Supplements

Caffeine Anhydrous

By Cameron McClevePublished Sep 27, 20262 min read

What is it?

Caffeine anhydrous is caffeine with the water removed for use in a measured powder or capsule. The caffeine itself acts the same way whether it comes from a supplement or coffee. The pictured pre-workout contains 200 mg per scoop. [1,3]

How does it work?

Caffeine blocks adenosine signaling in the brain. That usually makes you feel more alert and can make hard exercise feel more manageable. As a stimulant, its main role is alertness and exercise performance rather than the blood-flow pathway behind pump ingredients. [1]

Why is it in pre-workout?

Caffeine has substantial evidence for endurance performance, with benefits also seen in muscular endurance, strength, power, and sprinting in many studies. Effects vary by person and task, and more caffeine is not automatically better. [1]

For lifting, a review found that even about 1–2 mg/kg taken near an hour before exercise can improve resistance-exercise performance on average. That helps explain why a 200 mg scoop may be meaningful without pushing to very high doses. A separate recent analysis found small average improvements in bar speed and power during resistance exercise. These are workout outcomes, not proof of extra long-term muscle growth. [2,4]

PRACTICAL AMOUNT

How much?

2–3 mg/kg

FORM & SCHEDULE

What it refers to

caffeine about 45–60 minutes before training

This is a practical starting range, not a universal optimum. The FDA cites 400 mg/day as a level not generally linked to negative effects for most adults, but sensitivity varies. Avoid a dose or timing that disrupts sleep; seek individual advice for pregnancy, relevant conditions, or medicines.

2–3 mg/kg — caffeine, about 45–60 minutes before training

Read detailed dosing notes

For an 80 kg (176 lb) adult, that is about 160–240 mg; this product's 200 mg is about 2.5 mg/kg. This is a practical starting range within the evidence, not a universal optimum. Lower amounts may work, while the commonly studied 3–6 mg/kg range raises the chance of side effects for some people. [1,2]

Count coffee, energy drinks, and other supplements toward your day's total. The FDA cites 400 mg/day as a level not generally linked to negative effects for most adults, but sensitivity varies; caffeine can cause anxiety, palpitations, and sleep disruption. Avoid timing that harms your sleep, and seek individual guidance for pregnancy, relevant medical conditions, or interacting medicines. [3]

Sources & further reading