ISO 100 77 S

What we know about ISO 100 serving‑counts?

• ISO 100 is sold in tubs whose serving‑count depends on package size. A 5-lb (≈ 2.27 kg) tub often contains ~ 76–77 servings. 

• Nutrition facts per serving remain roughly the same: ~ 25 g whey protein isolate per scoop, ~ 5.5 g BCAAs, ~ 0–1 g carbs/sugar, ~0 g fat, ~110–120 calories. 

• Package labels with “71 servings”, “76 servings”, or “77 servings (77S)” reflect how many scoops are included — helpful to know how long one tub lasts. 

What “77 S” likely means?

So if you see a label “ISO 100 77 S”, it most likely means:

• “ISO 100” = the product name (whey‑protein isolate from Dymatize)

• “77 S” = 77 servings in this container

Thus it indicates a full‑size tub (often around 5 lb / 2.27 kg) — not a small trial pack.

What to check when using that info?

Because “servings” depend on both tub size and scoop size:

• Always check the serving size in grams on the label (usually ~ 30–32 g) to know how much powder equals one serving. 

• Consider how often you’ll use it (e.g. once per day vs multiple shakes) to calculate how long 77 servings will last.

• Watch for consistency: sometimes similar tubs are labelled “71 S”, “76 S”, “77 S” depending on formula, flavor or region. 

Conclusion: “ISO 100 77 S” very likely refers to Dymatize ISO 100 — a ~ 2.27 kg / 5‑lb container with ~ 77 servings.