Avocado-Soybean Unsaponifiables (ASU)

Also known as: Piascledine · ASU

●●○Moderate Evidence

A patented plant extract (1/3 avocado + 2/3 soybean unsaponifiables) approved as a prescription drug for OA in France. Stimulates cartilage repair and reduces cartilage degeneration.

Effective Dose

300mg / day

per clinical evidence

Evidence Level

Moderate

Joint & Connective Tissue

Mechanism

TGF-β stimulation, MMP inhibition, chondrocyte protection

primary action

Best For

Knee OA

Hip OA, Cartilage repair

This profile is for informational purposes only and does not constitute medical advice. Consult a qualified healthcare professional before starting any supplementation, especially if you have pre-existing conditions or take medications.

What Is Avocado-Soybean Unsaponifiables (ASU)?

ASU is a mixture of lipid fractions extracted from avocado and soybean oils (the 'unsaponifiable' fraction, ~1% of total oil). It is approved as a pharmaceutical drug in France (Piascledine) for OA and is the most evidence-backed specialty joint supplement. It works by stimulating cartilage matrix synthesis rather than just reducing inflammation.

How It Works: The Science

ASU stimulates TGF-β1 production by chondrocytes, promoting collagen type II synthesis and GAG production. It inhibits matrix metalloproteinases (MMPs 1, 3, 13) and IL-1-induced aggrecanase activity, reducing cartilage breakdown. It also inhibits the IL-1-induced suppression of collagen synthesis, reversing one of the key destructive pathways in OA.

Primary Mechanism

TGF-β stimulation, MMP inhibition, chondrocyte protection

Evidence-Based Benefits

Reduces knee and hip OA pain and improves function

moderate

Maheu et al. (1998) — 300mg/day for 6 months significantly reduced pain and NSAID use

May slow structural cartilage degeneration (disease-modifying)

moderate

Lequesne et al. (2002) — trend toward reduced joint space narrowing over 2 years

Dosage Guide

Effective Dose

300mg / day

300mg/day of the 1:2 avocado:soybean unsaponifiable ratio — this specific ratio is what's studied; products should confirm this specification. Take with food.

Safety Profile & Side Effects

Excellent safety profile consistent with its pharmaceutical approval. No significant drug interactions reported.

Who Should (and Shouldn't) Take It

Best for

Knee OAHip OACartilage repair

Who it's for

Those with established OA (particularly knee and hip) wanting a cartilage-regenerative supplement beyond pain management. A premium joint supplement with pharmaceutical-level evidence.

Frequently Asked Questions

What is the recommended dose of Avocado-Soybean Unsaponifiables (ASU)?

300mg/day of the 1:2 avocado:soybean unsaponifiable ratio — this specific ratio is what's studied; products should confirm this specification. Take with food.

Is Avocado-Soybean Unsaponifiables (ASU) safe?

Excellent safety profile consistent with its pharmaceutical approval. No significant drug interactions reported.

How does Avocado-Soybean Unsaponifiables (ASU) work?

Who should take Avocado-Soybean Unsaponifiables (ASU)?

Those with established OA (particularly knee and hip) wanting a cartilage-regenerative supplement beyond pain management. A premium joint supplement with pharmaceutical-level evidence.

Related Ingredients

Glucosamine Sulfate Chondroitin Sulfate Collagen Type II (UC-II)Boswellia Serrata

Medical Disclaimer

Ingredient profiles are for informational purposes only and do not constitute medical advice. Consult a qualified healthcare professional before starting any supplementation, especially if you have pre-existing conditions or take medications. Full disclaimer →