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Cheapest Prebiotic on iHerb

Ranked by real cost per 100 mg of Prebiotic — cheapest value first.

Prices updated Jul 25, 2026 · 12 products · Prices in USD

The priciest option here costs about 1,018.7× more per 100 mg of Prebiotic than the best-value pick ALLMAX. 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
ALLMAX, FiberBiotiX, Orange, 7.3 oz (207 g)
ALLMAX, FiberBiotiX, Orange, 7.3 oz (207 g)
ALLMAX
500 mg309.800.065View on iHerb →
2
MRM Nutrition, Daily Probiotics, 5 Billion Cells, 30 Vegan Capsules
MRM Nutrition, Daily Probiotics, 5 Billion Cells, 30 Vegan Capsules
MRM Nutrition
500 mg3014.990.100View on iHerb →
3
ALLMAX, FiberBiotiX, Unflavored, 6.67 oz (189 g)
ALLMAX, FiberBiotiX, Unflavored, 6.67 oz (189 g)
ALLMAX
500 mg3017.010.113View on iHerb →
4
MRM Nutrition, Probiotics, 25 Billion Cells, 30 Vegan Capsules
MRM Nutrition, Probiotics, 25 Billion Cells, 30 Vegan Capsules
MRM Nutrition
100 mg3029.991.000View on iHerb →
5
Vital Nutrients, Hyperbiotics®, Pro-Kids® Probiotic, Tangy Orange, 60 Vegan Chewables
Vital Nutrients, Hyperbiotics®, Pro-Kids® Probiotic, Tangy Orange, 60 Vegan Chewables
Vital Nutrients
25 mg6025.991.73View on iHerb →
6
Vital Nutrients, Hyperbiotics®, Pro-15®, Pre + Probiotic, 60 Vegan Micro-Pearls
Vital Nutrients, Hyperbiotics®, Pro-15®, Pre + Probiotic, 60 Vegan Micro-Pearls
Vital Nutrients
25 mg6034.992.33View on iHerb →
7
Vital Nutrients, Hyperbiotics®, Pro-15®, Pre + Probiotic, 30 Vegan Micro-Pearls
Vital Nutrients, Hyperbiotics®, Pro-15®, Pre + Probiotic, 30 Vegan Micro-Pearls
Vital Nutrients
25 mg3019.992.67View on iHerb →
8
Vital Nutrients, Hyperbiotics®, Pro-Men® Probiotic, 60 Vegan Tablets
Vital Nutrients, Hyperbiotics®, Pro-Men® Probiotic, 60 Vegan Tablets
Vital Nutrients
25 mg6049.993.33View on iHerb →
9
Vital Nutrients, Hyperbiotics®, Pro-Women® Probiotic, 60 Vegan Tablets
Vital Nutrients, Hyperbiotics®, Pro-Women® Probiotic, 60 Vegan Tablets
Vital Nutrients
25 mg6049.993.33View on iHerb →
10
Vital Nutrients, Hyperbiotics®, Pro-Men® Probiotic, 30 Vegan Tablets
Vital Nutrients, Hyperbiotics®, Pro-Men® Probiotic, 30 Vegan Tablets
Vital Nutrients
25 mg3029.994.00View on iHerb →
11
Vital Nutrients, Hyperbiotics®, Pro-Women® Probiotic, 30 Vegan Tablets
Vital Nutrients, Hyperbiotics®, Pro-Women® Probiotic, 30 Vegan Tablets
Vital Nutrients
25 mg3029.994.00View on iHerb →
12
Kyolic, Kyo-Dophilus® Pro+ Synbiotic, Berry Smoothie, 50 Chewable Tablets
Kyolic, Kyo-Dophilus® Pro+ Synbiotic, Berry Smoothie, 50 Chewable Tablets
Kyolic
2 g2533.2666.52View on iHerb →

How we rank Prebiotic

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.