What kind of interaction is it?

Synergy: a documented combination effect that is stronger or more useful than either substance taken alone.

Is this interaction backed by published research?

Yes. NutriStack lists 2 citation rows for the Milk Thistle + NAC pair, each linking to PubMed by PMID where available. Full sourcing methodology at https://nutristackapp.com/methodology/interactions.

Interaction databaseSupplement × SupplementReviewed May 2026

Milk Thistle and NAC, a synergy.

Q: Can I take Milk Thistle and NAC together?

Yes. The combination of Milk Thistle and NAC produces a measurable benefit. Both support liver health through glutathione-related mechanisms. NAC provides glutathione precursor; silymarin protects liver cells and supports glutathione levels.

Q: How does this affect a NutriStack Stack Score?

+2 to your Stack Score per scored synergy row.

Both support liver health through glutathione-related mechanisms. NAC provides glutathione precursor; silymarin protects liver cells and supports glutathione levels.

2 primary source citations. Moderate evidence. Last verified May 30, 2026.

Open the interaction checker →Read the methodology

One pair, every claim cited. The two substances, the type, the mechanism, the recommendation, and the primary literature.
Same shape as the other 1,729 pairs in the public database.

Sourcing standards·Evidence tiers

From the interaction database

What the row says.

Every entry follows the same shape: what is happening, the mechanism, the recommendation, and the primary literature.

At a glance

Substances: Milk Thistle and NAC
Pair type: Synergy
Evidence (highest tier): Moderate
Source citations: 2 sources
Stack Score effect: +2 to your Stack Score (per scored synergy row).
Scope: Supplement × Supplement
Last verified: May 30, 2026

Synergy · Moderate evidence

Synergy

What is happening. Both support liver health through glutathione-related mechanisms. NAC provides glutathione precursor; silymarin protects liver cells and supports glutathione levels.

Mechanism. NAC replenishes hepatic glutathione stores. Silymarin (from milk thistle) inhibits lipid peroxidation in hepatocyte membranes, promotes ribosomal RNA synthesis for liver regeneration, and independently raises glutathione levels.

Recommendation. Effective liver support combination. Take together for hepatoprotective benefit.

Sources (2)

Abenavoli L et al. Milk thistle in liver diseases. Phytother Res. 2010
Fogacci F, Grassi D, Rizzo M, Cicero AFG. Metabolic effect of berberine-silymarin association: A meta-analysis of randomized, double-blind, placebo-controlled clinical trials. Phytotherapy Research. 2019. PMID 30632209

Stack Score

How this pair moves the number.

Effect on the composite score

If both Milk Thistle and NAC are in the same stack, this pair applies +2 to your Stack Score (per scored synergy row).

The full algorithm, the clamping rules, and four worked stacks are documented at /methodology/stack-score.

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