Item(s) added to cart

Item(s) not added to cart


Cat's Claw Forte

  • Vegetarian

Content Product # Price
40 Tablets M1182


Cat’s Claw 1:2 and Cat’s Claw Forte Unavailable for Extended Time

Cat’s Claw 1:2 (M6790) and Cat’s Claw Forte (M1182) will be unavailable for an extended period of time. This is due to our inability to source Cat’s Claw herb that meets our stringent quality standards.

Our Cat’s Claw products contain oxinodole alkaloids, particularly pentacyclic oxindole alkaloids (POAs) but are low in the unwanted tetracyclic oxindole alkaloids (TOAs). Specific quality requirements are described below.

We apologize for any inconvenience this may cause. Please rest assured that we are working hard to source quality Cat’s Claw and will have these products back in stock as soon as we are able. In the meantime here are some alternative products to consider:

  • For immune system support, consider Echinacea Premium tablets or liquid, Andrographis Complex tablets, Burdock Complex tablets, or Astragalus Complex tablets.
  • To support immune system function and encourage healthy intestinal flora, consider Gut Flora Complex capsules.
  • To support vitality, consider Ganoderma & Shiitake tablets.*

Cat's Claw contains oxindole alkaloids, particularly the pentacyclic oxindole alkaloids (POAs) and other compounds. This product is standardized to contain 4.0 mg per tablet of POAs to ensure optimal strength and quality, and is low in the unwanted tetracyclic oxindole alkaloids. Cat's Claw Forte may:

  • enhance immune system function
  • promote healthy response to environmental stresses
  • promote the body's normal resistance function
  • support respiratory system health
  • promote vitality*


Suggested Use: 1 tablet 2 – 3 times daily, or as directed.


Additional Therapies



Cat's Claw Quality Issues

Cat’s Claw (Uncaria tomentosa) is an herb traditionally used by the Asháninka Indians of Peru. The tribe recognized two different types of this plant (one was used therapeutically, the other was never used). This difference has been verified phytochemically and two chemotypes have been identified: the preferred chemotype contains only pentacyclic oxindole alkaloids (POAs) speciophylline, mitraphylline, pteropodine, isomitraphylline and isopteropodine; the other chemotype, which was never used, contains the tetracyclic oxindole alkaloids (TOAs) rhynchophylline and isorhynchophylline in addition to the POAs. The preference for the POA chemotype of Cat’s Claw has been validated by scientific research. MediHerb tests each batch of Cat’s Claw to determine that only the preferred chemotype is used to manufacture our Cat’s Claw products. The upper trace of herb, labeled A, was rejected by our quality assurance testing as it contained the TOAs. The bottom trace of herb, labeled B, contains very low levels of TOA and was accepted.

Caution: Contraindicated in pregnancy and lactation.

Supplement Facts
Serving Size: 1 Tablet Servings per Container:  40
Amount per Serving %DV
Calories 2  
Calcium 40 mg 4%
Cat's Claw bark 5:1 extract from Uncaria tomentosa bark 2.1 g
Containing pentacyclic oxindole alkaloids 5.7 mg
233.4 mg

†Daily Value (DV) not established.

Other Ingredients: Cellulose, calcium phosphate, maltodextrin, sodium starch glycollate, magnesium stearate, hypomellose and silica.

For other contraindications and cautions specific to this product, please refer to the Contraindications and Cautions for MediHerb Botanicals.


Please consult the product packaging label for the most accurate product information.

*These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure, or prevent any disease.