Comparison

M.S.M. Methylsulfonylmethane and MSM Powder Methylsulphonylmethane

M.S.M. Methylsulfonylmethane (New Sun) lists 1 distinct ingredients and MSM Powder Methylsulphonylmethane (NOW) 1 (rows of one ingredient counted once); 1 are on both labels. On the site's similarity measure, which compares ingredient lists (1 for the same list, rarer ingredients counting for more; amounts are not part of it), the two formulas score 1.00: the same ingredients, at the amounts in the table below.

Amount per serving (and % of the Daily Value)
IngredientM.S.M. MethylsulfonylmethaneMSM Powder Methylsulphonylmethane
Methylsulfonylmethane1,800 mg1,800 mg

Amounts are per serving as DSLD gives them: M.S.M. Methylsulfonylmethane, 0.5 tsp; MSM Powder Methylsulphonylmethane, 0.5 tsp. Current labels entered September 2019 and October 2012. Percentages of the Daily Value from 21 CFR 101.9. Source: NIH ODS Dietary Supplement Label Database.

Each product on its own