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real energy for days and nights.

shop the bar
peanut butter
dark chocolate
best seller
quantum peanut butter dark chocolate
★★★★★ (128)
pb dark chocolate$19.95
100mg caffeine, 10g plant protein, 8-pack
dark chocolate
himalayan salt
quantum dark chocolate himalayan salt
★★★★★ (94)
dark choc salt$19.95
100mg caffeine, 10g plant protein, 8-pack
salted peanut
butter crunch
quantum salted peanut butter crunch
★★★★★ (87)
salted pb crunch$19.95
100mg caffeine, 10g plant protein, 8-pack

built for summer. and the 2pm slump.

a drink melts, spills and never makes it through security. a bar wins everywhere: the beach bag, the gym bag, the glovebox.

find your moment
caramel almond
sea salt
quantum caramel almond sea salt
★★★★★ (76)
caramel almond$19.95
100mg caffeine, 10g plant protein, 8-pack
the variety
pack
all six flavors
quantum variety pack
★★★★★ (211)
variety 12-pack$27.95
all six flavors in one box
chocolate fix
+ sweet salty
12-pack
quantum chocolate fix and sweet salty packs
★★★★★ (63)
curated packs$27.95
three flavors each, four of each bar
on the trail
real food inside

the one ingredient you can feel

the functional aisle is full of ingredients you have to take on faith. fiber, adaptogens, nootropics: good for you, invisible to you. caffeine is the one functional ingredient with a felt, immediate, consistent effect. quantum is built around it.

how it works

sustained energy by design

100mg clean caffeine from organic green coffee, paired with 10g plant protein and real-food macronutrients that slow how the caffeine is absorbed. the energy releases slowly. no spike, no crash.

the science