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Cheapest KSM-66 Ashwagandha extract on iHerb

Ranked by real cost per 100 mg of KSM-66 Ashwagandha extract — cheapest value first.

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

The priciest option here costs about 4.5× more per 100 mg of KSM-66 Ashwagandha extract 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, KSM-66 Ashwagandha Plus L-Theanine, 60 Coated Caplets
Nature's Truth, KSM-66 Ashwagandha Plus L-Theanine, 60 Coated Caplets
Nature's Truth
600 mg3016.100.089View on iHerb →
2
Kyolic, Specialty Series, Calm Mood, 120 Vegan Capsules
Kyolic, Specialty Series, Calm Mood, 120 Vegan Capsules
Kyolic
300 mg12039.820.111View on iHerb →
3
Kyolic, Specialty Series, Calm Mood, 60 Vegan Capsules
Kyolic, Specialty Series, Calm Mood, 60 Vegan Capsules
Kyolic
300 mg6022.840.127View on iHerb →
4
Divine Health, Don Colbert M.D. Sleep-Ease, Natural Mixed Berry, 5.29 oz (150 g)
Divine Health, Don Colbert M.D. Sleep-Ease, Natural Mixed Berry, 5.29 oz (150 g)
Divine Health
600 mg3025.190.140View on iHerb →
5
Irwin Naturals, Daily-Multi Testosterone Up ® Booster For Men, 60 Liquid Soft-Gels
Irwin Naturals, Daily-Multi Testosterone Up ® Booster For Men, 60 Liquid Soft-Gels
Irwin Naturals
675 mg3029.990.148View on iHerb →
6
OLLY, Lovin' Libido, 40 Capsules
OLLY, Lovin' Libido, 40 Capsules
OLLY
600 mg2019.990.167View on iHerb →
7
Irwin Naturals, Steel-Libido® Peak Testosterone®, 75 Liquid Soft-Gels
Irwin Naturals, Steel-Libido® Peak Testosterone®, 75 Liquid Soft-Gels
Irwin Naturals
675 mg1824.990.206View on iHerb →
8
Universal U, Ashwagandha, Mixed Berry, 60 Chews
Universal U, Ashwagandha, Mixed Berry, 60 Chews
Universal U
300 mg3023.500.261View on iHerb →
9
Universal U, Ashwagandha, Lemon Burst, 60 Chews
Universal U, Ashwagandha, Lemon Burst, 60 Chews
Universal U
300 mg3023.500.261View on iHerb →
10
Irwin Naturals, Ashwagandha, 60 Liquid Soft-Gels
Irwin Naturals, Ashwagandha, 60 Liquid Soft-Gels
Irwin Naturals
300 mg3023.990.267View on iHerb →
11
Irwin Naturals, Mental Clarity Information Retention™, 60 Liquid Soft-Gels
Irwin Naturals, Mental Clarity Information Retention™, 60 Liquid Soft-Gels
Irwin Naturals
300 mg3024.990.278View on iHerb →
12
Ghost, Burn, Kiwi Strawberry, 10.6 oz (300 g)
Ghost, Burn, Kiwi Strawberry, 10.6 oz (300 g)
Ghost
300 mg6049.990.278View on iHerb →
13
Ghost, Burn, Guava Berry , 10.6 oz (300 g)
Ghost, Burn, Guava Berry , 10.6 oz (300 g)
Ghost
300 mg6049.990.278View on iHerb →
14
Nature's Bounty, Ashwagandha, Mixed Berry, 60 Gummies (150 mg per Gummy)
Nature's Bounty, Ashwagandha, Mixed Berry, 60 Gummies (150 mg per Gummy)
Nature's Bounty
300 mg3025.220.280View on iHerb →
15
Irwin Naturals, Ashwagandha Mind & Body, Berry-Citrus, 10 Liquid-Tubes, 3.38 fl oz (100 ml)
Irwin Naturals, Ashwagandha Mind & Body, Berry-Citrus, 10 Liquid-Tubes, 3.38 fl oz (100 ml)
Irwin Naturals
675 mg1019.990.296View on iHerb →
16
Irwin Naturals, Sensual Women™, Endurance, Stress, Libido, 60 Liquid Soft-Gels
Irwin Naturals, Sensual Women™, Endurance, Stress, Libido, 60 Liquid Soft-Gels
Irwin Naturals
300 mg3027.990.311View on iHerb →
17
Force Factor, Test X180® Supreme, 45 Tablets
Force Factor, Test X180® Supreme, 45 Tablets
Force Factor
600 mg1527.990.311View on iHerb →
18
Irwin Naturals, Female Balance, KSM-66® Ashwagandha + Evening Primrose, 60 Liquid Soft-Gels
Irwin Naturals, Female Balance, KSM-66® Ashwagandha + Evening Primrose, 60 Liquid Soft-Gels
Irwin Naturals
300 mg3029.990.333View on iHerb →
19
Ghost, Intra, Blue Raspberry, 15.5 oz (440 g)
Ghost, Intra, Blue Raspberry, 15.5 oz (440 g)
Ghost
600 mg2039.990.333View on iHerb →
20
Ghost, Intra, Orange Squeeze, 15.2 oz (430 g)
Ghost, Intra, Orange Squeeze, 15.2 oz (430 g)
Ghost
600 mg2039.990.333View on iHerb →
21
Ghost, Intra, Welch's® Grape, 16.2 oz (460 g)
Ghost, Intra, Welch's® Grape, 16.2 oz (460 g)
Ghost
600 mg2039.990.333View on iHerb →
22
Irwin Naturals, Testosterone UP® Men Over 40, 60 Liquid Soft-Gels
Irwin Naturals, Testosterone UP® Men Over 40, 60 Liquid Soft-Gels
Irwin Naturals
338 mg3035.000.346View on iHerb →
23
Irwin Naturals, Testosterone UP for Men 60+, 60 Liquid Softgels
Irwin Naturals, Testosterone UP for Men 60+, 60 Liquid Softgels
Irwin Naturals
300 mg3034.990.389View on iHerb →
24
Irwin Naturals, Testosterone UP Prostate Defense™, Dual-Action, 60 Liquid Soft-Gels
Irwin Naturals, Testosterone UP Prostate Defense™, Dual-Action, 60 Liquid Soft-Gels
Irwin Naturals
338 mg3039.990.395View on iHerb →
25
Nordic Naturals, Menopause Support , 60 Capsules
Nordic Naturals, Menopause Support , 60 Capsules
Nordic Naturals
275 mg3033.110.401View on iHerb →

How we rank KSM-66 Ashwagandha extract

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.