PlainVitamins

8-Hour Alert

by MHP Maximum Human Performance · tablet or pill · 30 bilayer tablets

  • On the market (NIH)
  • UPC 6 66222 09162 4
  • DSLD label 19370
  • Serving 1 tablet
  • 30 servings

8-Hour Alert by MHP Maximum Human Performance lists 4 ingredients, 4 with an amount per serving of 1 tablet, such as 30 mg of niacin, 40 mg of vitamin B6, 400 mcg of folic acid and 500 mcg of vitamin B12. Its current label entered the NIH Dietary Supplement Label Database on March 25, 2013.

What is in 8-Hour Alert?

Each row as the label prints it, per serving of 1 tablet. The capsule beside an amount places it among every product in the NIH database that lists the same ingredient: the bar is the middle half of their amounts, the line in it the median, the whiskers the 10th and 90th percentiles; the green tick is the FDA Daily Value and the red dashed tick the adult upper limit (IOM).

8-Hour Alert: Supplement Facts rows against the market (DSLD label 19370, January 2026 release)
IngredientAmount% DVAmong products listing it
Niacinas NiacinamideNiacin (Form: as Niacinamide)30 mg150%Niacin in 8-Hour Alert against 12,413 products30 mg per serving; the middle half of products list 13.2 mg to 48 mg, the median 20 mg.DV 16 mgUL 35 mg30 mg

Higher than 63% of 12,413 products listing niacin (median 20 mg).

Vitamin B6as Pyridoxine HydrochlorideVitamin B6 (Form: as Pyridoxine Hydrochloride)40 mg2,000%Vitamin B6 in 8-Hour Alert against 15,277 products40 mg per serving; the middle half of products list 2 mg to 20 mg, the median 6 mg.DV 1.7 mgUL 100 mg40 mg

Higher than 85% of 15,277 products listing vitamin B6 (median 6 mg).

Folic Acid400 mcg100%Folate in 8-Hour Alert against 7,022 products400 mcg per serving; the middle half of products list 200 mcg to 400 mcg, the median 400 mcg.400 mcg

24% of 7,022 products listing folate give more (median 400 mcg).

Vitamin B12as CyanocobalaminVitamin B12 (Form: as Cyanocobalamin)500 mcg8,333%Vitamin B12 in 8-Hour Alert against 14,425 products500 mcg per serving; the middle half of products list 6 mcg to 200 mcg, the median 36 mcg.DV 2.4 mcg500 mcg

Higher than 82% of 14,425 products listing vitamin B12 (median 36 mcg).

Concentrated Energizing Blend:as Caffeine, Glucuronolactone, L-Phenylalanine655 mg

Source: NIH ODS Dietary Supplement Label Database, label 19370 (entered March 25, 2013), version 9.4.0. See the label on DSLD. Amounts are what the maker printed; DSLD does not test products. Daily Values: the FDA's Daily Value page.

Is that a lot?

Every amount on this label with a position sits within the middle 80% of the products that list the same ingredient.

The NIH database records one serving a day from the label's directions; its % Daily Values are for adults and children 4 or more years of age. The directions as printed are further down this page.

The Tolerable Upper Intake Level is the most of a nutrient per day, from food, water and supplements together, that is likely to pose no risk for almost all adults (Institute of Medicine, 2011). It does not apply under medical supervision. This page compares labels; it is not medical advice.

Sources: amounts from the DSLD label; Daily Values from 21 CFR 101.9(c)(8)(iv); adult upper limits from the Institute of Medicine's DRI summary tables (2011). How positions are computed.

Which products have the closest formulas?

3 products list the very same ingredients; the nearest amounts come first.

Source: ingredient lists of every product's current label in DSLD (version 9.4.0); similarity weights each shared ingredient by how rare it is.

What does the label say about taking it?

Quoted from the label as DSLD transcribed it: the maker's words, including any claim about what the product does, which the FDA has not evaluated and PlainVitamins does not endorse.

Directions
Directions: Take one Bi-Layer Tablet daily either in the morning or early afternoon for enhanced energy and alertness. Do not take before bedtime.*
Warnings
CAUTION: Contains caffeine comparable to a 12 oz. cup of the leading premium coffee. Caffeine intake is not advisable in cases of high blood pressure, pregnancy or nursing. Limit the use of caffeine-containing medications, foods or beverages while taking this product because too much caffeine may cause nervousness, irritability, sleeplessness and, occasionally, rapid heartbeat. Do not exceed recommended dose.
- Keep out of reach of children.
- Do not purchase if seal is broken.
Storage
- Store at 15(0)-30(0)C (59(0)-86(0)F). - Protect from heat, light and moisture.

Source: label statements in DSLD label 19370.

What else is on the label?

Other ingredients: Dicalcium Phosphate, Microcrystalline Cellulose, Stearic Acid, Hypromellose, Coating, Croscarmellose Sodium, Magnesium Stearate, Silica, Yellow 5 Lake.

How many labels does 8-Hour Alert have?

2 labels are on file under this name since March 25, 2013: other sizes, label designs and reformulations. The current one leads this page.

  1. Label 19370 (current) Entered March 25, 2013 · on the market · 30 bilayer tablets · UPC 6 66222 09162 4
  2. Label 19364 Entered March 25, 2013 · on the market · 14 bilayer tablets · UPC 6 66222 09134 1

Source: DSLD label entry and market events, version 9.4.0 (labels entered through September 25, 2025).

Who makes it?

The label names Maximum Human Performance, LLC (distributor), Fairfield, NJ. All MHP Maximum Human Performance products.

Where next?