Can Bearded Dragons Eat Red Onion?

 

Red onions are also called purple onions and are cultivars of the onion with purplish red skin and white flesh which is tinged with red.

They are medium to large in size and have a sweet and mild flavor.

So can bearded dragons eat red onion at all?

Lets take a look at their nutritional data and find out more.

In particular, their acidic, calcium, phosphorus, water, protein, fat, sugar, and fibre content is of most interest when it comes to bearded dragons.

Their calcium:phosphorus ratio should be between 1:1 and 2:1 as the food the calcium content should be equal or more to the phosphorus content in the food, in order to be suitable for a bearded dragon.

Nutritional value per 100 g (3.5 oz)
Energy 166 kJ (40 kcal)
Carbohydrates
9.34 g
Sugars 4.24 g
Dietary fiber 1.7 g
Fat
0.1 g
Protein
1.1 g
Vitamins
Thiamine (B1) (4%) 0.046 mg
Riboflavin (B2) (2%) 0.027 mg
Niacin (B3) (1%) 0.116 mg
Pantothenic acid (B5)
(2%) 0.123 mg
Vitamin B6 (9%) 0.12 mg
Folate (B9) (5%) 19 μg
Vitamin C (9%) 7.4 mg
Minerals
Calcium (2%) 23 mg
Iron (2%) 0.21 mg
Magnesium (3%) 10 mg
Manganese (6%) 0.129 mg
Phosphorus (4%) 29 mg
Potassium (3%) 146 mg
Zinc (2%) 0.17 mg
Other constituents
Water 89.11 g
Fluoride 1.1 µg

source wikipedia

Unfortunately, bearded dragons cannot eat red onions at all.

This is for the following reasons;

  1. As you can see Red onions are quite acidic for bearded dragons.
  2. Their calcium:phosphorus ratio is 1:1.26 which is not good at all for them.

Because of this red onion is definitely a food they should not be eating, even to have a nibble on. It will harm them if it is eaten.