CARTERˣ — Field Notes
News
Notes, protocols and editorials from the lab. Long reads on training, recovery, and the science behind every system.
ingredient-science
Whey Protein Isolate vs Concentrate: Why Purity Matters
Concentrate and isolate look similar on the front of the tub. They are not the same product. The processing difference shows up in protein...
education
Vitamin K2 and D3: Why They Belong Together
Vitamin D3 pulls calcium into your bloodstream. Vitamin K2 directs it to your bones rather than your arteries. One without the other is incomplete.
education
Beta-Alanine Tingles, Explained
That pre-workout tingle is not a side effect. It is a sign your formula contains a clinical dose of beta-alanine.
education
EPA vs DHA: Which Omega-3 Athletes Actually Need
Not all omega-3 is built the same. EPA and DHA do different things, and the ratio matters more than most supplement brands will tell...
education
What to Look for in a Pre-Workout (And What to Avoid)
Most pre-workouts on the market are underdosed, overstimmed, or both. A clinical-grade formula is built around a handful of ingredients at the right amounts.
education
Caffeine and L-Theanine: The Smart Caffeine Stack
Caffeine alone is a blunt tool. Caffeine paired with L-theanine is the same dose, smoother delivery, and better cognitive output. Research has known this...
education
Branded Ingredients: Why We Use Cognizin and AstraGin
Generic ingredients are cheap. Branded, patented versions are more expensive and come with the clinical research that generics do not. The difference shows up...
education
Sweat Rate and Sodium: The Hydration Science Most Athletes Miss
Most sports drinks are dosed for office workers, not athletes. Real sweat losses require real sodium. Here is the math.