Stack Genius ingredient guide
DMG (Dimethylglycine)
An amino acid derivative that acts as a one-carbon donor in methylation cycles, used in supplements for immune, athletic, and metabolic support.
Overview
Dimethylglycine, usually abbreviated DMG, is a derivative of the amino acid glycine with two methyl groups attached. It sits inside the body's methylation pathways as an intermediate between betaine and sarcosine, feeding one-carbon units into a range of biochemical reactions.
Historically, DMG was marketed as a component of pangamic acid, a controversial ingredient sold decades ago as "vitamin B15." Modern DMG supplements have moved past that framing and are now positioned as methylation-support ingredients used for immune function, energy, and general cellular support.
Human clinical data on DMG are limited and old, with small trials in areas like immune response and epilepsy showing inconsistent results. DMG is a case where mechanism is plausible but reliable outcome evidence is thin, so realistic expectations matter.
Key takeaways
- DMG is an amino acid derivative that participates in methylation cycles.
- It is used in supplements for immune, energy, and cellular support.
- Human trial data are limited and mostly older.
Practical guidance
What to know before adding DMG (Dimethylglycine)
Evidence snapshot
Older, small human trials have looked at DMG for immune response, athletic performance, and seizure frequency, with mixed or negative results. Mechanistic work supports its role in methylation, but there is not a strong body of modern controlled trials to justify strong outcome claims.
What to look for on the label
Look for DMG or dimethylglycine listed by name in milligrams per tablet or capsule, most often 125 to 500 mg. Sublingual or chewable formats are common because DMG absorbs quickly through mucosal tissue. Combination formulas should list the DMG amount separately from other methylation nutrients like folate or B12.
What makes a better product
Better products use a stated DMG dose in a clean formula, avoid heavy sweeteners and colorings that clutter chewables, and separate DMG clearly from B-vitamin methylation ingredients so you can adjust one at a time. Vegetarian and allergen labeling should be visible.
Watch-outs
DMG can affect methylation-sensitive people differently, sometimes leading to overstimulation or anxiety at higher doses. People on methotrexate or other drugs where folate and methyl balance matter should be cautious. Older "vitamin B15" marketing claims are not backed by mainstream evidence.
Dosing & Timing
Typical adult supplement doses are 100 to 500 mg once or twice per day, often taken sublingually before meals. Some athletic protocols use higher amounts pre-exercise. Timing is flexible, though some users find morning or midday dosing better because of any mild stimulating effect.
Safety and interaction context
DMG is generally well tolerated at typical supplement doses. People with mood conditions sensitive to methylation shifts should start low. Use during pregnancy or breastfeeding should be clinician-guided; DMG is usually unnecessary unless there is a clear reason to try it. There are no consistently reported major drug interactions, but overlapping methylation-support supplements can compound effects.
Sources
- MedlinePlus dietary supplementsConsumer framing for supplements.
- NCCIH supplements wiselyGeneral framework.
- PubMed CentralHome for older DMG research.
Track products by ingredient in Stack Genius
Use Stack Genius to connect supplement products back to ingredients, spot overlap, and keep your routine organized.