Microcrystalline cellulose 102 is the most commonly used form of the product due the best combination of physical properties. Higher-density grades have improved flowability. The larger-particle-size grades generally provide better flow properties in pharmaceutical machinery. Low-moisture grades are used with moisture-sensitive materials. Several co-processed mixtures of microcrystalline cellulose with other excipients such as magnesium stearate, carboxymethylcellulose sodium, and guar gum are available for specific applications.