Metabolic Bone Disease (MBD)


  • Kinked/wavy tail
  • Depleted calcium sacs
  • Curved limbs
  • Appetite loss
  • Loss of coordination
  • Seizures
  • Lethargy


  • Calcium or vitamin D3 deficiency
  • Lack of exposure to UVB


A kinked or wavy tail and depleted calcium sacs are two surefire symptoms of MBD. You can check the gecko’s calcium sacs by looking at the underside of her throat — if you can see two white ovals there, her calcium sacs are fine. If they are very small or nonexistent, you have a problem.

UVB is not required for mourning geckos, but it does a good job at preventing and healing MBD. If you’re not using a UVB bulb, install a 2% or 5% UVB over the terrarium mesh. If you have a bulb, check to make sure it hasn’t expired (they expire and need replacement every 6 months).

Offering a dish of calcium powder with vitamin D3 and dusting feeder insects with the same also helps restore bone density and prevent future cases of MBD in your colony.

Other mourning gecko health topics: