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TMG (Trimethylglycine) vs Vitamin B12 — Which Should You Take?

TMG (Trimethylglycine)

amino acids

Typically £8–£25/month

Vitamin B12

vitamins

Typically £8–£25/month
Feature
TMG (Trimethylglycine)
Vitamin B12
Typical Dosage
500-2000 mg daily
500-1,000mcg daily
Best Form
TMG powder
Methylcobalamin
Key Benefits
5 listed
5 listed
Evidence Rating
★★★★
★★★★
Best Time
With meals for optimal absorption; divide doses throughout the day
Morning — may be energising
Upper Limit
3000 mg daily
No established upper limit (water-soluble)
Side Effects
3 noted
2 noted

TMG (Trimethylglycine) Benefits

Supports homocysteine metabolism and cardiovascular health
Enhances cellular methylation processes
May improve exercise performance and endurance
Supports liver function and detoxification
Potential cognitive and mood support benefits

Vitamin B12 Benefits

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

TMG (Trimethylglycine) Side Effects

Fishy body odour (rare, dose-dependent)
Mild gastrointestinal upset at higher doses
Potential slight increase in blood pressure in sensitive individuals

Vitamin B12 Side Effects

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

Can You Take TMG (Trimethylglycine) and Vitamin B12 Together?

In most cases, TMG (Trimethylglycine) 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.

TMG (Trimethylglycine): May interact with blood pressure medications; monitor if taking antihypertensives

TMG (Trimethylglycine): Potential interaction with folate and B12 metabolism—ensure adequate B-vitamin status

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

Vitamin B12: Proton pump inhibitors (PPIs) reduce absorption

Which Should You Choose?

Choose TMG (Trimethylglycine) if your primary goal is: supports homocysteine metabolism and cardiovascular health. Choose Vitamin B12 if your primary goal is: energy production.

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Frequently Asked Questions

Is TMG (Trimethylglycine) better than Vitamin B12?

It depends on your goals. TMG (Trimethylglycine) and Vitamin B12 serve different purposes and are often taken together.

Can I take TMG (Trimethylglycine) and Vitamin B12 together?

In most cases, yes. TMG (Trimethylglycine) 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 TMG (Trimethylglycine)?

With meals for optimal absorption; divide doses throughout the day

What is the best time to take Vitamin B12?

Morning — may be energising

What are the side effects of TMG (Trimethylglycine)?

Fishy body odour (rare, dose-dependent). Mild gastrointestinal upset at higher doses. Potential slight increase in blood pressure in sensitive 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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