A complete safety, timing, and dosage guide for combining MSM (Methylsulfonylmethane) with Vitamin B9 (Folate, Folic Acid, Methylfolate) — including how the two supplements interact, the best time of day to take each, and which populations should be careful.
Yes, you can safely take Vitamin B9 (Folate) and MSM together; they do not interact and can be taken at the same time.
Vitamin B9 (Folate) and MSM together are safe for daily use. They work through different pathways—folate supports methylation and cell division, while MSM provides dietary sulfur for connective tissue. No adverse interactions have been reported.
Folate is a water-soluble B vitamin absorbed primarily in the upper small intestine via the proton-coupled folate transporter. MSM is a small organic sulfur compound that is absorbed passively across the intestinal wall without requiring any specific carrier. These two molecules do not share transport proteins, receptors, or metabolic pathways. Folate participates in one-carbon metabolism and methylation cycles, whereas MSM acts as a sulfur donor for the synthesis of sulfur-containing amino acids like methionine and cysteine. Neither compound appears to affect the other's absorption, distribution, or clearance in the body, and no drug-transporter or cytochrome P450 interactions have been identified.
Take both Vitamin B9 and MSM in the morning with a meal that includes some protein and healthy fat to support absorption and minimize any GI discomfort. A standard approach is 400–800 mcg of folate as methylfolate (or folic acid) plus 1–3 grams of MSM divided into two doses if you are sensitive. There is no need to space them apart; you can swallow both capsules together or add MSM powder to a glass of water and take your folate capsule at the same time. If you miss a morning dose, take it with lunch, but avoid taking it late in the evening to keep your sleep unaffected. For best sulfur utilization, dissolve MSM in water and consume it with a small amount of vitamin C, though this is optional.
No significant interaction difference exists among folate forms (folic acid, methylfolate, folinic acid) and MSM. However, if you have an MTHFR polymorphism, methylfolate may be more effective for raising active folate levels, but this is independent of MSM. MSM is available as a powder, capsule, or tablet; the form you choose does not affect the interaction with folate, though powder may be easier to dose adjust for GI tolerance.
This pair is not commonly bundled in a single commercial product, but folate is standard in prenatal and methylation-support stacks, while MSM appears in joint-health formulas alongside glucosamine and chondroitin, so you may encounter them separately and decide to combine them.
Yes, you can take them at the same time. They do not compete for absorption, so a single dose with food is perfectly fine.
Yes, it is safe to combine them every day in typical supplement doses. I recommend following the dosages on the labels and checking with your doctor if you have any health conditions.
No wait time is needed. You can take them together in the same meal or within a few minutes of each other.
No, they do not compete. Folate is absorbed through specific carriers in the upper small intestine, while MSM crosses the gut wall by passive diffusion. Their pathways are completely separate.
Most people can take them together. If you are on anticonvulsants or certain cancer treatments, check with your doctor about folate, and if you have kidney stones or a sulfur sensitivity, talk to your clinician before adding MSM.
I recommend taking both with food. Folate absorbs well with meals, and MSM can be slightly irritating to an empty stomach, so taking them with breakfast or lunch improves tolerance.
Reviewed by Caroline M. on June 2, 2026 for accuracy against the sources listed above. This page is educational and is not a substitute for professional medical advice.
The matrix has 86 supplements and 7310 pairwise interactions. Click any cell to see the full breakdown.