Fairlife Core Power Elite 42g Protein Shake (Chocolate): Labelgrade B+

42 g of protein per 14 fl oz (414 ml) bottle — about 10 g per 100 ml (USDA FDC 2668980). That's a protein-per-calorie ratio of 5.5 cal per gram of protein — within striking distance of plain chicken breast (5.3 cal/g). Among ready-to-drink shakes, only Fairlife Elite and a few sports-recovery niche products hit 42 g per bottle.

Same brand, two product lines. Core Power 'Original' is 26 g protein per 11.5 fl oz at 170 calories — a general-purpose protein milk shake. Core Power 'Elite' is 42 g per 14 fl oz at 232 calories — engineered specifically for athletes who need a 40+ g post-workout dose. Both use the same ultra-filtered Fairlife milk base. Elite is roughly 60% more protein per bottle at 35% more calories and a higher price point.

Ultra-filtration. Standard milk has ~3-4% protein by mass. Fairlife runs the milk through a microporous filter that concentrates the protein and calcium fraction while removing water and most of the lactose. Elite is filtered more aggressively than regular Fairlife or Core Power, hitting ~10% protein density. The protein IS real milk protein (casein + whey in roughly 4:1 ratio) — not added whey isolate.

Four sweeteners: acesulfame potassium (ace-K), monk fruit juice concentrate, stevia leaf extract, sucralose. Each has a different sweetness profile and bitterness aftertaste; combining four in smaller amounts each often tastes better than a higher dose of one. None are added sugar — the 7 g of sugar on the label is naturally-occurring lactose. The trade-off: four artificial/natural-zero-cal sweeteners is a lot for one product, and not everyone tolerates them well.

Carrageenan is a seaweed-derived stabilizer used in most RTD dairy products to prevent separation. FDA-recognized as safe. Some studies suggest degraded carrageenan can cause GI inflammation; the carrageenan used in food is the un-degraded form. People with IBS or sensitive GI sometimes avoid it as a precaution. For most users it's fine.

Per-bottle, the protein leader. Premier Protein Vanilla: 30 g per 11.5 fl oz at 160 cal. ON Gold Standard RTD Vanilla: 24 g per 11 fl oz at 150 cal. Quest Vanilla: 30 g per 11 fl oz at 160 cal. Elite 42 g is the outlier at the top — about 40% more protein per bottle than the next tier. It's also more expensive per bottle (~$4-5 vs $2.50-3.50 for Premier/Quest). On a per-gram-of-protein cost basis, Elite is roughly competitive but not the cheapest.

Yes. The ultra-filtration removes most lactose; added lactase enzyme handles the residual. People with lactose intolerance generally tolerate it well. People with milk-protein allergies should still avoid it — Elite is highly concentrated in milk protein.

Effectively, yes. 232 calories with 42 g protein, 9 g carbs, 3.5 g fat, plus calcium (~70% DV), vitamin D, and potassium. The macros are well-balanced for a meal-light option. The trade-offs: only 2 g fiber, and the carbohydrate is mostly lactose (no slow-burn complex carbs). For a sustained-energy meal, pair with fruit or oats. For a fast recovery hit post-workout, it's purpose-built.

Yes — milk protein contains all 9 essential amino acids in proportions appropriate for human muscle protein synthesis. Casein (the slow-digesting fraction) is particularly rich in leucine, which triggers muscle protein synthesis. The 'Complete Protein' label callout is technically accurate.