What is Metabolic Bone Disease (MBD) in iguanas?

MBD is a condition where bones soften due to calcium deficiency, vitamin D3 deficiency, or insufficient UVB exposure. In calcium-deficient iguanas, the body draws calcium from bones to maintain heart and muscle function — causing bones to become brittle, deformed, and prone to fractures. MBD is the most common disease in pet iguanas in Indonesia.

What is the ideal enclosure temperature for an iguana?

Iguanas need a temperature gradient: basking spot 38–42°C, cool area 26–29°C, and a minimum nighttime temperature of 22–24°C. Temperatures that are too low dramatically slow the iguana's metabolism and digestion — causing appetite loss, constipation, and opportunistic infections. Without the right temperature, an iguana cannot digest food even if it wants to eat.

What foods should not be given to iguanas?

Avoid: animal protein (meat, insects, eggs) — iguanas are obligate herbivores and their kidneys are not designed to process animal protein. Also avoid spinach and beets (high oxalate, binds calcium), excessive broccoli (goitrogens), and too much sweet fruit. Best diet: 70% dark leafy greens (kale, mustard greens, endive), 20% other vegetables, 10% fruit.

Iguana Not Eating: Causes, MBD, and the Correct Treatment Approach

An iguana that suddenly refuses to eat is one of the most common complaints from reptile owners. Unlike dogs or cats, iguanas are extremely sensitive to environmental conditions — and the causes of "not eating" can vary widely.

First Checklist: Inspect the Enclosure Environment

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Before panicking, check these things first — because 60% of iguana appetite loss cases are caused by environmental issues:

Parameter	Ideal	Problem Sign
Basking spot	38–42°C	<35°C → appetite loss
Cool area	26–29°C	>32°C → stress
UVB lamp	10–12 hrs/day	No UVB → MBD within months
Humidity	60–80%	<40% → dehydration