in 2 doses through the day.Hope this helps, wishing you well on your journey to feeling better.
| Serving Size | 1 Tablet |
| Servings per Container | 100 |
| Amount Per Serving | % Daily Value |
| Thiamin (vitamin B-1) | 500 mg |
Source Naturals Vitamin B-1 Thiamin 500mg - High Potency, 500mg - 50 Tablets
Delivery between 9–12 July $29
Source Naturals, Vitamin B-1, High Potency , 500 mg, 100 Tablets
Delivery $40
Source Naturals Vitamin B1 500mg 100 Tablets, Energy & Metabolism Support
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
This is a highly indispensable b vitamin. It has greatly helped my gut issues and I love the price and quality it comes in. Also great for energy production through carbohydrate metabolism. I highly recommend. Please click the like button and thank you for doing so. F
Nice product, this is my first time of buying this product and it was really very good with great quality and good ingredients in it, the size is also very good, easy to swallow and the supplement has helped me to regain my energy back since i started taken it,i use to have shoulder pain and i was introduced to this product and since i started taken it, l have noticed a lot of change in my body. The pain has reduced . The package came very fast and the taste is nice with high potency. l like this supplement so much because it contain folic acid and no bad side effect. l will definietly order for more. Thank you. please click like button if my review is useful.
Purchased to help combat fatigue thats getting me down, on day 2 so its too early to comment on effect yet. The tablets are quite large, I can struggle with swallowing tablets but manage to get these down ok despite the size. Note that these include magnesium citrate which doesnt agree with some people, including me (can cause diarrhea). The dose in these isnt high enough to send me running to the loo but I do note a slight discomfort. If you tend to get constipation then this would be a benefit! Good thing is the pill can be broken in half so I´ll be trying that and taking in 2 doses through the day.Hope this helps, wishing you well on your journey to feeling better.
Great supplement from a brand that can be trusted. I was very surprised to find B-1 at such a high dose per tablet/capsule. I had no idea until i decided to do a high dose detoxification protocol needing about 1800 mg a day. What a pleasant find at such an affordable price. This vitamin is very vital for adrenal health and other carbohydrate metabolism pathways and i hope to get great results with this. I will be back to update and for now highly recommend this dose for those needing high dose B1. Its very convenient. Please click the like button. Thank you very much
B1 is important.See Nobel Laureate Dr. Linus Pauling best-selling book 'How to live longer and feel better"Every day I take this, plus:. Vitamin C 8000 mg per day ( divided 3 times). Multivitamin. B Complex. Vitamin A 25000 IU. Vit D3 5000 IU. Vit E 1000 IU. Zinc 50 mg. Selenium 200 mcg. Omega 3 2000 mg. Kelp - Iodine 1000 mcg. Calcium/Magnesium tablet
The first vitamin supplement I started taking and immediately felt the effects of was vitamin B1. I used to suffer from hangovers due to my weakness for alcohol, but since I started taking vitamin B1, I have been able to go to work normally the next day without getting drunk. In addition, the mouth ulcers that have always plagued me have been drastically reduced, if not eliminated.
| Serving Size | 1 Tablet |
| Servings per Container | 100 |
| Amount Per Serving | % Daily Value |
| Thiamin (vitamin B-1) | 500 mg |
