Ms Pauline Chan, a dietitian and the managing director of The Nutrition Place, said the colour of the egg yolk is dependent on the hen's feed.
A diet of wheat and white corn meal would produce an almost colourless yolk. If the hen is fed a diet that includes yellow corn meal, marigolds or carotene, the egg yolk would have a deep yellow colour, she said.
2: Are brown eggs better than white eggs or vice versa?
Ms June Liew, a dietitian at the department of dietetics and nutrition services at Singapore General Hospital, said brown eggs are produced by hens with red ear lobes and feathers while white eggs are produced by hens with white ear lobes and feathers. There is no significant link between shell colour and the nutritional value of an egg.
3: Can eggs be used for facials or hair masks?
Egg whites can be used for facials and can be applied directly on the face or together with other ingredients.
Ms Liew said that albumin in the egg is said to have a drying effect, thereby tightening pores and firming the skin.
She added that some people claim that eggs promote soft and healthy hair by nourishing the hair follicles with essential proteins, sulphur content and its wide array of vitamins and minerals. For these reasons, eggs are used to make shampoos and conditioners.
'But more scientific studies are needed to prove the efficacy of eggs on skin and hair health,' she said.
4: Are eggs good for children and why?
Ms Lydia Tan, a nutritionist at the youth health division of the Health Promotion Board, said eggs are a good source of choline, a nutrient essential for normal functioning of cells and brain development in infants. Eggs are also a good source of riboflavin, zinc and vitamin A, which are essential for growth and eye health.
5: When and how should a young child start eating eggs?
Ms Tan said egg allergy is more common in children under two years. Tolerance of eggs usually develops in children after that. The egg white, which is mainly protein, is the main source of allergens.
However, cooked egg yolks can be introduced to infants at six months.
Ms Chan cautioned: 'Whether or not you yourself have a history of egg allergy, the first time you introduce eggs to your young child, be sure to watch for signs of an allergic reaction such as rashes, asthma symptoms, swelling of the mouth or throat, vomiting or diarrhoea and loss of consciousness.'
