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Cheapest Milk Thistle Seed Extract (Silybum marianum) Standardized to 80% Silymarin on iHerb

Ranked by real cost per 100 mg of Milk Thistle Seed Extract (Silybum marianum) Standardized to 80% Silymarin — cheapest value first.

Prices updated Jul 25, 2026 · 25 products · Prices in USD

The priciest option here costs about 14,320.3× more per 100 mg of Milk Thistle Seed Extract (Silybum marianum) Standardized to 80% Silymarin than the best-value pick Nature's Truth. For the same daily dose, choosing by cost per unit instead of sticker price can meaningfully cut your yearly spend.
#ProductDoseServingsPrice (USD)Cost per 100 mg
1
Nature's Truth, Milk Thistle Seed, 1,000 mg, 100 Quick Release Capsules
Nature's Truth, Milk Thistle Seed, 1,000 mg, 100 Quick Release Capsules
Nature's Truth
1,000 mg10012.750.013View on iHerb →
2
Sundance Vitamins, Milk Thistle, 1,000 mg, 60 Quick Release Capsules
Sundance Vitamins, Milk Thistle, 1,000 mg, 60 Quick Release Capsules
Sundance Vitamins
1,000 mg607.790.013View on iHerb →
3
Futurebiotics, Detox™, Daily Liver Support, 60 Vegetarian Capsules
Futurebiotics, Detox™, Daily Liver Support, 60 Vegetarian Capsules
Futurebiotics
350 mg3019.250.183View on iHerb →
4
Nutricology, Milk Thistle Seed Complex, 120 Vegetarian Capsules
Nutricology, Milk Thistle Seed Complex, 120 Vegetarian Capsules
Nutricology
200 mg12050.390.210View on iHerb →
5
LifeTime Vitamins, Advanced Milk Thistle, 120 Capsules
LifeTime Vitamins, Advanced Milk Thistle, 120 Capsules
LifeTime Vitamins
250 mg4021.390.214View on iHerb →
6
LifeTime Vitamins, Advanced Milk Thistle, 90 Capsules
LifeTime Vitamins, Advanced Milk Thistle, 90 Capsules
LifeTime Vitamins
250 mg3017.090.228View on iHerb →
7
BodyGold, Liver Clenz, 60 VegCaps
BodyGold, Liver Clenz, 60 VegCaps
BodyGold
200 mg3014.690.245View on iHerb →
8
DaVinci Laboratories, Hepaticlear, 60 Capsules
DaVinci Laboratories, Hepaticlear, 60 Capsules
DaVinci Laboratories
200 mg6036.720.306View on iHerb →
9
Host Defense, Mushrooms™, MycoBotanicals®, Liver, 60 Capsules
Host Defense, Mushrooms™, MycoBotanicals®, Liver, 60 Capsules
Host Defense
230 mg3023.970.347View on iHerb →
10
Doctor's Best, Glutathione + Milk Thistle , 60 Veggie Caps
Doctor's Best, Glutathione + Milk Thistle , 60 Veggie Caps
Doctor's Best
250 mg3029.990.400View on iHerb →
11
Natural Balance, Liver Clenz, 60 VegCaps
Natural Balance, Liver Clenz, 60 VegCaps
Natural Balance
300 mg2026.890.448View on iHerb →
12
Hydralyte, HydraLyte Plus® +Liver Support, Blood Orange Ginger, 12.98 oz (368 g)
Hydralyte, HydraLyte Plus® +Liver Support, Blood Orange Ginger, 12.98 oz (368 g)
Hydralyte
250 mg4046.990.470View on iHerb →
13
Solaray, Siliverin™, 90 VegCaps
Solaray, Siliverin™, 90 VegCaps
Solaray
140 mg3020.690.493View on iHerb →
14
Vitanica, CandidaStat, Yeast Balance Support, 60 Vegan Caps
Vitanica, CandidaStat, Yeast Balance Support, 60 Vegan Caps
Vitanica
140 mg3020.950.499View on iHerb →
15
Hydralyte, HydraLyte Plus® +Liver Support, Blood Orange Ginger, 20 Packets, 0.32 oz (9.2 g) Each
Hydralyte, HydraLyte Plus® +Liver Support, Blood Orange Ginger, 20 Packets, 0.32 oz (9.2 g) Each
Hydralyte
250 mg2034.990.700View on iHerb →
16
Revive, Gut Health+, 60 Vegetarian Capsules
Revive, Gut Health+, 60 Vegetarian Capsules
Revive
100 mg3024.990.833View on iHerb →
17
Natural Balance, Metal Clenz, 60 VegCaps
Natural Balance, Metal Clenz, 60 VegCaps
Natural Balance
100 mg3025.890.863View on iHerb →
18
California Gold Nutrition, Sugar Balance Complex with Chromium, Gymnema Sylvestre, Gingko Biloba and Milk Thistle, 120 Capsules
California Gold Nutrition, Sugar Balance Complex with Chromium, Gymnema Sylvestre, Gingko Biloba and Milk Thistle, 120 Capsules
California Gold Nutrition
50 mg4019.040.952View on iHerb →
19
Pink Stork, Postpartum Mood Support, 60 Capsules
Pink Stork, Postpartum Mood Support, 60 Capsules
Pink Stork
100 mg3039.001.30View on iHerb →
20
Nutra BioGenesis, BioLiv, 90 Capsules
Nutra BioGenesis, BioLiv, 90 Capsules
Nutra BioGenesis
50 mg3027.991.87View on iHerb →
21
LifeSeasons, Therapeutics, Beau-T®, Hair, Skin & Nails, 180 Veg Capsules
LifeSeasons, Therapeutics, Beau-T®, Hair, Skin & Nails, 180 Veg Capsules
LifeSeasons
50 mg6064.992.17View on iHerb →
22
ONE OF ONE, Greens + Gut Health, Mixed Berry , 12.7 oz (360 g)
ONE OF ONE, Greens + Gut Health, Mixed Berry , 12.7 oz (360 g)
ONE OF ONE
50 mg3044.993.00View on iHerb →
23
ONE OF ONE, Greens + Gut Health, Pineapple, 12.7 oz (360 g)
ONE OF ONE, Greens + Gut Health, Pineapple, 12.7 oz (360 g)
ONE OF ONE
50 mg3044.993.00View on iHerb →
24
ONE OF ONE, Greens + Gut Health, Lemon Iced Tea, 12.7 oz (360 g)
ONE OF ONE, Greens + Gut Health, Lemon Iced Tea, 12.7 oz (360 g)
ONE OF ONE
50 mg3044.993.00View on iHerb →
25
Revive, Liver, 120 Vegetarian Capsules
Revive, Liver, 120 Vegetarian Capsules
Revive
1 g3054.99183.30View on iHerb →

How we rank Milk Thistle Seed Extract (Silybum marianum) Standardized to 80% Silymarin

Two supplements can list the same dose per serving yet cost very differently once you account for how many servings are in the bottle. We calculate the total nutrient in each container (dose per serving × servings per container), divide the current price by that total, and rank by the resulting cost per unit. Lower is better. Because prices are refreshed automatically, this ranking reflects today's iHerb pricing rather than a snapshot from months ago.

Cost per unit is a starting point, not the whole story — the ideal form, third-party testing, and other ingredients matter too. Always check the label and consult a healthcare professional before starting a supplement.

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Prices update automatically and may differ from iHerb at checkout. Rankings are based on cost per unit of the listed nutrient and are for informational purposes only — not medical advice. Links to iHerb are affiliate links.