Is Jocko Fuel Go Pre-Workout underdosed?

• Vitamin CLabel: Vitamin C (Ascorbic Acid)Per scoop 500 mgStudies Not setNot gradedEvidence: Not graded

  Contains 500 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.

• Magnesium (Magnesium Oxide)Per scoop 100 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.

• Chloride (Potassium Chloride)Per scoop 100 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.

• SodiumLabel: Sodium (Sodium Bicarbonate)Per scoop 50 mgStudies Not setNot gradedEvidence: Not graded

  Contains 50 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).

• Potassium (Potassium Chloride)Per scoop 100 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.

• L-CitrullinePer scoop 500 mgStudies 4–5.33 gBelow research doseEvidence: Weak

  Contains 500 mg; studies use 4–5.33 g.

• 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.

• KSM-66 Ashwagandha root extract (Withanolides)Per scoop 250 mgStudies Not setNot gradedEvidence: Not graded

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

• Rhodiola rosea extract (Rosavins, Salidroside)Per scoop 100 mgStudies Not setNot gradedEvidence: Not graded

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

• TheobrominePer scoop 100 mgStudies Not setNot gradedEvidence: Not graded

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

• Alpha-GPCLabel: Alpha-GPC [50%]Per scoop 50 mgStudies 250–600 mg/dayBelow research doseEvidence: Weak

  Contains 50 mg; studies use 250–600 mg/day. Trials gave it daily, for weeks.

• CaffeineLabel: Caffeine (Coffea arabica, Green Coffee)Per scoop 95 mgStudies 3–6 mg/kgBelow research doseEvidence: Strong

  Contains 95 mg (1.3 mg/kg at 75 kg); studies use 3–6 mg/kg.

• L-TheaninePer scoop 95 mgStudies 100–200 mgBelow research doseEvidence: Weak

  Contains 95 mg; studies use 100–200 mg.

• Bacopa leaf extract (Bacosides) [20% Bacosides]Per scoop 50 mgStudies Not setNot gradedEvidence: Not graded

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

• White Tea leaf extract (Polyphenols)Per scoop 15 mgStudies Not setNot gradedEvidence: Not graded

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

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. Alpha-GPC, 250–600 mg/day: Bellar et al., 2015Marcus et al., 2017.
2. Caffeine, 3–6 mg/kg: Guest et al., 2021.
3. L-Citrulline, 4–5.33 g: Gough et al., 2021Vårvik et al., 2021.
4. L-Theanine, 100–200 mg: Owen et al., 2008Payne et al., 2025.
5. Vitamin C, 200–1000 mg/day: Frei et al., 2012Gonzalez et al., 2026Levine et al., 1996.
6. Daily caffeine reference, 400 mg: US FDA, Spilling the Beans.
7. Label data: National Institutes of Health, Office of Dietary Supplements. Dietary Supplement Label Database, 2026. https://dsld.od.nih.gov/. Label 272888.

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