How much caffeine is in Goody's Mental Alert Powder?

One powder pack of Goody's Mental Alert Powder contains 150 mg of caffeine.

That's about one and a half cups of brewed coffee, and 38% of the 400 mg a day the FDA cites for most healthy adults.

Source: DailyMed (U.S. National Library of Medicine) · checked 10 Nov 2026

When did you take it?

Taken at 3 pm, about 52 mg is still in you at an 11 pm bedtime. That might affect your sleep.

Bedtime

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Latest time to take it

For an 11 pm bedtime, one powder pack of Goody's Mental Alert Powder taken by about 2:40 pm keeps most people under 50 mg of caffeine through the night. The table works it out for other bedtimes and for how sensitive you are: it is the latest time to take one so that the caffeine left stays under the line all night.

Bedtime	Very sensitive under 25 mg	Average under 50 mg	Not very sensitive under 100 mg
9 pm	7:40 am	12:40 pm	5:40 pm
10 pm	8:40 am	1:40 pm	6:40 pm
11 pm	9:40 am	2:40 pm	7:40 pm
Midnight	10:40 am	3:40 pm	8:40 pm
1 am	11:40 am	4:40 pm	9:40 pm

One unit as listed on the label, average clearance (half-life 5 h), 8 hours of sleep. "Any time" means even one at bedtime stays under the line. Follow the label or ask your pharmacist about how much and how often to take it; this table is only about sleep.

How long it lasts

The caffeine from one powder pack of Goody's Mental Alert Powder peaks in your blood about 70 minutes after you take it, at roughly 128 mg. Half of it is gone in about 5 hours for an average adult; that ranges from roughly 3 to 7 hours, and longer in pregnancy or with some medicines.

Time after	3 hours	6 hours	9 hours	12 hours
Still in you	104 mg	69 mg	45 mg	30 mg

So one taken at 3 pm leaves about 52 mg at 11 pm. How long caffeine lasts explains the curve.

How it compares

Goody's Mental Alert Powder is stronger than 42% of the 34 supplements and medicines we track, by caffeine per serving.

To reach 400 mg in a day you would need about 2½ of these.

Less caffeine

G FUEL Energy Formula 140 mg, 1 scoop
Amino Energy 100 mg, 1 serving
Ergotamine and Caffeine (Cafergot) 100 mg, 1 tablet

More caffeine

Gold Standard Pre-Workout 175 mg, 1 scoop
Mr. Hyde Pre-Workout 190 mg, 1 scoop, Infinite
1st Phorm Project-1 Pre-Workout 200 mg, 1 serving

Same caffeine: C4 Ripped, Goody's Hangover Powder, Momentous Pre-Workout.

FAQ

Is Goody's Mental Alert Powder high in caffeine?

Yes. One powder pack of Goody's Mental Alert Powder contains 150 mg, which is 1.6 times an 8 fl oz cup of brewed coffee (95 mg).

Can I take Goody's Mental Alert Powder at night?

Not if you want to sleep well. Taken at 7 pm, it leaves about 91 mg in an average adult at an 11 pm bedtime, above the 50 mg most people sleep fine with. The latest time for an 11 pm bedtime is about 2:40 pm.

How long does the caffeine in Goody's Mental Alert Powder last?

It peaks about 70 minutes after you take it. Of the 150 mg, about 69 mg is still in you 6 hours later and 30 mg after 12 hours, for an average adult with a 5-hour half-life.

Does Goody's Mental Alert Powder have more caffeine than a cup of coffee?

Yes. One powder pack of Goody's Mental Alert Powder contains 150 mg; an 8 fl oz cup of coffee has 95 mg.

Method and limits

The caffeine figure comes from DailyMed (U.S. National Library of Medicine); it is the amount the label lists per unit. The curves use a standard one-compartment model with an average 5-hour half-life and a sleep-friendly line of 50 mg; your own body may clear caffeine faster or slower. How it works has the details.

These are estimates for information, not medical advice. This is a medicine: follow the label and ask your pharmacist or doctor about dosing.

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