Cat’s Claw (Uncaria tomentosa) is a natural whole herb. Supports Immune System Health. Supports Joint Health. Puritan’s Pride’s perservative-free gelatin capsules contain pure milled herb powder. Puritan’s Pride’s Natural Whole Herb products utilize ground plant parts to provide the natural components found in nature. Available in (500 mg) Rapid Release Capsules. No Artificial Color, Flavor or Sweetener, No Preservatives, No Sugar, No Starch, No Milk, No Lactose, No Soy, No Gluten, No Wheat, No Fish, Sodium Free.