ISO 100 Whey Protein Powder - Fast Digesting Vanilla 3 lb

Our review of ISO 100 Whey Protein Powder finds it best suited to lifters and athletes who prioritize fast digestion and a high protein-to-calorie ratio. The single biggest reason to buy is the product's use of hydrolyzed, 100% whey protein isolate that delivers 25 grams of protein and 5.5 grams of BCAAs per serving while keeping fat and sugar under 1 gram, which makes it an efficient postworkout fuel for rebuilding muscle without extra carbs or fat. For anyone focused on lean gains and quick absorption, this formula is a clear choice.

Key Features

• High protein per serving: Each serving provides 25 grams of protein to support muscle repair and recovery after resistance exercise.
• Hydrolyzed whey isolate: The pre-hydrolyzed 100% whey protein isolate is formulated for faster digestion and absorption than concentrate-based powders.
• Branched-chain amino acids: With 5.5 grams of BCAAs including 2.7 grams of L-Leucine, it supplies key amino acids linked to muscle protein synthesis.
• Low in fat and sugar: Less than 1 gram of fat and less than 1 gram of sugar per serving keeps calories focused on protein.
• Purity-focused processing: Cross-flow microfiltration and multi-step purification reduce carbohydrates, lactose and cholesterol while preserving muscle-building fractions.
• Gluten free and low lactose: The formula is gluten free and contains under 0.5 grams of lactose per serving, easing digestion for many users.

Who It's For

ISO 100 is ideal for strength athletes, bodybuilders, and gym-goers who want a high-quality, fast-absorbing protein source to take immediately after training or between meals. Those cutting body fat while protecting lean mass will appreciate the low sugar and fat profile combined with concentrated protein and BCAAs.

It is less appropriate for people seeking a cheaper mass-gain blend, those who prefer whole-food protein sources, or users needing a multi-ingredient recovery supplement with added carbs for endurance events. Anyone with a severe dairy allergy should avoid it despite the low lactose content.

Pros & Cons

Pros

• Fast-digesting hydrolyzed whey isolate supports quicker amino acid uptake after workouts.
• High BCAA content, including 2.7 g of L-Leucine, helps stimulate muscle protein synthesis.
• Very low fat, sugar and lactose make it suitable for lean diets and those sensitive to lactose.
• Produced with filtration and purification processes that emphasize purity and taste.

Cons

• Price per serving tends to be higher than concentrate-based proteins due to the isolate and hydrolysis processes.
• Not formulated for users who need added carbohydrates or multi-ingredient recovery blends.

Specifications

Brand	Dymatize
Net weight	3 lb (48 oz)
Protein per serving	25 g
BCAAs per serving	5.5 g (including 2.7 g L-Leucine)
Fat per serving	< 1 g
Sugar per serving	< 1 g
Key ingredient	Hydrolyzed 100% whey protein isolate

Our Verdict

ISO 100 is a focused, premium whey isolate best for anyone serious about lean muscle gains and quick postworkout recovery. Its combination of hydrolyzed isolate, solid BCAA content and minimal fillers makes it good value for athletes who prioritize performance and digestion over low-cost bulk protein.

Frequently Asked Questions

Is this suitable for lactose-intolerant users?
It is low in lactose (under 0.5 g per serving) and easier to digest than concentrate, but those with severe lactose intolerance should proceed cautiously.

How many servings are in a 3 lb tub?
The 3 lb size provides approximately 43 servings per tub based on the manufacturer's serving size.

When is the best time to take it?
For most users the best time is postworkout for rapid amino acid delivery, or between meals to boost daily protein intake.