ATP Lab E-NOS Powder 330g
- Brand ATP Lab
Most pre-workouts combine caffeine with pump ingredients. ATP Lab E-NOS is a stimulant-free pump pre-workout — the label calls it a stimulant-free pump inducer. Each scoop combines L-citrulline, L-arginine from Nitrosigine® (arginine silicate inositol), AgMass™ agmatine sulfat...
Most pre-workouts combine caffeine with pump ingredients. ATP Lab E-NOS is a stimulant-free pump pre-workout — the label calls it a stimulant-free pump inducer. Each scoop combines L-citrulline, L-arginine from Nitrosigine® (arginine silicate inositol), AgMass™ agmatine sulfate, GlycerPump™ glycerol and beta-alanine in a 20-serving citrus powder. The label's recommended use: workout supplement, athletic support.
| Ingredient | Amount / Role |
|---|---|
| Brand | ATP Lab |
| Format | Powder |
| Serving Size | 1 scoop (16.5g) — adult males, once a day, mixed in 1–2 cups of liquid immediately before consumption |
| Servings Per Container | 20 (330g) |
| L-Citrulline | 5,000 mg |
| L-Arginine (as Nitrosigine® arginine silicate inositol) | 1,500 mg |
| AgMass™ Agmatine Sulfate | 1,000 mg |
| GlycerPump™ (Glycerol) | 1,000 mg |
| Beta-Alanine | 1,500 mg |
| Flavor | Citrus |
| Label callouts | Lab tested, pharmaceutical grade, organic sweetener (as printed on the front label) |
Key Benefits
- Stimulant-free — no caffeine or other stimulants on the label
- Pump-focused formula: L-citrulline, L-arginine (as Nitrosigine®) and AgMass™ agmatine sulfate
- 5g L-citrulline per scoop
- 1.5g L-arginine from Nitrosigine®, a patented arginine silicate inositol (a registered trademark of Nutrition 21, LLC)
- 1g glycerol from GlycerPump™ — drink enough fluid before, during and after exercise, as the label advises
- 1.5g beta-alanine — may cause skin tingling (see the warnings below)
- Use on its own, or alongside a stimulant pre-workout without adding more caffeine
Best For
- Athletes who train in the evening or are sensitive to stimulants
- Anyone wanting a pump-focused formula without adding more caffeine to their stack
- Those stacking with a stimulant pre-workout to add pump volume without doubling up on stimulants
Not Ideal For
- Those looking for a pre-workout energy boost — E-NOS is pump-focused with no stimulant effect
- People who dislike the beta-alanine tingling (paresthesia) — reduce serving size if this is uncomfortable
Ingredients
Medicinal (per 16.5g scoop): Agmatine sulfate (AgMass™) 1 g, L-Citrulline 5 g, Beta-Alanine 1.5 g, L-Arginine (arginine silicate inositol, Nitrosigine®) 1.5 g, Glycerol (GlycerPump™) 1 g.
Non-medicinal: Natural citrus flavour, dextrose (2g), citric acid, organic stevia, silica, Oryza sativa (rice) hull powder.
Allergen note: Sweetened with organic stevia; contains 2g dextrose per scoop. No stimulants. Check the label on your container for allergen information.
Who Is This For?
ATP Lab pump formula is ideal for athletes who want a pump-focused workout supplement without stimulants. It suits those who train late, are sensitive to caffeine, or want to add a pump product to their existing pre-workout.
Who Is This NOT For?
Not a standalone energy supplement — it provides no stimulant energy. Not necessary for casual exercisers who do not prioritize pump or vascularity.
Warnings (from the label)
- Do not use if you have had a heart attack/myocardial infarction.
- Consult a health care practitioner prior to use if you suffer from a cardiovascular disease and are attempting an increase in physical activity; if you have a renal/kidney disease or are following a low protein diet; or if you are taking medication for cardiovascular diseases, erectile dysfunction and/or blood thinners.
- Ensure to drink enough fluid before, during and after exercise.
- May cause a flushing, tingling and/or prickling sensation of the skin, in which case, reduce the dose. Gastrointestinal discomfort has been known to occur, in which case discontinue use.
- Label dose: adult male, 1 scoop 1 time per day, mixed well in 1–2 cups of liquid immediately before consumption. For use beyond 3 weeks, consult a health care practitioner.
Why Buy From Bulldog Nutrition?
Bulldog Nutrition is an authorized Canadian and US retailer of ATP Lab products. We source directly from the brand — never from grey market or unauthorized distributors — so every order is genuine and fresh.
- ✓ Authorized ATP Lab retailer — authentic products only, never grey market or counterfeit
- ✓ Ships across Canada and the US — fast, reliable delivery to your door
- ✓ Online since 2016
- ✓ Ongoing support available — reach us anytime via email or live chat
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