Do you mean Dymatize ISO 100 when you wrote “ISO 100 100 ISO 100 45 S”? — If yes, here’s a breakdown of what ISO 100 is, what you get per serving, and what “45 S” or similar terms might refer to. ?What is ISO 100? ISO 100 is a whey‑protein isolate powder from Dymatize, often hydrolyzed for extra fast absorption.  It’s designed to give “clean” protein — minimal carbs, fats, lactose — ideal for lean muscle building, cutting phases, or people watching macros. Typical Nutrition per Serving (≈ 30–31 g scoop): Nutrient / Feature Amount per Serving* Protein ~ 25 g  Calories ~ 110–120 kcal  Carbohydrates ~ 1–2 g total carbs  Fat ~ 0–0.5 g fat  BCAAs (branch‑chain amino acids) ~ 5.5 g per serving — including ~ 2.7 g Leucine (key for muscle protein synthesis)  Lactose / Sugars Very low — often marketed as “lactose‑free or minimal lactose / <1 g sugar” * Exact macros may vary slightly depending on flavor or batch. What ISO 100 Is Good For? Post‑workout recovery: Because the whey isolate is hydrolyzed and fast‑absorbing — helps quickly deliver amino acids to muscles.  Lean muscle building / cutting / low‑carb or low‑fat diets: The minimal carbs/fat profile helps you meet protein goals without excessive calories or unwanted macronutrients. Macronutrient control / lactose or digestive‑sensitive individuals: Since lactose, fat, carbs are low, it's easier on digestion (vs heavier whey blends).