• Alcohol: Reduces Thiamine absorption by at least 50%.
• High-heat cooking: Destroys Thiamine, especially with added alkalines like baking soda.
• Coffee and tea: Act as diuretics and contain compounds that reduce Thiamine.
• Raw seafood: Contains enzymes that break down Thiamine in the gut.
• Preservatives: Sulfites in wine and processed foods destroy Thiamine.

Medications and Thiamine Loss

Several common medications interfere with B1 absorption or increase its excretion:

• Antacids and proton pump inhibitors: Reduce stomach acid needed for absorption.
• Diuretics: Increase Thiamine loss through urine.
• Metformin: Can lower Thiamine levels, though often prescribed long-term.

These drugs may be necessary, but their effects on nutrients should be considered.

The Kidney and Heart Connection

Kidney health directly affects how your body retains Thiamine. High blood pressure — often caused by too much sodium from processed foods — damages the kidneys and accelerates nutrient loss. Many people with early-stage kidney disease don’t even know they have it, making this a silent contributor to Thiamine depletion.

Heavy metals, gut issues like chronic diarrhea or IBD, and aging (which lowers stomach acid production) also make it harder to absorb or use Thiamine properly.

Beyond Thiamine: Other Key Nutrients for Brain Health

While B1 is crucial, it’s part of a bigger picture. Other nutrients are also essential for long-term brain and body health:

• Vitamin D: More hormone than vitamin, it influences brain function, mood, and memory. Low levels are linked to dementia. But for Vitamin D to work properly, you need magnesium, zinc, boron, and Vitamin K2.
• Omega-3 Fatty Acids: Especially DHA and EPA, which make up a large portion of brain fat. They enhance memory, improve mood, reduce inflammation, and protect neurons. A lack of Omega-3s is associated with depression and poor sleep.

A Smarter Approach to Aging

Rather than waiting for illness to appear, we should focus on prevention. That starts with understanding how nutrients like Thiamine and others influence our brain and body. Whole foods, not just supplements, provide the full spectrum of what our bodies need.

By staying informed and making small dietary and lifestyle changes, we can improve brain health, delay cognitive decline, and increase our chances of aging with clarity and vitality.