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Vitamin D plays an important role in calcium homeostasis and metabolism. Vitamin D3 and vitamin D2 are two forms of vitamin D in human body, both of which only a few foods contain. The deficiency of vitamin D in human body can cause a threat of diseases such as osteomalacia, rickets and diabetes. 25-OH Vitamin D2 and 25-OH Vitamin D3 as vitamin D metabolites are measured in human serum to evaluate vitamin D level. Vitamin D supplements are considered as an effective way to treat or to prevent the diseases.

25-Pin RS 232 Kit

25-Place Microscope Slide Box, ABS, Blue

25-Place Microscope Slide Box, ABS, White

250 mL (8 oz.) Nalgene Sterile Disposable PETG Flask Plain Bottom

250 mL (8 oz.) Nalgene Sterile Disposable PETG Flask Plain Bottom

250 mL 19/38 STJ Complete Lyph-Lock Flask

250 mL 24/40 STJ Complete Lyph-Lock Flask

250 mL Flask Clamp, Compatible with 105008 (CO2-Resistant Shaker)

250 mL Lyph-Lock Flask Bottom

250 mL Measuring Cylinder, Double Scale To Deliver, Class A, Individually Certified

250 mL PFA Round Bottom Flask, 29/32 mm Neck

250 mL Plastic Clamp for LSE Benchtop Shaking Incubator

250 mL Square Media Bottle Clamp for Solaris Shaker Platforms

250 to 480 mm Filling Tube, telescoping, Dispensette S 1, 2, 5 and 10 mL (all models)

250 uL Finnpipette F2 Fixed Volume Pipets

250 uL Finntip Universal Pipet Tip Refill Kit, 0.5 to 250 uL, 5.2 cm, Yellow, 20 x 96/Refill, Non-sterile

250 uL Finntip Universal Pipet Tip Refill Starter Kit, 0.5 to 250 uL, 5.2 cm, Yellow, 4 x 96/Rack + 10 x 96/Refill, Non-sterile

250 uL Gastight Syringe Model 1825 N, Cemented Needle, 22s gauge, 2 in, point style 2

250 uL Microliter Syringe Model 825 RN, Small Removable Needle, 22s gauge, 2 in, point style 2

250 uL Seal Kit Replacement Part for SoftGrip Pipettes

250 uL, C-Line Model 1725 FN CTC Syringe (7.9 mm), Fixed Needle, 22 gauge, 51 mm, point style 3

250 uL, Model 1705 Terasaki Dispenser

250 uL, Model 1725 LT Syringe, Needle Sold Separately

250 uL, Model 1725 RN Syringe,Large Removable Needle, 22 gauge, 2 in, point style 3

250 uL, Model 1725 TLL-SAL SYR, Instrument Syringe

250 uL, Model 725 LT Syringe, Needle Sold Separately

250 uL, Model 725 N Syringe, Cemented Needle, 22 gauge, 2 in, point style 3

250 uL, Model 725 N Syringe, Cemented Needle, 22 gauge, 2 in, point style 5

250 uL, Model 725 N Syringe, Cemented Needle, 22s gauge, 2 in, point style 2

250 uL, Model 725 RN Syringe, Large Removable Needle, 22s gauge, 2 in, point style 2

254nm UV Replacement Bulb, Clear

25GA,SST TUBE,NO POINT PER IN

25mm stainless steel grinding ball, each