MSM stands for Methylsulfonylmethane. It is a Sulphur-based chemical compound found in green plants, animals, and humans. It can also be made in a laboratory. MSM is a compound that is found in both plants and animals. Clinically it is often used as a supplement that helps alleviate certain medical conditions, like arthritis.

You can tell you are smoking MSM when it is heated, it will produce a cracking and sizzling sound as it burns up. When heated it turn ou to be a runny liquid. When smoked MSM may cause some symptoms like nausea, diarrhea, bloating, fatigue, headache, insomnia, itching, or worsening of allergy symptoms.
When it re-crystalizes, it will take longer if there is MSM mixed into the drug. Additionally, when it does re-solidify, the patterns that are created will look different.

MSM is also used by meth drug sellers as an additive to add more weight to the meth drug. Since its white like meth and easily detected it becomes a choice of meth dealers. In most instances a meth user will not tell if meth has been supplemented with MSM and doesn’t have any serious side effects. The difference comes when meth is heated.