Energy Drink Reviews

Quite Possibly the Most Powerful Energy Drink Ever

Energy drink cans

The strongest, most powerful energy drink is Redline Xtreme (part of the Redline brand from Bang Energy).

This is selected from our database of over 1,000 caffeinated items.

With a can size of just 8 fl oz (240 ml), the drink has a massive 316 mg of caffeine. On a caffeine per ounce scale — it is the most powerful.

Recommendations are to consume only half a can at one time.

This RTD (Ready to Drink) workout supplement is aimed at bodybuilders and hardcore gym-goers.

Most Powerful Energy Drinks

Redline Xtreme continues to be the most concentrated caffeine supplement available.

Redline Xtreme Energy Drink
316 mg
per 8 fl oz
This item contains extreme levels of caffeine

Here are the top 5 most caffeinated energy drinks – as extracted from our database. Note they are ordered by the concentration of caffeine (not just the total amount).

Most Powerful Energy Shots

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Drink Featured: Redline Xtreme

Redline evolved from the concentrated VPX Redline Fat Burner (this was discontinued many years ago).

The parent company Vital Pharmaceuticals markets a number of brands: Bang Energy, Redline,  and the VPX workout supplement brand.

In 2021 the Redline brand had the following primary products:

Note that the standard Redline RTD  is no longer available. See reviews and taste of the drinks here.

Other Ingredients

So what’s in this super-powered bottle of energy?

Caffeine,  Yerba Mate, 5-HTP (5 hydroxy-1-tryptophan), Yohimbe, Evodiamine, and Vinpocetine. And a few other things (specifically electrolytes).

Yohimbe is a bark extract from a tree in Africa. It’s considered a natural aphrodisiac and sold here to treat impotency, dilate pupils, and stimulate fat loss. It can also mess with your blood pressure, so watch out.

Evodiamine is derived from a Chinese fruit called Evodia Rutaecarpa. Supposedly burns fat.

Vinpocetine is an alkaloid derived from a periwinkle plant. It is used in Europe, Japan, and Mexico to treat cerebrovascular and cognitive disorders. Some people claim it elevates metabolism, but with no proof.

And the interesting one in the group: 5-HTP. I made sure to spell it out, so the smart ones in the group have already figured out the key: Tryptophan. It’s the same stuff in turkey that makes you sleepy, and there’s scientific evidence of it.

The 5-HTP compound is sometimes used to treat mild depression as, somehow, it can increase serotonin levels. It can also affect appetite, which may be part of why they put it in here. The other part? When you’re jacking up a drink with this much caffeine, you’re going to get jitters and “scatterbrain.” This may actually cut the disconnected thoughts out and allow you to think normally, but still, give you the energy effects of caffeine.


Most of these highly caffeinated energy drinks and shots are designed to be used by people that have built up a tolerance to caffeine. They are to be used as a workout performance aid.

It is very easy to overdose on caffeine with these drinks. Be sure to check the symptoms of overdose.

They should not be consumed by the general public and definitely kept out of the reach of minors.

Always be aware of a drink’s ingredients and your own tolerance/sensitivity to caffeine before consuming any energy supplement you aren’t familiar with.

Drinks are reviewed by an independent drink reviewer and do not necessarily reflect the views or beliefs of this site.