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A visible or perceived muscle pump is a short-term observation. It is not a measurement of lasting muscle growth, faster recovery or cardiovascular health. A plausible ingredient mechanism also does not prove those outcomes for a finished supplement.
What the exercise studies measured
A citrulline-malate crossover trial found no added acute muscle swelling or overall bench-press benefit under its test conditions. A separate L-citrulline trial found no benefit for the measured perceived pump, strength, endurance or muscle oxygenation outcomes.
These small, acute trials do not settle every possible use. They do show why “more pump” and “more muscle” should not be treated as interchangeable claims.
Two different label examples
The Blueberry Pomegranate PUMP-OCALYPSE panel lists 3 g L-citrulline and 3.5 g HydroPrime glycerol powder standardized to at least 65% glycerol. The powder weight is not a pure-glycerol amount.
The reviewed Miami Original Pre-Workout panel lists 6 g citrulline malate (2:1), rather than 6 g pure L-citrulline, and 200 mg caffeine. These formulas should not be compared by treating every gram or ingredient form as identical.
Read warnings before combining products
A non-stimulant description or absence of listed caffeine does not establish zero side effects, sleep compatibility or universal stacking safety. Follow the purchased container’s directions and consider overlapping ingredients.
Use the product catalog for exact labels and current offer terms. Neither a product photo nor an affiliate link verifies a vascularity, strength or recovery result.
Product-label source: the manufacturer’s product page. Evidence reviewed October 10, 2026. Current prices, promotions and eligibility are determined at checkout.
