Legion Pulse is the all-natural answer to the same question Transparent Labs BULK answers: can you get clinically-dosed, fully-disclosed actives without a proprietary blend or a pile of artificial additives? Pulse delivers 8 g of citrulline, 3.6 g of beta-alanine, 2.5 g of betaine and 300 mg of Alpha-GPC — every dose on the label — with natural sweetening, no artificial dyes, and manufacturing in ISO 17025-accredited labs. That combination of research-level doses and genuine third-party-quality testing is what puts it a clear second in a transparency-and-dose-first ranking. Where it diverges from BULK is the stimulant: Pulse runs a stronger 350 mg of caffeine, but buffers it with an equal 350 mg of L-theanine for smoother, jitter-balanced focus — and a caffeine-free version exists for evening training. The honest knocks are a smaller 21-serving tub (the full dose is two scoops) that makes it one of the pricier picks at about $2.14 a serving, and no creatine, which Legion sells separately. For a lifter who wants clinically-dosed actives, natural sweetening and published lab testing, Pulse is one of the strongest formulas on the shelf.
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Read the complete Pre-Workout guide →A genuinely clinical label: 8 g citrulline for the pump, 3.6 g beta-alanine (above the 3.2 g research dose), 2.5 g betaine and 300 mg Alpha-GPC for focus, all disclosed. Just a touch behind BULK (#1) only because that formula carries 4 g beta-alanine; otherwise this is a top-tier actives profile. The absence of creatine (sold separately) is the only gap.
Every dose disclosed with no proprietary blends, and backed by a stronger quality signal than most: Legion states manufacturing in ISO 17025-accredited labs and publishes lab testing. That puts it among the most transparent and best-verified labels here — only fractionally behind BULK on pure disclosure, and ahead of most of the field on independent testing.
A strong 350 mg caffeine, but sensibly handled: it's paired with an equal 350 mg of L-theanine for smoother, calmer focus, and Legion offers a caffeine-free version with the same actives for stim-free training. The dose is higher than ideal for caffeine-sensitive users, which holds the score below BULK's moderate 200 mg, but the theanine buffer and the stim-free option are real credits.
The weakest axis. The full dose is two scoops, so a tub yields only 21 servings at about $2.14 each — among the most expensive here and roughly five times Nutricost's (#6) cost per scoop. The price reflects clinical doses plus natural sweetening and lab testing rather than a markup on filler, but as pure cost-per-serving it loses to most of the lineup.
The Blue Raspberry flavor is naturally sweetened with no artificial dyes and widely rated as clean and easy to drink, mixing without notable grit. A reliably palatable daily option, and a meaningful plus for anyone avoiding artificial sweeteners or colors.
“All clinical doses, fully disclosed, no proprietary blends.”
The label states 8 g citrulline, 3.6 g beta-alanine, 2.5 g betaine and 300 mg Alpha-GPC individually with no combined blend. The citrulline and beta-alanine sit at the levels used in the trials we cite (e.g. ~8 g citrulline malate in Pérez-Guisado 2010), so the claim is accurate and verifiable.
“Naturally sweetened, no artificial food dyes.”
Per the listing, Pulse uses natural sweetening and contains no artificial dyes — consistent with Legion's all-natural positioning and unusual at this dose level. Auditable from the ingredient panel.
“350 mg L-theanine smooths the caffeine for clean, jitter-free energy.”
Mechanistically supported but individual. Caffeine paired with L-theanine has trial support for smoother attention versus caffeine alone, and the 1:1 dose here is generous — but 'jitter-free' still depends on personal caffeine tolerance, and 350 mg is a high dose. Accurate as a tendency, not a guarantee for every user.
Pulse hits the doses that matter — 8 g citrulline for blood flow (Pérez-Guisado 2010 used 8 g of citrulline malate), 3.6 g beta-alanine for the muscular-endurance buffer (above the 3.2 g research standard), plus 2.5 g betaine and 300 mg Alpha-GPC — and does it while staying naturally sweetened with no artificial dyes. Very few fully-dosed pre-workouts manage both. If you want research-level actives but avoid sucralose and food colorings, this is one of the only products that doesn't ask you to compromise.
At 350 mg, Pulse's caffeine is well above BULK's (#1) moderate 200 mg, which is a genuine consideration for stim-sensitive users. But Legion pairs it 1:1 with 350 mg of L-theanine to smooth the focus, and — crucially — sells a caffeine-free version of Pulse with the identical actives. That means you can choose the strong-stim version for morning training or the zero-caffeine version for evenings, without giving up the pump-and-endurance formula either way.
Beyond disclosure, Legion states its products are manufactured in ISO 17025-accredited labs and publishes lab results — a stronger independent-quality signal than most competitors in this category provide. In a market where label accuracy varies and proprietary blends hide doses, verifiable third-party testing is worth real money, and it's part of why Pulse ranks where it does despite the smaller, pricier tub.
Because the full dose is two scoops, each tub delivers only 21 servings at roughly $2.14 each — one of the highest costs per serving in the lineup. There's no creatine in the formula either; Legion sells it separately. Neither undercuts the quality of what's in the scoop, but if you want the cheapest legitimate option, Nutricost (#6) gives you 60 disclosed-dose servings for a fraction of the price.
Legion Pulse is the formula to choose when you want everything BULK offers — clinically-dosed, fully-disclosed actives with no proprietary blend — but specifically prefer natural sweetening, published lab testing, and the option of a stronger (or zero) caffeine dose. Its 8 g citrulline, 3.6 g beta-alanine, 2.5 g betaine and 300 mg Alpha-GPC are all on the label, it's made in ISO 17025-accredited labs, and the 350 mg caffeine is buffered 1:1 with L-theanine for smoother focus. It lands at #2 rather than #1 on two honest points: the full dose is two scoops, so a tub is only 21 servings at about $2.14 each — one of the priciest here — and there's no creatine in the formula. Neither dents the quality of what's in the scoop. If cost per serving is your priority, Nutricost (#6) is far cheaper; if you want the most moderate stimulant, Transparent Labs BULK (#1) edges it. But for a lifter who wants research-level actives without artificial dyes, plus the flexibility of a caffeine-free version, Pulse is one of the strongest formulas in the lineup.
Check Legion · 8g citrulline malate · 3.6g beta-alanine · 350mg caffeine · 21 servings on AmazonThe #1 overall — 8 g citrulline malate, 4 g beta-alanine and a more moderate 200 mg caffeine, all disclosed, at a lower cost per serving. Pick this if you want the smoothest moderate-stim default.
See it on the list →The loaded premium option — 10 g citrulline, 5 g creatine and 3.2 g beta-alanine across 21 disclosed ingredients. Pick this if you want creatine in the scoop and a bigger stimulant.
See it on the list →The value leader — 60 disclosed-dose servings at about $0.42 each with third-party ISO-lab testing. Pick this if the lowest cost per serving matters most.
See it on the list →A single 8 g dose of citrulline malate significantly increased bench-press repetitions and reduced 24-48 h soreness versus placebo. The human trial behind Pulse's 8 g citrulline dose — at the level the evidence supports.
Pooling 15 studies, beta-alanine improved performance with the benefit concentrated in 60-240 s efforts, dosed around 3.2-6.4 g/day to saturate muscle carnosine. The basis for Pulse's 3.6 g beta-alanine — above the standard research dose, effective over weeks rather than from one scoop.
The ISSN position stand puts caffeine's effective range at ~3-6 mg/kg pre-exercise. Pulse's 350 mg is a strong dose (around 4-5 mg/kg for an 80 kg lifter) — within the ergogenic range but high for the caffeine-sensitive, which is why the caffeine-free version matters.
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