Gaspari Nutrition - SizeOn

Gaspari Nutrition SizeOn Maximum Performance is the Ultimate Hybrid Intra-Workout Whey Hydrolysate Creatine Formula — the original SizeOn became known as the "King of Creatines," and this evolved formula pushes further with a four-matrix system built specifically for use WHILE you train. The formula combines a Carbohydrate Energy Matrix (Trehalose, Dextrose, Cyclic Dextrin, and the insulinotropic compound Pterostilbene), a Protein Synthesis Acceleration Matrix built on rapidly absorbed Whey Protein Hydrolysate with an industry-leading 4g of L-Leucine, a tri-phase PhosphoDrive Endurance Complex (Creatine Monohydrate, Creatine MagnaPower®, and Disodium Creatine Phosphate) for unmatched creatine bioavailability, and an OsmoDrive Advanced Hydration Complex (L-Taurine, three glycerophosphate electrolyte forms, and Sustamine® L-Alanyl-L-Glutamine) for hydration and cell volumization. SizeOn accelerates protein synthesis, increases muscle volume and fiber size, and delivers vital nutrients directly to skeletal muscle tissue while you're still training — not just after. Take once daily on training days while you train, 5-6 days per week. Mix 1 scoop in 20-30oz of cold water and sip throughout your workout. 24 servings per container. Contains Milk and Soy.†

Supplement Facts — Gaspari Nutrition SizeOn Maximum Performance (Per 1 Scoop / 68g / 24 Servings)

• Calories: 190

• Total Fat: 0g

• Cholesterol: 15mg (5% DV)

• Total Carbohydrate: 40g (13% DV)

• Dietary Fiber: 0g

• Sugars (from Trehalose and Dextrose): 39g

• Protein: 7g (14% DV)

• Vitamin C (as Ascorbic Acid): 60mg (100% DV)

• Thiamin (as Thiamin Hydrochloride): 10mg (667% DV)

• Riboflavin (as Riboflavin-5-Phosphate): 7.6mg (447% DV)

• Niacin (as Niacinamide): 50mg (250% DV)

• Folate (as Folic Acid): 200mcg (50% DV)

• Vitamin B12 (as Methylcobalamin): 75mcg (1,250% DV)

• Pantothenic Acid (as D-Calcium Pantothenate): 9mg (92% DV)

• Calcium: 51mg (5% DV)

• Phosphorus: 65mg (7% DV)

• Magnesium: 45mg (11% DV)

• Sodium: 235mg (10% DV)

SizeOn Blend — 63g

• Carbohydrate Energy Matrix: Trehalose, Dextrose, Cyclic Dextrin, Pterostilbene

• Protein Synthesis Acceleration Matrix: Whey Protein Hydrolysate, L-Leucine (4g), L-Isoleucine, L-Valine

• PhosphoDrive Endurance Complex: Creatine Monohydrate, Creatine MagnaPower® (Magnesium Creatine Chelate), Disodium Creatine Phosphate

• OsmoDrive Advanced Hydration Complex: L-Taurine, Sodium Glycerophosphate, Calcium Glycerophosphate, Potassium Glycerophosphate, Sustamine® (L-Alanyl-L-Glutamine), Magnesium Glycyl Glutamine

• Other Ingredients: Malic Acid, Citric Acid, Salt, Silica, Natural and Artificial Flavor, Beet Root Powder (color), Sucralose, Acesulfame Potassium

• Contains Milk and Soy

• 24 servings per container

• Take once daily on training days while you train, 5-6 days per week

• Mix 1 scoop in 20-30oz of cold water and sip throughout your workout

• California Prop 65 Warning applies.

A Note on the 2026 "Get Swole" Reformulation

Gaspari has recently rebuilt SizeOn for 2026 under the "Get Swole" naming, with real changes: the previous whey protein hydrolysate base is replaced by Amino9®, a trademarked blend of all nine essential amino acids from Compound Solutions; HMB (Calcium Beta-Hydroxy-Methyl-Butyrate Monohydrate) is added to the protein synthesis matrix for the first time, adding a genuine anti-catabolic layer; creatine jumps from 4g to 6g; and the entire formula is now completely dairy-free. Old tubs of Maximum Performance will still be around for a while, so check the label on whichever container you're holding to confirm which formula you actually have — the two are meaningfully different products despite sharing the SizeOn name.†

Why L-Leucine at 4g Is the Anchor of the Protein Matrix

Leucine is the specific branched-chain amino acid that directly activates the mTOR pathway — the primary signaling cascade that initiates muscle protein synthesis. At 4g per serving, SizeOn delivers well above the commonly cited 2-3g Leucine threshold needed to maximize this signal, layered on top of Whey Protein Hydrolysate that's proven by clinical research to absorb even faster than free-form amino acids, since it's already broken down into di- and tripeptides the body can use with minimal digestive delay. This combination is specifically what allows SizeOn to claim measurable increases in muscle volume and amino acid delivery to muscle tissue during the workout itself, not just afterward.†

PhosphoDrive — A Tri-Phase Creatine Blend

Rather than relying on Creatine Monohydrate alone, SizeOn's PhosphoDrive Endurance Complex combines three distinct creatine forms: standard Creatine Monohydrate, Creatine MagnaPower® (a magnesium-bound creatine chelate with documented research on ATP regeneration), and Disodium Creatine Phosphate. This tri-phase approach is designed to offer more complete bioavailability, absorption, and utilization than a single creatine form — sustaining ATP production during prolonged high-intensity training rather than a single creatine pool that could saturate or clear at one uniform rate.†

OsmoDrive — Hydration Through Glycerophosphates and Sustamine®

The OsmoDrive Advanced Hydration Complex uses Sodium, Calcium, and Potassium Glycerophosphate — organic phosphate salts that deliver electrolytes alongside phosphate, a component directly involved in ATP and phosphocreatine energy systems. L-Taurine adds cellular osmolyte and hydration support, while Sustamine® (L-Alanyl-L-Glutamine) is a dipeptide-bonded form of glutamine documented for superior stability and absorption compared to free-form L-Glutamine, supporting hydration, gut integrity, and recovery simultaneously during the intra-workout window.†

Pterostilbene — The Insulinotropic Secretagogue

Pterostilbene, a compound structurally related to resveratrol, is included in the Carbohydrate Energy Matrix specifically for its insulinotropic properties — supporting more efficient glucose and nutrient uptake into muscle tissue during the intra-workout carbohydrate delivery window. Combined with Trehalose, Dextrose, and Cyclic Dextrin (carbohydrate sources chosen for their different absorption rates), Pterostilbene is intended to enhance the nutrient-partitioning effect of the carbohydrate blend as a whole.†

Frequently Asked Questions

1. Do I need to take a separate BCAA product with SizeOn?
   No — SizeOn has a full serving of BCAAs built into the Protein Synthesis Acceleration Matrix (L-Leucine, L-Isoleucine, L-Valine), so a separate BCAA product is not necessary.†

2. When should I drink SizeOn?
   Take once per day, on training days, WHILE you train — mix 1 scoop in 20-30oz of cold water and sip throughout your workout, adding more water as needed for proper hydration. This is an intra-workout product, meant to be consumed during training rather than before or after.†

3. How is the 2026 "Get Swole" version different from Maximum Performance?
   The 2026 reformulation replaces whey protein hydrolysate with Amino9® (a complete essential amino acid blend), adds HMB for anti-catabolic support, increases creatine from 4g to 6g, and makes the entire formula dairy-free. If you specifically need a dairy-free intra-workout, confirm you're getting the 2026 "Get Swole" formula rather than older Maximum Performance stock.†

4. Is SizeOn appropriate for tested athletes?
   Based on the disclosed formula — creatine, amino acids, electrolytes, carbohydrates, and Pterostilbene — SizeOn does not appear to contain compounds prohibited by WADA or NCAA. Tested athletes should review the complete label and verify with their governing body as standard practice.†

How to Take Gaspari Nutrition SizeOn

Take once per day, on training days, while you train — 5-6 days per week. Mix 1 scoop in 20-30oz of cold water and sip throughout your workout, adding more water as necessary for proper hydration. Not intended for use on non-training days. Consult a physician before use if you have any medical condition or are taking any prescription medications. Contains Milk and Soy. California Prop 65 Warning applies.†

Why Buy at Get Yok'd

• Real-time inventory across all five Southern California stores

• Available in Burbank, Glendale, Glendale Galleria, Pasadena, and North Hollywood

• Authorized Gaspari Nutrition retailer — carrying SizeOn alongside SuperPump Aggression, Anavite, and the full Gaspari Nutrition performance lineup

• Staff who can confirm whether current stock is the Maximum Performance or newly reformulated 2026 Get Swole version

• One of the best loyalty programs in the supplement industry — earn rewards on every purchase

Who Should Exercise Caution with SizeOn

• Contains Milk and Soy — not appropriate for individuals with these allergies (unless using the dairy-free 2026 reformulation)

• Individuals with diabetes or blood sugar regulation concerns should consult a physician — 39g of sugar per serving is a significant carbohydrate load

• Individuals with kidney disease should consult a physician — creatine and additional daily protein intake increase renal processing demand

• Not for pregnant or nursing women without physician clearance

• Consult a physician before use if taking any prescription medications or having any medical condition

• California Prop 65 Warning applies.

• Keep out of reach of children.

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.