Is Jocko Fuel Pre-Workout underdosed?

• Vitamin CLabel: Vitamin C (as Ascorbic Acid)Per scoop 90 mgStudies Not setNot gradedEvidence: Not graded

  Contains 90 mg. A vitamin or mineral: we grade a pre-workout’s ingredients against exercise studies; vitamins and minerals are graded only on their own supplement pages.

  We're checking this amount against the label: the source prints it in an unusual unit.

• Vitamin B6 (as Pyridoxine Hydrochloride)Per scoop 2 mgStudies Not setNot gradedEvidence: Not graded

  Not graded: a vitamin or mineral. We grade a pre-workout’s ingredients against exercise studies; vitamins and minerals are graded only on their own supplement pages.

  We're checking this amount against the label: the source prints it in an unusual unit.

• Vitamin B12 (as Methylcobalamin)Per scoop 2 mcgStudies Not setNot gradedEvidence: Not graded

  Not graded: a vitamin or mineral. We grade a pre-workout’s ingredients against exercise studies; vitamins and minerals are graded only on their own supplement pages.

  We're checking this amount against the label: the source prints it in an unusual unit.

• MagnesiumLabel: Magnesium (as Magnesium Citrate)Per scoop 15 mgStudies Not setNot gradedEvidence: Not graded

  Contains 15 mg. A vitamin or mineral: we grade a pre-workout’s ingredients against exercise studies; vitamins and minerals are graded only on their own supplement pages.

  We're checking this amount against the label: the source prints it in an unusual unit.

• Chloride (as Sodium Chloride)Per scoop 70 mgStudies Not setNot gradedEvidence: Not graded

  Not graded: a vitamin or mineral. We grade a pre-workout’s ingredients against exercise studies; vitamins and minerals are graded only on their own supplement pages.

  We're checking this amount against the label: the source prints it in an unusual unit.

• SodiumLabel: Sodium (as Sodium Chloride & Sodium Gluconate)Per scoop 90 mgStudies Not setNot gradedEvidence: Not graded

  Contains 90 mg. Not graded: on its own the sodium in a serving says little, because what counts is the drink it makes. Electrolyte products are judged on the sodium per litre once mixed as the label directs (0.5–0.7 g per litre, AIS).

  We're checking this amount against the label: the source prints it in an unusual unit.

• Potassium (as Potassium Citrate)Per scoop 80 mgStudies Not setNot gradedEvidence: Not graded

  Not graded: a vitamin or mineral. We grade a pre-workout’s ingredients against exercise studies; vitamins and minerals are graded only on their own supplement pages.

  We're checking this amount against the label: the source prints it in an unusual unit.

• L-CitrullinePer scoop 6 gStudies 4–5.33 gEffective doseEvidence: Weak

  Contains 6 g; studies use 4–5.33 g.

  We're checking this amount against the label: the source prints it in an unusual unit.

• Beta-AlanineLabel: Beta AlaninePer scoop 3.2 gStudies 3.2–6.4 g/dayEffective doseEvidence: Strong

  Contains 3.2 g; studies use 3.2–6.4 g/day.

  We're checking this amount against the label: the source prints it in an unusual unit.

• Betaine AnhydrousPer scoop 2.5 gStudies 2.5 g/dayEffective doseEvidence: Moderate

  Contains 2.5 g; studies use 2.5 g/day.

  We're checking this amount against the label: the source prints it in an unusual unit.

• N-Acetyl L-Carnitine HydrochloridePer scoop 500 mgStudies Not setNot gradedEvidence: Not graded

  Not graded: we have no research dose for it from exercise studies.

  We're checking this amount against the label: the source prints it in an unusual unit.

• CaffeineLabel: Caffeine (Naturally Sourced from Coffee Bean)Per scoop 200 mgStudies 3–6 mg/kgBelow research doseEvidence: Strong

  Contains 200 mg (2.7 mg/kg at 75 kg); studies use 3–6 mg/kg.

  We're checking this amount against the label: the source prints it in an unusual unit.

• MethylliberineLabel: Methylliberine (as 40% Dynamine™ yielding 25 mg)Per scoop 25 mgStudies Not setNot gradedEvidence: Not graded

  Contains 25 mg. Not graded: no exercise trial has tested it on its own; 100 mg improved how energetic people said they felt, but not their scores on cognitive tests (La Monica et al., 2023).

  We're checking this amount against the label: the source prints it in an unusual unit.

• TheobrominePer scoop 50 mgStudies Not setNot gradedEvidence: Not graded

  Contains 50 mg. Not graded: there is no peer-reviewed exercise trial, and 100–400 mg did not change mood or alertness in human studies.

  We're checking this amount against the label: the source prints it in an unusual unit.

Use “Check it for your dose” to see this table for your own scoops and bodyweight. Only caffeine is dosed per kilogram in the studies we cite; the other research doses are fixed amounts, so your weight doesn't change them.

How many scoops would it take?

To reach the low end of the research dose for each underdosed ingredient.

Taking more doesn't fix this product. Reaching those doses means more than 400 mg of caffeine from the scoops alone, above the FDA's 400 mg daily reference for most adults, before any coffee.

Where the reference doses come from

1. Beta-Alanine, 3.2–6.4 g/day: Harris et al., 2006Hobson et al., 2012Trexler et al., 2015.
2. Betaine Anhydrous, 2.5 g/day: Cholewa et al., 2013Hoffman et al., 2009Zawieja et al., 2024.
3. Caffeine, 3–6 mg/kg: Guest et al., 2021.
4. L-Citrulline, 4–5.33 g: Gough et al., 2021Vårvik et al., 2021.
5. Magnesium, 300–350 mg/day: Zhang et al., 2016.
6. Vitamin C, 200–1000 mg/day: Frei et al., 2012Gonzalez et al., 2026Levine et al., 1996.
7. Daily caffeine reference, 400 mg: US FDA, Spilling the Beans.

Methodology 1.11. Read the full methodology or the corrections log.