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Cheapest Caffeine (Tea Leaf & Green Coffee) on iHerb

Ranked by real cost per 10 mg of Caffeine (Tea Leaf & Green Coffee) — cheapest value first.

Prices updated Jul 25, 2026 · 8 products · Prices in USD

The priciest option here costs about 1.9× more per 10 mg of Caffeine (Tea Leaf & Green Coffee) than the best-value pick Rule One Proteins. For the same daily dose, choosing by cost per unit instead of sticker price can meaningfully cut your yearly spend.
#ProductDoseServingsPrice (USD)Cost per 10 mg
1
Rule One Proteins, Energized Amino, Peach Mango, 9.52 oz (270 g)
Rule One Proteins, Energized Amino, Peach Mango, 9.52 oz (270 g)
Rule One Proteins
120 mg309.750.027View on iHerb →
2
Rule One Proteins, Energized Amino, Sour Candy, 9.52 oz (270 g)
Rule One Proteins, Energized Amino, Sour Candy, 9.52 oz (270 g)
Rule One Proteins
120 mg309.770.027View on iHerb →
3
Rule One Proteins, Energized Amino, Blue Raspberry, 9.52 oz (270 g)
Rule One Proteins, Energized Amino, Blue Raspberry, 9.52 oz (270 g)
Rule One Proteins
120 mg3018.070.050View on iHerb →
4
Rule One Proteins, Energized Amino, Watermelon, 9.52 oz (270 g)
Rule One Proteins, Energized Amino, Watermelon, 9.52 oz (270 g)
Rule One Proteins
120 mg3018.070.050View on iHerb →
5
Rule One Proteins, Energized Amino, Orange Clementine, 9.52 oz (270 g)
Rule One Proteins, Energized Amino, Orange Clementine, 9.52 oz (270 g)
Rule One Proteins
120 mg3018.070.050View on iHerb →
6
Rule One Proteins, Energized Amino, Pineapple Passion Fruit, 9.52 oz (270 g)
Rule One Proteins, Energized Amino, Pineapple Passion Fruit, 9.52 oz (270 g)
Rule One Proteins
120 mg3018.070.050View on iHerb →
7
Rule One Proteins, Energized Amino, Fruit Punch, 9.52 oz (270 g)
Rule One Proteins, Energized Amino, Fruit Punch, 9.52 oz (270 g)
Rule One Proteins
120 mg3018.070.050View on iHerb →
8
Rule One Proteins, Energized Amino, Grape, 9.52 oz (270 g)
Rule One Proteins, Energized Amino, Grape, 9.52 oz (270 g)
Rule One Proteins
120 mg3018.070.050View on iHerb →

How we rank Caffeine (Tea Leaf & Green Coffee)

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.