Is MusclePharm Assault underdosed?

• Vitamin CLabel: Vitamin C (Ascorbic Acid)Per scoop 300 mgStudies Not setNot gradedEvidence: Not graded

  Contains 300 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.

• Vitamin E (DL-Alpha-Tocopheryl Acetate)Per scoop 18 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 B6 (Pyridoxine Hydrochloride)Per scoop 20 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 (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.

• Calcium (Calcium Silicate)Per scoop 30 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.

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

  Contains 1.6 g; studies use 3.2–6.4 g/day. Beta-Alanine works through daily use over weeks; a lower amount still builds up, just more slowly.

• Creatine MonohydratePer scoop 1.5 gStudies 3–5 g/dayBelow research doseEvidence: Strong

  Contains 1.5 g; studies use 3–5 g/day. Creatine Monohydrate works through daily use over weeks; a lower amount still builds up, just more slowly.

• Betaine AnhydrousPer scoop 500 mgStudies 2.5 g/dayBelow research doseEvidence: Moderate

  Contains 500 mg; studies use 2.5 g/day. Betaine Anhydrous works through daily use over weeks; a lower amount still builds up, just more slowly.

• TaurinePer scoop 500 mgStudies 1–6 gBelow research doseEvidence: Moderate

  Contains 500 mg; studies use 1–6 g.

• L-GlycinePer scoop 500 mgStudies Not setNot gradedEvidence: Not graded

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

• CaffeineLabel: Caffeine AnhydrousPer 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.

• Acetyl-L-Carnitine HydrochloridePer scoop 150 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. 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. Creatine Monohydrate, 3–5 g/day: Kreider et al., 2017.
5. Taurine, 1–6 g: Deng et al., 2025Waldron et al., 2018.
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.
8. Label data: National Institutes of Health, Office of Dietary Supplements. Dietary Supplement Label Database, 2026. https://dsld.od.nih.gov/. Label 305911.

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