Prime Energy vs Red Bull vs Monster: which has more caffeine?

Prime Energy has the most caffeine of the three: 200mg per 12 oz can, against 160mg per 16 oz can for Monster and 80mg per 8.4 oz can for Red Bull. It also leads per ounce, at roughly 16.7mg to 9.5mg, so the order holds whichever way you count.

Prime Energy vs Red Bull vs Monster: the numbers

Sources: Prime Energy is 200mg per 12 oz can per Caffeine Informer (source), and the figure is carried in our Prime Energy guide; Red Bull is 80mg per 8.4 oz can per Caffeine Informer (source), and the figure is carried in our Red Bull guide; Monster is 160mg per 16 oz can per Caffeine Informer (source), and the figure is carried in our Monster guide.

Per can or per ounce: pick the number that matches how you drink

The serving sizes here are different, so the two rankings answer different questions. Per serving tells you what one purchase delivers. Per fluid ounce tells you how concentrated each sip is, which is what matters if you nurse a large one slowly or split a can. Prime Energy is the densest of the three at about 16.7mg per ounce; Red Bull is the lightest at 9.5mg.

The three head-to-head pages

Each pairing has its own page with the full math:

• Prime Energy vs Red Bull, head to head
• Prime Energy vs Monster, head to head
• Red Bull vs Monster, head to head

Which one should you pick?

Take Red Bull when you want the smallest dose of the three, Monster when you want a middle number without thinking about it, and Prime Energy when you actually want the 200mg and know how you handle it. If you drink more than one caffeinated thing a day, the useful move is adding the day up against the 400mg reference rather than judging each drink alone.

For context, the FDA cites 400mg of caffeine a day as an amount generally not associated with negative effects in healthy adults. Tolerance and health vary, so treat these numbers as information, not advice.

Related reading

• The verified caffeine database
• Every drink compared: the comparisons index
• Compare any two of 120+ drinks

FAQ

Which has the most caffeine, Prime Energy, Red Bull or Monster? Prime Energy, at 200mg per 12 oz can. Monster has 160mg per 16 oz can and Red Bull has 80mg per 8.4 oz can.

Which of the three is strongest per ounce? Prime Energy, at about 16.7mg per fluid ounce, ahead of Monster at 10mg and Red Bull at 9.5mg.

How many Prime Energy servings reach the FDA 400mg reference? About 2.0 of them, at 12 oz can each. The FDA cites 400mg a day as an amount generally not associated with negative effects in healthy adults. This is information, not advice.