Check a label

VMI Sports · Pre-workout

Is VMI Sports K-XR underdosed?

1 scoop = 8.5 g30 scoopsLabel as of 19 Nov 2021 · NIH DSLD
Verdict

Too much caffeine; effective dose on 1 of 2 key ingredients.

One serving reaches the 400 mg daily caffeine reference on its own.

Effective dose
2
Below research dose
0
Hidden in a blend
0
Too much
1

Ingredient by ingredient

Per scoop · bodyweight 75 kg (default)
  • Niacin (Vitamin B3)Per scoop 35 mgStudies Not setNot gradedNot 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 35 mcgStudies Not setNot gradedNot 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.

  • CholineLabel: Choline (Choline)Per scoop 200 mgStudies Not setNot gradedNot graded

    Contains 200 mg. Not graded: most people get enough choline from food, and a review of the exercise studies found supplements might only help endurance when very long, hard exercise lowers blood choline (Penry and Manore, 2008).

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

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

  • TaurinePer scoop 1.5 gStudies 1–6 gEffective doseModerate

    Contains 1.5 g; studies use 1–6 g.

  • TheobrominePer scoop 300 mgStudies Not setNot gradedNot graded

    Contains 300 mg. Not graded: there is no peer-reviewed exercise trial, and 100–400 mg did not change mood or alertness in human studies.

  • elevATP (Ancient Peat, Apple Extract)Per scoop 150 mgStudies Not setNot gradedNot graded

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

  • CaffeineLabel: Caffeine Citrate; Caffeine Anhydrous; Infinergy Dicaffeine MalatePer scoop 400 mgStudies 3–6 mg/kgToo muchStrong

    Contains 400 mg in one serving, at or above the 400 mg daily reference.

  • Rauwolfia vomitoria root extractPer scoop 2 mgStudies Not setNot gradedNot graded

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

  • VitaCholinePer scoop 500 mgStudies Not setNot gradedNot graded

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

  • DMAE BitartratePer scoop 300 mgStudies Not setNot gradedNot graded

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

  • Huperzia serrata Club Moss extractPer scoop 3 mgStudies Not setNot gradedNot 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.

Caffeine Blend
Proprietary blend · 3 ingredients · amounts not disclosed
586 mg total

US labels must list blend ingredients heaviest first (21 CFR 101.36). So the 1st is at least 1/3 of the blend, the 2nd can be at most half, the 3rd at most a third.

    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. Caffeine, 3–6 mg/kg: Guest et al., 2021.
    3. Taurine, 1–6 g: Deng et al., 2025Waldron et al., 2018.
    4. Daily caffeine reference, 400 mg: US FDA, Spilling the Beans.
    5. Blend order rule: 21 CFR 101.36.
    6. Label data: National Institutes of Health, Office of Dietary Supplements. Dietary Supplement Label Database, 2026. https://dsld.od.nih.gov/. Label 257532.

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