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Saccharomyces Boulardii vs Vitamin B12 — Which Should You Take?

Saccharomyces Boulardii

herbs

Typically £8–£25/month

Vitamin B12

vitamins

Typically £8–£25/month
Feature
Saccharomyces Boulardii
Vitamin B12
Typical Dosage
250-500 mg (5-10 billion CFU) daily
500-1,000mcg daily
Best Form
Capsule
Methylcobalamin
Key Benefits
5 listed
5 listed
Evidence Rating
★★★★
★★★★
Best Time
With or between meals; separate from antibiotics by 2+ hours
Morning — may be energising
Upper Limit
1000 mg (20 billion CFU) daily in divided doses
No established upper limit (water-soluble)
Side Effects
2 noted
2 noted

Saccharomyces Boulardii Benefits

Reduces antibiotic-associated diarrhoea and Clostridium difficile infection risk
Supports intestinal barrier function and reduces intestinal permeability
Enhances immune response through increased IgA production in the gut
Alleviates symptoms of traveller's diarrhoea and acute infectious gastroenteritis
Promotes beneficial microbial balance and inhibits pathogenic bacteria adhesion

Vitamin B12 Benefits

Energy production
Nerve function and protection
Red blood cell formation
DNA synthesis
May reduce homocysteine levels

Saccharomyces Boulardii Side Effects

Mild gastrointestinal disturbance (bloating, constipation) during initial use
Rare fungal infections in severely immunocompromised individuals

Vitamin B12 Side Effects

Very safe — excess excreted in urine
Rare: acne at very high doses in some individuals

Can You Take Saccharomyces Boulardii and Vitamin B12 Together?

In most cases, Saccharomyces Boulardii and Vitamin B12 can be taken together safely. However, always check the interactions section of each supplement and consult a healthcare professional if you take medication or have existing health conditions.

Saccharomyces Boulardii: Significantly reduced efficacy if taken within 2 hours of antibiotics

Saccharomyces Boulardii: May interact with antifungal medications (fluconazole, itraconazole)

Vitamin B12: Metformin reduces B12 absorption — supplement if on metformin

Vitamin B12: Proton pump inhibitors (PPIs) reduce absorption

Which Should You Choose?

Choose Saccharomyces Boulardii if your primary goal is: reduces antibiotic-associated diarrhoea and clostridium difficile infection risk. Choose Vitamin B12 if your primary goal is: energy production.

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Frequently Asked Questions

Is Saccharomyces Boulardii better than Vitamin B12?

It depends on your goals. Saccharomyces Boulardii and Vitamin B12 serve different purposes and are often taken together.

Can I take Saccharomyces Boulardii and Vitamin B12 together?

In most cases, yes. Saccharomyces Boulardii and Vitamin B12 can be taken together safely. However, always check for specific interactions and consult a healthcare professional if you take medication.

What is the best time to take Saccharomyces Boulardii?

With or between meals; separate from antibiotics by 2+ hours

What is the best time to take Vitamin B12?

Morning — may be energising

What are the side effects of Saccharomyces Boulardii?

Mild gastrointestinal disturbance (bloating, constipation) during initial use. Rare fungal infections in severely immunocompromised individuals.

What are the side effects of Vitamin B12?

Very safe — excess excreted in urine. Rare: acne at very high doses in some individuals.

How We Compare Supplements

This comparison is based on published clinical research, peer-reviewed studies from PubMed, and established nutritional science. We evaluate dosages based on clinically-effective amounts, not manufacturer recommendations. Benefits listed have at least moderate evidence from human studies. When evidence is limited or conflicting, we note this.

Disclaimer: This comparison is for educational purposes only and is not medical advice. Always consult a qualified healthcare professional before starting any supplement, especially if you take medication or have existing health conditions.

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