Homocysteine Supreme Designs for Health | Full Guide

Name: Homocysteine Supreme™
Brand: Designs For Health
SKU: DH-HYS120
Price: 57.49 USD
Availability: InStock

Explore Homocysteine Supreme Designs for Health — a methylated B-complex with TMG and L-serine that supports healthy homocysteine metabolism, methylation, and neurotransmitter balance.

Overview

What Is Homocysteine Supreme Designs for Health?

Homocysteine Supreme™ is a targeted nutritional formula from Designs for Health built around synergistic B vitamins, trimethylglycine (TMG), and L-serine. It is designed to facilitate the efficient metabolism of homocysteine and to support the normal production of its important downstream end products — including the sulfur-containing amino acids taurine and cysteine, and the neurotransmitters norepinephrine and dopamine.

An optimally functioning homocysteine pathway provides methyl and sulfur groups for essential biochemical reactions, such as detoxification, healthy immune function, ideal joint and cartilage structure, and brain and cardiovascular health.* Homocysteine Supreme Designs for Health delivers folate in the bioidentical, bioactive form — (6S)-5-methyltetrahydrofolate — along with methylcobalamin, pyridoxal-5-phosphate, and riboflavin-5-phosphate, ensuring each B vitamin arrives in a form the body can readily use.

How It Works

Supporting Methylation, Homocysteine Balance & Neurotransmitter Production

Homocysteine sits at a critical metabolic crossroads. It can be recycled back to methionine through the methylation (remethylation) pathway — a reaction that depends on folate, Vitamin B12, and riboflavin — or it can be directed down the transsulfuration pathway toward cysteine and glutathione production, a step that requires Vitamin B6. Homocysteine Supreme™ addresses both of these pathways simultaneously.

By supplying methylated B vitamins alongside TMG, which donates a methyl group to homocysteine via a folate-independent enzyme (BHMT), the formula offers multiple complementary routes for maintaining healthy homocysteine levels.* The inclusion of L-serine provides one-carbon units to the folate cycle, further supporting the regeneration of methionine from homocysteine.

This multi-pathway approach also helps sustain adequate S-adenosylmethionine (SAMe) production. SAMe is the body's universal methyl donor and is required for the synthesis of neurotransmitters such as serotonin, dopamine, and norepinephrine — supporting neurotransmitter balance as a natural extension of healthy methylation.*

What's inside

Key ingredients

Folate (as Quatrefolic [6S]-5-methyltetrahydrofolate, glucosamine salt) — 3,400 mcg

Quatrefolic® 5-MTHF is the bioactive, circulating form of folate that directly participates in homocysteine remethylation without requiring metabolic conversion by the MTHFR enzyme. Research strongly supports its role in lowering plasma homocysteine, and it is particularly important for individuals carrying common MTHFR polymorphisms who cannot efficiently convert folic acid to its active form. By donating its methyl group to homocysteine via methionine synthase and Vitamin B12, 5-MTHF helps regenerate methionine and sustain SAMe production — the central methyl donor for DNA methylation, neurotransmitter synthesis, and countless other biochemical reactions.* Clinical randomized controlled trials also demonstrate that adjunctive L-methylfolate at 15 mg/day may significantly support mood in individuals with treatment-resistant depression, highlighting its role in serotonin, dopamine, and norepinephrine synthesis.* Because 5-MTHF bypasses MTHFR, it is especially relevant for the estimated 25–40% of the population with reduced-function MTHFR gene variants.

Vitamin B-12 (as Methylcobalamin [MecobalActive]) — 1,000 mcg

Methylcobalamin is the metabolically active, methyl-donating form of Vitamin B12. It serves as an essential cofactor for methionine synthase, the enzyme that remethylates homocysteine to methionine using 5-MTHF. Research shows that B12 deficiency directly elevates homocysteine, and supplementation with at least 0.4 mg B12 daily lowers homocysteine by approximately 7% as a standalone effect, with greater reductions when combined with folate and B6.* B12 is also required for the one-carbon cycle that generates SAMe, the obligate methyl donor for neurotransmitter synthesis. Deficiency causes neurological symptoms — including depression and cognitive impairment — through impaired SAMe-dependent methylation. Supplementation in deficient individuals reliably supports neurotransmitter synthesis capacity.* The methylcobalamin form is one of the two biologically active cobalamin vitamers and avoids the need for conversion from cyanocobalamin.

Trimethylglycine (TMG) — 900 mg

Trimethylglycine (also known as betaine anhydrous) is the primary non-B-vitamin methyl donor for homocysteine remethylation, working through the BHMT enzyme in the liver — a pathway entirely independent of folate and B12. A meta-analysis of five randomized controlled trials confirms that TMG reliably lowers plasma homocysteine at supplemental doses.* TMG is also used medically (FDA-approved as Cystadane®) for the treatment of genetic homocystinuria. Beyond its direct methylation role, TMG replenishes SAMe through the methionine cycle; SAMe is the obligate methyl donor for synthesis of serotonin, dopamine, and norepinephrine in the brain. By supporting SAMe availability, TMG indirectly sustains neurotransmitter synthesis and mood-related neurochemistry.* Human studies suggest TMG may augment SAMe's effects, consistent with this pathway.

Vitamin B-6 (as Pyridoxal-5-Phosphate) — 10 mg

Pyridoxal-5-phosphate (PLP, or P5P) is the biologically active coenzyme form of Vitamin B6, serving as a cofactor for over 140 enzyme reactions. In the homocysteine pathway, PLP is essential for cystathionine beta-synthase (CBS), the enzyme that initiates the transsulfuration pathway converting homocysteine to cystathionine and then to cysteine. While B6 alone does not reliably lower fasting homocysteine, research indicates it is critical for post-methionine-load homocysteine clearance and acts synergistically with folate and B12.* PLP also enables the transsulfuration pathway to produce glutathione, supporting methionine production for SAMe synthesis.* As the essential coenzyme for decarboxylation reactions, PLP is required for the production of serotonin (from 5-HTP), dopamine (from L-DOPA), and GABA (from glutamate). Without PLP, all three neurotransmitter pathways are impaired, and deficiency is associated with depression and anxiety.* The P5P form bypasses the need for hepatic conversion from pyridoxine.

Riboflavin (as Riboflavin-5-Phosphate) — 30 mg

Riboflavin-5-phosphate (Flavin mononucleotide, or FMN) is the bioactive phosphorylated form of vitamin B2. FMN and its downstream metabolite FAD are obligate cofactors for methylenetetrahydrofolate reductase (MTHFR), the enzyme that converts homocysteine to methionine via the folate cycle. Research, including randomized controlled trials, has shown that riboflavin supplementation lowers homocysteine specifically in individuals homozygous for the common MTHFR 677C→T polymorphism — a genotype-specific effect not seen in wild-type individuals.* By stabilizing MTHFR activity in 677TT carriers, riboflavin supplementation supports methylation flux throughout the one-carbon cycle.* The riboflavin-5-phosphate form is more water-soluble than free riboflavin, though it is dephosphorylated to free riboflavin in the gut prior to absorption.

L-serine — 100 mg

L-serine is a conditionally essential amino acid that serves as the principal endogenous donor of one-carbon units to the folate cycle via the serine hydroxymethyltransferase reaction. Human isotope tracer studies confirm that serine contributes approximately 100% of the one-carbon units for total body homocysteine remethylation under fasting conditions.* L-serine also participates directly in homocysteine catabolism through the transsulfuration pathway and provides the methyl groups ultimately used for DNA, RNA, and protein methylation through the SAMe pathway.* In the nervous system, L-serine is the obligate precursor to D-serine — an endogenous NMDA-receptor co-agonist — and to glycine, both of which critically regulate glutamatergic and glycinergic neurotransmission. L-serine also participates in the biosynthetic pathway for tryptophan, the precursor to serotonin.*

Designs For Health

Homocysteine Supreme™

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Homocysteine Supreme™

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Ideal For

Who May Benefit from Homocysteine Supreme™?

Homocysteine Supreme Designs for Health may be especially relevant for individuals seeking targeted methylation and homocysteine support, including:

Those with MTHFR polymorphisms — The formula supplies 5-MTHF (Quatrefolic®), the bioactive folate that bypasses the MTHFR enzyme entirely, along with riboflavin-5-phosphate to stabilize residual MTHFR activity.*
Individuals interested in cardiovascular and brain health support — An optimally functioning homocysteine pathway plays a role in biochemical reactions related to cardiovascular health, brain health, detoxification, and healthy immune function.*
People focused on neurotransmitter balance — The formula supports the normal production of norepinephrine and dopamine through adequate SAMe, PLP, and methylfolate availability.*
Anyone seeking premium, methylated B vitamins — Every B vitamin in the formula is supplied in its bioactive coenzyme form — methylcobalamin, pyridoxal-5-phosphate, and riboflavin-5-phosphate — for ready utilization by the body.

The product is vegetarian-friendly and made without soy, gluten, or GMOs.

Usage

How to Take Homocysteine Supreme™

Take 2 capsules per day with meals or as directed by your health-care practitioner.

Each bottle contains 120 capsules, providing a 60-day supply at the recommended serving size of 2 capsules.

About the author

Written by Greg Howlett

Greg Howlett

Founder

Greg has spent over a decade helping customers choose the right natural-health products. He personally vets every formula we carry and writes these guides to cut through the marketing noise with practical, experience-based advice.

FAQ

Frequently asked questions

What does Homocysteine Supreme Designs for Health do?

Homocysteine Supreme™ contains synergistic nutrients known to facilitate the efficient metabolism of homocysteine. It maintains a healthy homocysteine pathway, allowing for the normal production of important end products including the sulfur-containing amino acids taurine and cysteine, and the neurotransmitters norepinephrine and dopamine. An optimally functioning homocysteine pathway provides methyl and sulfur groups for biochemical reactions such as detoxification, healthy immune function, ideal joint and cartilage structure, and brain and cardiovascular health.*

Why does this formula include TMG alongside methylated B vitamins?

TMG (trimethylglycine) is the primary non-B-vitamin methyl donor for homocysteine remethylation, working through the BHMT enzyme in the liver — a pathway entirely independent of folate and B12. By including TMG along with methylfolate, methylcobalamin, P5P, and riboflavin-5-phosphate, Homocysteine Supreme™ supports multiple complementary routes for healthy homocysteine metabolism and normal methylation.*

What form of folate is used in Homocysteine Supreme™?

Homocysteine Supreme™ supplies folate as Quatrefolic® (6S)-5-methyltetrahydrofolate, glucosamine salt — the bioidentical, bioactive form of folate. This form does not require conversion by the MTHFR enzyme, making it especially important for individuals with common MTHFR gene variants who may not efficiently convert synthetic folic acid to its active form.

Is Homocysteine Supreme™ suitable for vegetarians?

Yes. Homocysteine Supreme™ is vegetarian-friendly and is made without soy, gluten, or GMOs.

How many capsules are in each bottle, and what is the recommended serving?

Each bottle contains 120 capsules. The recommended serving size is 2 capsules per day, taken with meals or as directed by your health-care practitioner, providing a 60-day supply.

How does Homocysteine Supreme™ support neurotransmitter balance?

The formula supports normal neurotransmitter production through several mechanisms. Pyridoxal-5-phosphate (P5P) is the essential coenzyme for synthesis of serotonin, dopamine, and GABA. Methylfolate and methylcobalamin sustain SAMe production — SAMe is the obligate methyl donor required for serotonin, dopamine, and norepinephrine synthesis. TMG further supports SAMe availability by replenishing methionine through the methylation cycle.* Together, these nutrients help maintain healthy neurotransmitter balance.*

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