Supplement·Interactions·Reviewed June 9, 2026
Vitamin B1 interactions.
Vitamin B1 has 7 documented interactions in the NutriStack database: 1 to avoid or watch closely and 6 that work synergistically. The full list, with what each pairing does, is below.
Vitamin B1 at a glance.
A quick, data-grounded summary. The full table is below.
Vitamin B1 has 7 documented interactions in the NutriStack database: 1 to avoid or watch closely and 6 that work synergistically. The full list, with what each pairing does, is below.
Everything that interacts with vitamin b1.
Every supplement and medication in the NutriStack database with a documented interaction with this substance, highest-severity first. Open any pair for the mechanism and sources.
| Substance | Interaction | What happens |
|---|---|---|
| Alcohol | Conflict | Chronic alcohol intake depletes thiamine (B1) and impairs its absorption and activation, raising the risk of Wernicke encephalopathy and Korsakoff... details → |
| Furosemide | Synergy | Long-term furosemide therapy can increase urinary thiamine loss and has been linked with biochemical Vitamin B1 deficiency, especially in heart... details → |
| Magnesium Citrate | Synergy | Magnesium is required for thiamine (B1) utilization. Magnesium deficiency impairs thiamine-dependent enzyme activity. |
| Magnesium Glycinate | Synergy | Magnesium is required for thiamine (B1) utilization. Magnesium deficiency impairs thiamine-dependent enzyme activity. |
| Magnesium L-Threonate | Synergy | Magnesium is required for thiamine (B1) utilization. Magnesium deficiency impairs thiamine-dependent enzyme activity. |
| Magnesium Malate | Synergy | Magnesium is required for thiamine (B1) utilization. Magnesium deficiency impairs thiamine-dependent enzyme activity. |
| Magnesium Taurate | Synergy | Magnesium is required for thiamine (B1) utilization. Magnesium deficiency impairs thiamine-dependent enzyme activity. |
The full vitamin b1 profile.
Benefits, dosing by goal, forms, and the cited evidence for this supplement.
Common vitamin b1 questions.
Quick answers drawn from the table above.
What interacts with Vitamin B1?
In the NutriStack database, Vitamin B1 has 7 documented interactions with other supplements and medications. The most notable include Alcohol, Furosemide, Magnesium Citrate, Magnesium Glycinate, and Magnesium L-Threonate.
What should you not take with Vitamin B1?
Vitamin B1 is flagged against 1 substance in the database, including Alcohol. Review these with a clinician before combining, especially alongside prescription medications.
What works well with Vitamin B1?
Vitamin B1 pairs synergistically with Furosemide, Magnesium Citrate, Magnesium Glycinate, Magnesium L-Threonate, and Magnesium Malate in the NutriStack database. Synergy still depends on dose and timing; open any pair for the detail.
Can you take Vitamin B1 with Alcohol?
NutriStack classifies the Vitamin B1 and Alcohol pairing as conflict: Chronic alcohol intake depletes thiamine (B1) and impairs its absorption and activation, raising the risk of Wernicke encephalopathy and Korsakoff syndrome. Do not treat alcohol use as safe. If alcohol is consumed regularly, arrange thiamine repletion under medical supervision, and seek medical advice...
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