FITGIRL / Ingredient library
MSM · methylsulfonylmethane
Content reviewed:
Ingredient information is not a product efficacy study. A publication, traditional use or a link to an ingredient does not authorise a health claim. [4]
Identity & classification
An organic sulfur compound, also called dimethyl sulfone. [1] [2]
Natural origin
Distinct from dietary protein and from the related solvent DMSO. A sulfur-containing name does not identify a plant source. [1] [2]
History & background
The modern ingredient name distinguishes a defined substance or preparation from its source material. The cited specification or technical source documents this distinction; no historical use of the FitGirl formula is implied. [1] [2]
Production methods
A purified ingredient is used in supplements. FitGirl’s synthesis route and purity certificate are not available for verification. [1] [2]
FitGirl raw material: the supplier, country of origin, batch specification and manufacturing process have not been independently verified. General production methods below do not establish the origin of this product.
Nutritional properties
Its declared mass is a substance quantity, not a protein, vitamin or mineral reference intake. [1] [2]
Food & sports nutrition
Read its role alongside the complete product composition. A technological ingredient or an unquantified component is not a separate sports-nutrition recommendation. [1] [2]
Research & limitations
The sources describe ingredient identity and composition. They do not test this FitGirl formula. Dose, preparation, study population and outcome must match before research can be interpreted for a particular product; legal authorisation is a separate requirement. [1] [2]
Approved health claims
No health benefit is claimed here for this ingredient. An ingredient’s presence alone does not establish an authorised product claim. [3] [4] [5]
Scientific references & product sources
- NCCIH (n.d.). Dimethyl Sulfoxide (DMSO) and Methylsulfonylmethane (MSM)
- European Parliament and Council (2011). Regulation (EU) No 1169/2011 — Articles 7, 14; Annexes II, XIII, XIV
- European Commission (2012; consolidated 2025). Regulation (EU) No 432/2012 — Annex: authorised health claims and conditions
- European Parliament and Council (2006). Regulation (EC) No 1924/2006 — Articles 5, 6, 10, 28 and Annex
- European Commission (2026). EU Register of nutrition and health claims
