Legion Caffeine & Energy Range

Pre-Workout

Legion Pulse

• 8 g citrulline malate
• 3.6 g beta-alanine
• 350 mg caffeine
• 350 mg L-theanine
• 2.5 g betaine
• 300 mg alpha-GPC
• Every dose disclosed - no proprietary blend
• 4.6/5 from 22,589 reviews

One-time purchase $49.99 — $2.50 per dose
With a subscription $37.49 — $1.87 per dose

Prices verified 29 August 2026. The subscription price is a recurring Subscribe & Save rate, not a discount on a single order.

We rated Pulse fully dosed in our own dose comparison before any commercial relationship with Legion existed. The doses are the reason, not the commission.

Check price at Legion →

Code nunopa — BOGO 50% off your first order

Read the full Legion Pulse Stim-Free review →

Essential Amino Acids

Legion EAA

• Full essential amino acid profile
• Every dose disclosed

Check price at Legion →

Code nunopa — BOGO 50% off your first order

Legion Pulse Burn

Thermogenic Pre-Workout

• Pre-workout with a thermogenic profile
• Every dose disclosed

Check price at Legion →

Code nunopa — BOGO 50% off your first order

Caffeine-Free Pre-Workout

Legion Pulse Stim-Free

• Same actives as Pulse, zero caffeine
• Every dose disclosed

Check price at Legion →

Code nunopa — BOGO 50% off your first order

What the evidence actually says

Caffeine is the most reliable legal performance aid available. It blocks adenosine receptors, which lowers perceived effort — the same work simply feels easier. The effect on endurance is large and consistent across trials. On maximal strength and power it is smaller and less consistent, but it is still there, and it shows up most clearly when you are tired or under-slept.

The dose that appears in the research is 3–6 mg per kg of bodyweight, taken 45–60 minutes before training. For an 80 kg person that is roughly 240–480 mg. Going higher does not buy more performance; it buys jitters, a raised heart rate and a worse session.

The part the labels never mention

Caffeine has a half-life of roughly five to six hours, and longer in slow metabolisers. A 400 mg pre-workout at 6 pm still leaves around 200 mg in you at midnight. Sleep is the single biggest driver of training adaptation, so a late pre-workout can easily cost you more than it gives. If you train in the evening, a stimulant-free option is not a compromise — it is the correct choice.

Tolerance and individual variation

Tolerance to the alertness effect builds within days; tolerance to the performance effect appears to be partial at most. Variation in the CYP1A2 gene means some people clear caffeine quickly and others do not, which is why an identical dose leaves one person sharp and another anxious. Start at the low end of the range and adjust to yourself, not to the scoop size printed on the tub.

L-theanine, often paired with caffeine at roughly a 1:1 ratio, takes the edge off the jitteriness without blunting the performance benefit — one of the few stack claims that holds up.

Disclosure: every product on this page is a Legion product and we earn a commission if you buy through these links, at no extra cost to you. We do not earn anything from any other supplement brand. The link is what credits us; the code is what gets you the discount, so use both. Our dosing guidance is drawn from published human trials and is not changed by the commission.