To batch rename incrementally. Select a group of items, and then, on the Action menu, click Batch Rename. On the Rename Options menu, select Date. This command automatically inserts the IPTC Date Created, the EXIF Capture Date, or the file Creation Date, in that order.
However, PTH can change due to renal function, exercise level, the time of day, or even diet. There has been no consensus on the optimal level of vitamin D intake to reduce PTH, and this is why many laboratories report the normal range of vitamin D to be so wide (20 to 40 ng/ml, or in some cases, 50 to 100 nmol).
If you don't get a lot of sun and think you might be deficient, then you need to see a doctor and have your levels of 25-Hydroxy-Vitamin D measured (the storage form of the vitamin). According to the Vitamin D council, a blood level of 50-80 ng/ml (125-200 nmol/L) is your best bet for optimal health and disease prevention.