Is Old School Labs Vintage Blast underdosed?

• Vitamin CLabel: Vitamin C (Ascorbic Acid)Per scoop 250 mgStudies Not setNot gradedEvidence: Not graded

  Contains 250 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.

• Niacin (Inositol Hexanicotinate)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.

• Vitamin B6 (Pyridoxine Hydrochloride)Per scoop 10 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.

• Pantothenic Acid (Calcium D-Pantothenate)Per scoop 10 mgStudies Not setNot gradedEvidence: Not graded

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

• Magnesium (Magnesium Oxide)Per scoop 50 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.

• Sodium (Sodium Chloride)Per scoop 50 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.

• Potassium (Potassium Citrate)Per scoop 99 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-CitrullineLabel: L-Citrulline MalatePer scoop 5000 mg, as printedStudies 4–5.33 gNot gradedEvidence: Weak

  Listed as “L-Citrulline Malate”, a form we have no conversion for, so it isn't graded.

• Beta-AlaninePer scoop 1 gStudies 3.2–6.4 g/dayBelow research doseEvidence: Strong

  Contains 1 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.

• L-Arginine Alpha-KetoglutaratePer scoop 1 gStudies Not setNot gradedEvidence: Not graded

  Not graded: the label gives it in a form or blend we can't turn into a dose (no stated ratio or amount), so it isn't counted. See the methodology.

• L-Carnitine L-TartrateLabel: L-Carnitine TartratePer scoop 250 mgStudies 3 g/dayBelow research doseEvidence: Weak

  Contains 250 mg; studies use 3 g/day. Trials gave it daily, for weeks.

• CaffeineLabel: Caffeine AnhydrousPer scoop 150 mgStudies 3–6 mg/kgBelow research doseEvidence: Strong

  Contains 150 mg (2 mg/kg at 75 kg); studies use 3–6 mg/kg.

• D-Aspartic AcidPer scoop 2 gStudies Not setNot gradedEvidence: Not graded

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

• N-Acetyl-L-TyrosinePer scoop 250 mgStudies Not setNot gradedEvidence: Not graded

  Contains 250 mg. Not graded: a form of L-tyrosine, which isn't graded either (see the L-tyrosine guide).

• Caffeine [microencapsulated]Per scoop 100 mgStudies Not setNot gradedEvidence: Not graded

  Not graded: the label gives it in a form or blend we can't turn into a dose (no stated ratio or amount), so it isn't counted. See the methodology.

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. Caffeine, 3–6 mg/kg: Guest et al., 2021.
3. L-Carnitine L-Tartrate, 3 g/day: Stefan et al., 2021Volek et al., 2002.
4. L-Citrulline, 4–5.33 g: Gough et al., 2021Vårvik et al., 2021.
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 206108.

Assumptions used on this page: The label doesn't say how many scoops make a serving, so one serving is counted as one scoop.

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