Determination of maintenance Jarlsberg® cheese dose to keep the obtained serum osteocalcin level; a response surface pathway designed de-escalation dose study with individual starting values
DOI:
https://doi.org/10.18203/2349-3259.ijct20212841Keywords:
Dose de-escalation, Increased osteocalcin level, Jarlsberg® cheese, Osteocalcin ratio, RSP-design, Vitamin K2Abstract
Background: Daily maximum effective dose (MED) of Jarlsberg® increased the serum osteocalcin (tOC) level, vitamin K2 and affected the lipid pattern positively. The aim of the study was to estimate and verify a daily maintenance dose.
Methods: 12 healthy female volunteers (HV) were included in a de-escalation study after a six week run-in period on the daily MED of 57 g Jarlsberg® cheese. A 3-level within-patient response surface pathway (RSP) design with individual starting values was developed. Another 12 HVs were included in a new study with a six week run-in period on MED followed with six weeks on the estimated maintenance dose. All HVs were premenopausal female between 20 and 52 years of age. The main variable in the studies was the tOC level.
Results: tOC, cOC and the vitamin K2 variants increases significantly (p<0.01) during the run-in period on daily MED of Jarlsberg® in both studies. The maintenance daily dose was estimated to 45 g (95% CI: 38-52 g/day) and used in the new study. The tOC level was reduced from 19.8 ng/ml (95% CI: 12.0-27.6) obtained in the run-in period to 18.5 ng/ml (95% CI: 11.7-25.3) during the maintenance part. This represents a reduction of 6.6%. The sum of vitamin K2 variants changed from 0.58 ng/ml on MED of Jarlsberg® to 0.59 ng/ml (95% CI: 0.37-0.82) during the maintenance period.
Conclusions: Daily MED of Jarlsberg® cheese increases tOC, cOC and the vitamin K2 level. The maintenance Jarlsberg® dose was estimated to 45 g/day and verified as sufficient.
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