Start with the full Pulse name
Legion Athletics sells several Pulse pre-workouts, so a useful comparison begins with the exact version. The manufacturer’s current Pulse page distinguishes original Pulse, Pulse Stim-Free, Pulse+ Burn and Pulse+ Pump. Choosing by brand alone can obscure the biggest difference for your routine: whether the drink contains caffeine.
Original Pulse pairs caffeine with L-theanine. Stim-Free omits caffeine, while Burn and Pump have their own added ingredients. Check the selected product’s Supplement Facts rather than assuming every Pulse tub follows the original recipe.
What one scoop changes
For original Pulse, the published full serving is two scoops, providing 350 mg caffeine and 350 mg L-theanine. Its other listed amounts include 8 g citrulline malate, 3.6 g beta-alanine and 2.5 g betaine. The label identifies alpha-GPC as a 50% ingredient preparation.
One scoop supplies 175 mg caffeine and half the other active-ingredient quantities. On a 20-serving tub, that means approximately 40 one-scoop uses or 20 two-scoop uses. Reducing the scoop count changes the whole formula, so compare another product using the amount you actually intend to take.
Put the caffeine number in context
The FDA’s caffeine guidance cites 400 mg daily as an amount generally not associated with negative effects for most adults, while emphasizing substantial individual differences. That figure includes coffee, tea and other sources; it is not a target or an assurance that a 350 mg serving will suit you.
Consider your training time, usual caffeine intake and sensitivity before selecting a version. A formula’s L-theanine content should not be treated as permission to ignore its caffeine.
Compare ingredient forms and realistic expectations
Citrulline malate includes malate, so its total weight cannot be compared directly with the same weight of standalone L-citrulline. The NIH supplement review also describes mixed evidence for citrulline’s performance effects. Ingredient amounts make a comparison clearer; they do not guarantee a particular workout outcome.
For a practical shortlist, write down the version, serving size, caffeine and delivered price per intended use. Then consider taste and tolerance separately. This is a source-based buying guide, with no claim of firsthand testing or a universal best choice.
Product pages and existing offers
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Sources and review notes
Reviewed October 11, 2026. Legion Pulse manufacturer product page and FAQ. FDA: Spilling the Beans. NIH ODS: Exercise and Athletic Performance. This is editorial guidance based on identified labels and sources, not a report of personal product testing. Product versions and offers can change.
