Muscle & Strength Creatine Dosing
DeLauer synthesizes a 2021 Nutrients study identifying 7 g as the new sweet spot, an October 2023 meta-analysis showing differential strength gains (upper +10 lbs, lower +25 lbs), and the hypothesis that creatine transporter density varies by muscle group. He notes that androgen receptors also differ, making this plausible. For upper body, a loading phase (20 g/day for a few days then 5 g) forces saturation of fewer transporters; for lower body, a consistent moderate-high dose works because of abundant transporters. He personally titrates his dose based on training focus, stress, and sleep, suggesting flexibility.
SLC6A8 transporter density is higher in lower body muscles, allowing efficient uptake from steady dosing. Upper body muscles have fewer transporters, requiring a high concentration gradient (loading) to drive creatine into cells. Once saturated, a lower maintenance dose sustains levels.
I titrate and adjust my creatine dose all the time depending on if I'm running more, lifting more, more stressed, not sleeping as well. And I find that I've kind of have this little performance adjustment that I do.
7 grams is the sweet spot. That kind of throws away the old 5 g.

