A flat number hides weight-scaled research underneath
Consumer creatine products commonly display a flat dosage recommendation — "take 5 grams daily" — regardless of the user's body weight, even though the research these recommendations are generalized from typically expresses dosing on a per-kilogram basis, commonly cited around 0.03 g/kg/day for maintenance dosing.
Why weight-scaling matters more at the extremes
A flat 5-gram recommendation happens to land reasonably close to the weight-scaled research range for someone around 70kg (about 154 lb), but the gap widens meaningfully for someone significantly lighter or heavier — a flat number was never designed to scale, it was chosen as a single convenient figure that approximates the middle of a population's actual weight distribution.
The loading phase is an even more commonly generalized figure
A creatine loading phase — a higher initial dose for 5-7 days intended to saturate muscle creatine stores faster — is commonly cited in research around 0.3 g/kg/day, a figure that scales even more noticeably with body weight than the maintenance dose, making a flat generic loading-phase number a rougher approximation still.
Why NMN dosing is presented differently in this calculator
Unlike creatine, NMN dosing in human clinical research has generally not been established on a weight-scaled basis — studies commonly test fixed dose ranges regardless of participant body weight. Presenting an NMN range as weight-scaled would overstate the precision of the current research, which is why this calculator shows the commonly studied NMN range as a flat reference figure rather than computing a weight-scaled number that the underlying research doesn't actually support.
Reference information is not the same as a personalized recommendation
Even a mathematically correct weight-scaled range is still general reference information generalized from population-level research — individual factors like kidney function, existing medications, and other health conditions can meaningfully change what dose is appropriate for a specific person, which is why this kind of calculator is explicitly informational, not a substitute for guidance from a healthcare provider familiar with an individual's full health picture.
Frequently Asked Questions
The underlying creatine dosing research is commonly expressed on a per-kilogram basis (around 0.03 g/kg/day for maintenance), but consumer product labels default to one flat number as a population-level approximation, which fits reasonably well only near the middle of the weight distribution the number was generalized from.
A creatine loading phase uses a higher initial dose (commonly cited around 0.3 g/kg/day) for 5-7 days to saturate muscle creatine stores faster than maintenance dosing alone would — a temporary, higher-dose phase before returning to standard maintenance dosing.
NMN dosing in human clinical research has generally been tested at fixed dose levels rather than scaled by participant body weight — presenting a weight-scaled NMN number would overstate the precision of research that doesn't actually support that level of personalization.
No — it presents commonly cited reference ranges from published research, clearly labeled as informational. Individual factors like kidney function and existing medications can meaningfully change what's appropriate for a specific person, so consult a healthcare provider before starting any supplement.
No. All calculation happens locally in your browser — your body weight and other inputs are never uploaded or logged.