Solgar N-Acetyl Cysteine vs Multivita Milk Thistle

Q: Is Solgar N-Acetyl Cysteine worth the price compared to Multivita Milk Thistle?

Solgar N-Acetyl Cysteine scores 70.0/100 for value, while Multivita Milk Thistle scores 80.0/100. Multivita Milk Thistle delivers better value overall.

Side-by-side comparison of scores, ingredients, prices and real customer feedback for Solgar N-Acetyl Cysteine and Multivita Milk Thistle.

Last verified: 01 Mar 2026 · Based on 34 reviews

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Our Verdict: Solgar N-Acetyl Cysteine or Multivita Milk Thistle?

— AIScored Editorial Team

80.0

Score Summary

Solgar N-Acetyl Cysteine scores 80.0/100 vs Multivita Milk Thistle at 64.0/100. Solgar N-Acetyl Cysteine wins on effectiveness, ingredient quality, side effects. Multivita Milk Thistle is stronger on value for money.

Solgar N-Acetyl Cysteine vs Multivita Milk Thistle: What Does the Data Say?

These two products approach liver support from entirely different angles. Solgar's NAC works upstream in the body's detox pathway — it's a precursor to glutathione, your primary antioxidant, and at 600mg free-form it matches the doses used in clinical research. Multivita's Milk Thistle works differently, delivering silymarin directly to liver cells to reduce inflammation and aid regeneration. At 80% silymarin standardisation, the active compound concentration is genuinely high, though the serving size isn't specified in the product data.

Solgar scores 80/100 at £25.20 and is the stronger pick for anyone dealing with respiratory mucus, oxidative stress, or wanting clinically-backed glutathione support. It's also fully vegan-certified. Multivita scores 64/100 at £8.95 and suits someone wanting straightforward, affordable liver maintenance — particularly after periods of heavier drinking or as a general tonic.

Practically speaking, NAC has a noticeable sulphurous smell that puts some people off — Solgar reviewers suggest refrigerating it. Multivita tablets reportedly go down easily with no aftertaste. Neither product carries third-party testing certification, so neither is suitable for competitive athletes subject to anti-doping rules.

How Do the Scores Compare?

N-Acetyl Cysteine 600mg Fre...

Milk Thistle Tablets 80% Si...

	N-Acetyl Cysteine 600mg Fre... Solgar	Milk Thistle Tablets 80% Si... Multivita
Overall Score	80.0	64.0
Effectiveness	83.0/100 Best	63.0/100
Ingredient Quality	82.0/100 Best	68.0/100
Value for Money	70.0/100	80.0/100 Best
Side Effects	88.0/100 Best	87.0/100
Certifications	66.0/100 Best	28.0/100
Best Price	£25.20 Amazon UK →	£6.99 Amazon UK → Cheapest
Price per Serving	£0.42 60 servings	N/A
Form	Vegetable Capsule	‎Tablet
Dose	600mg	None
Third-Party Tested	✗ No	✗ No
Reviews Analysed	20	14

N-Acetyl Cysteine 600mg Free For...

Pros

✓Strong user-reported evidence for mucus reduction and respiratory support
✓Well-researched ingredient — NAC is clinically backed for liver support, glutathione synthesis, and antioxidant defence
✓600mg is a standard effective clinical dose in free-form for better absorption
✓Reputable brand with clean, allergen-free, vegan and Kosher-certified formulation

Cons

✗No independent third-party testing (NSF, Informed Sport) disclosed
✗NAC's characteristic sulphurous odour noted by several reviewers — refrigeration recommended
✗May disrupt sleep if taken in the evening — morning dosing advised
✗Premium brand pricing offers moderate value versus lower-cost NAC alternatives on the market

Best For

People seeking liver detox and glutathione support Those with chronic respiratory issues or excess mucus production Vegans and vegetarians needing a certified animal-free NAC supplement Individuals sensitive to gluten, dairy, or soya allergens Those interested in antioxidant support and cellular health

Amazon UK £25.20 Holland & Barrett £27.99

View full review →

Milk Thistle Tablets 80% Silymar...

Pros

✓High silymarin standardisation (80%) ensures potent active compound delivery per tablet
✓Repeatedly praised for easy swallowing and no aftertaste
✓Considered excellent value for money with a 2-month supply
✓UK-manufactured, implying compliance with UK GMP standards

Cons

✗One verified report of receiving only 96 tablets instead of the advertised 120
✗No third-party testing or certification disclosed
✗Vegan claim in description conflicts with product spec data (unverified)
✗No clinical outcomes data or brand transparency regarding raw material sourcing

Best For

Adults seeking general liver support or post-alcohol detox Budget-conscious supplement users wanting high silymarin standardisation Vegans and vegetarians (per label claim, pending spec verification) Those unable to swallow large capsules looking for tablet alternatives

Amazon UK £6.99

View full review →

Score Breakdown: Solgar N-Acetyl Cysteine vs Multivita Milk Thistle

Solgar N-Acetyl Cysteine Winner 80.0/100

Solgar's NAC 600mg delivers N-Acetyl Cysteine in free-form for improved bioavailability — a well-researched glutathione precursor with strong science behind liver detoxification, antioxidant defence, and mucolytic activity.

Effectiveness

N-Acetyl Cystein..

83.0/100

Milk Thistle Tab..

63.0/100

Ingredient Quality

N-Acetyl Cystein..

82.0/100

Milk Thistle Tab..

68.0/100

Value for Money

N-Acetyl Cystein..

70.0/100

Milk Thistle Tab..

80.0/100

Side Effects

N-Acetyl Cystein..

88.0/100

Milk Thistle Tab..

87.0/100

Certifications

N-Acetyl Cystein..

66.0/100

Milk Thistle Tab..

28.0/100

What are the key differences?

Solgar N-Acetyl Cysteine is best for: People seeking liver detox and glutathione support, Those with chronic respiratory issues or excess mucus production

Multivita Milk Thistle is best for: Adults seeking general liver support or post-alcohol detox, Budget-conscious supplement users wanting high silymarin standardisation

Frequently Asked Questions

Which is better, Solgar N-Acetyl Cysteine or Multivita Milk Thistle? ▼

Solgar wins with an 80/100 score versus Multivita's 64/100, backed by stronger clinical evidence for glutathione synthesis and a properly dosed 600mg free-form NAC. Budget shoppers doing a general liver cleanse may prefer Multivita at £8.95 for two months, though its lower effectiveness rating reflects less robust user evidence. Solgar N-Acetyl Cysteine scores 80.0/100 overall while Multivita Milk Thistle scores 64.0/100. Solgar N-Acetyl Cysteine comes out ahead, scoring higher on effectiveness (83.0 vs 63.0). Solgar N-Acetyl Cysteine is best suited for People seeking liver detox and glutathione support and Those with chronic respiratory issues or excess mucus production. Multivita Milk Thistle is better for Adults seeking general liver support or post-alcohol detox and Budget-conscious supplement users wanting high silymarin standardisation.

Is Solgar N-Acetyl Cysteine worth the price compared to Multivita Milk Thistle? ▼

Solgar N-Acetyl Cysteine costs £25.20 while Multivita Milk Thistle is £6.99. For value, Solgar N-Acetyl Cysteine scores 70.0/100 vs Multivita Milk Thistle's 80.0/100. Multivita Milk Thistle delivers better value relative to its quality. Note that Solgar N-Acetyl Cysteine comes as vegetable capsule while Multivita Milk Thistle is ‎tablet, which may affect your preference.

Which has fewer side effects? ▼

Solgar N-Acetyl Cysteine scores 88.0/100 for side effects (higher means fewer reported issues) while Multivita Milk Thistle scores 87.0/100. Reviewers report fewer side effects with Solgar N-Acetyl Cysteine. For certification and testing, Solgar N-Acetyl Cysteine scores 66.0/100 vs Multivita Milk Thistle's 28.0/100. Always consult a healthcare professional before starting any supplement.