Galactose

Galactose structural formula overlayed on milk being poured

Galactose structural formula

Galactose is a form of sugar that is formed by the break down of lactose, the main sugar in milk.

The normal level on a blood test is less than 1.0 mmol/L.

A high level may be an indication of galactosaemia (an inherited disturbance of the breakdown of the sugar galactose in milk to cause vomiting, failure to thrive, liver disease and eye cataracts), or galactose-1-phospahte deficiency  (inherited lack of a liver enzyme).

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