Is Thorne Advanced Pre-Workout underdosed?

• Vitamin B6 (as Pyridoxal 5'-Phosphate)Per scoop 3 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.

• Vitamin B12 (as Methylcobalamin)Per scoop 50 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.

• SodiumPer scoop 8 mgStudies Not setNot gradedEvidence: Not graded

  Contains 15 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).

• L-CitrullinePer scoop 2.5 gStudies 4–5.33 gEffective doseEvidence: Weak

  Contains 5 g; studies use 4–5.33 g.

• Beta-AlaninePer scoop 1.6 gStudies 3.2–6.4 g/dayEffective doseEvidence: Strong

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

• Alpha-GPCLabel: Alpha GPC (L-alpha-Glycerylphosphorylcholine)Per scoop 300 mgStudies 250–600 mg/dayEffective doseEvidence: Weak

  Contains 600 mg; studies use 250–600 mg/day.

• CaffeineLabel: Caffeine (from Coffee Bean)Per scoop 100 mgStudies 3–6 mg/kgBelow research doseEvidence: Strong

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

• L-TheaninePer scoop 100 mgStudies 100–200 mgEffective doseEvidence: Weak

  Contains 200 mg; studies use 100–200 mg.

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. Beta-Alanine, 3.2–6.4 g/day: Harris et al., 2006Hobson et al., 2012Trexler et al., 2015.
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. L-Theanine, 100–200 mg: Owen et al., 2008Payne et al., 2025.
6. Daily caffeine reference, 400 mg: US FDA, Spilling the Beans.

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