Free deliveryWhy The Wellness recommends this
Curated, not stocked.
Our doctors reach for Methyl-Guard Plus when a patient's blood panel shows raised homocysteine or when an MTHFR variant has been identified. The use of methylated, bioavailable B-vitamin forms — rather than cheaper synthetic precursors — matters here: for people whose genetics impair standard conversion, the active forms are the point. Thorne's reputation for formulation rigour is a further reason this earns a place in our nutrition pillar.
About this product
Methyl-Guard Plus
Methyl-Guard Plus is a methylated B-vitamin complex from Thorne, formulated to support healthy methylation — the biochemical process underpinning DNA repair, neurotransmitter synthesis, and homocysteine metabolism. It combines active, methylated forms of key B vitamins with betaine (trimethylglycine), a well-studied methyl donor that works alongside the B-vitamin pathway to help keep homocysteine levels in a healthy range.
Elevated homocysteine is a common finding on cardiovascular and metabolic blood panels, and is often linked to poor methylation capacity — sometimes genetic (MTHFR variants), sometimes dietary. This formula is suited to those who have been told they carry a common MTHFR polymorphism, or whose bloods show raised homocysteine, as the methylated forms of folate and B12 bypass the conversion steps that these variants impair. It may also suit those with low B12 or folate status identified through testing, or individuals supporting cardiovascular health as part of a broader clinical plan.
Thorne is a brand our clinical team returns to consistently. Their manufacturing standards are well regarded in the supplement industry, and they typically opt for the bioavailable, coenzymated forms of B vitamins rather than cheaper synthetic precursors. For a condition as precisely measurable as homocysteine, choosing a formula built on active ingredients rather than raw vitamins is a meaningful distinction.
What it does
Benefits
- 01
Supports healthy homocysteine metabolism, measured by blood testing
- 02
Provides methylated B vitamins that bypass MTHFR conversion steps
- 03
Betaine acts as an additional methyl donor via the BHMT pathway
- 04
May support cardiovascular health in those with elevated homocysteine
- 05
Suited to those with confirmed B12, folate, or methylation concerns
Get the most from it
How to use
Take 3 capsules daily, as directed on the packaging. B vitamins are generally well tolerated with or without food, though taking them with a meal may reduce the chance of nausea. Avoid taking late in the evening if you find B vitamins affect your sleep.
What's inside
Ingredients
View full ingredient list
Methylated B vitamins, Betaine
Common questions
Frequently asked
What is methylation and why does it matter?
Methylation is a chemical process that happens billions of times per second in the body, involved in DNA repair, gene expression, neurotransmitter production, and detoxification. Poor methylation capacity — often flagged by elevated homocysteine on a blood test — is associated with cardiovascular and neurological health concerns.
Do I need to know my MTHFR status before taking this?
Not necessarily. This formula is particularly relevant for people who carry common MTHFR variants, as it provides folate and B12 in pre-converted, active forms that do not require the MTHFR enzyme to work. However, anyone with elevated homocysteine or low B-vitamin status identified on testing may benefit. If you are unsure, a blood panel is the most useful starting point.
How long before I might see a change in my homocysteine levels?
Homocysteine is best monitored via blood testing. In clinical practice, meaningful changes in homocysteine levels are typically assessed after 8–12 weeks of consistent supplementation, though this varies by individual and baseline levels.
Is this safe to take alongside other B-vitamin supplements?
Combining multiple B-vitamin products can lead to excessive intake of certain vitamins, particularly B6 and B12. Check your full supplement stack and, if in doubt, discuss with a clinician or pharmacist before stacking this with other B-complex or multivitamin products.
Who might not be suitable for this product?
Those who are pregnant or breastfeeding, or who are taking medications that interact with folate or B12 (such as methotrexate), should speak to their doctor before use. Check the packaging for a full list of contraindications.
Doctor-guided care
Test before you supplement.
Bloods are the only way to know what your body actually needs. We'll tell you which of these supplements earn their place.
Book a panelFrom real customers
Reviews
No reviews yet
Be the first to share your experience.
Loading reviews…
