Holland barrett glucosamine chondroitin msm tablets these tablets contain glucosamine chondroitin and methylsulphonylmethane msm msm is a naturally occurring source of sulphur one of the major building blocks of glycosaminoglycans 60 coated caplets holland barrett glucosamine chondroitin msm tablets these tablets contain glucosamine chondroitin and methylsulphonylmethane msm msm is a naturally occurring source of sulphur one of the major building blocks of glycosaminoglycans