Question

People with dry hair and scalp should avoid

Over-washing your hair and using shampoos too often can strip the natural oils from your scalp and hair. This is the primary cause of dry hair scalp.
An allergic reaction to certain products might cause your scalp to dry out and lose its protective layer.
Extreme weather changes can also disrupt your oil production, with cold weather being the commonly observed reason.
Heat treatment through blow-dryers and straighteners can increase the temperature on your scalp and dry it out.
Hormonal changes, including during moments of stress, can disrupt your oil production.
Colouring your hair or certain chemical treatments can dehydrate your scalp.
Having a poor diet with inadequate nutrients can also contribute to your dry scalp.:

Answer 1

To prevent dry hair and scalp, one should avoid over-washing with harsh shampoos, use gentle or condition-specific shampoos, minimize heat styling, protect hair from extreme weather, manage stress, and ensure a diet rich in proteins and vitamins.

Step-by-step explanation:

Individuals with dry hair and scalp should avoid harsh treatments and environmental factors that contribute to dehydration and irritation. Overwashing with shampoos, especially those containing heavy-duty surfactants like sodium lauryl sulfate, can strip away natural oils (sebum) that protect hair and scalp. Using specialty shampoos designed for gentle cleansing or for specific conditions like dandruff can help maintain the balance of moisture. Furthermore, reducing the use of heat-styling tools, protecting hair from extreme weather, managing stress to avert hormonal imbalance, and consuming a protein-rich diet are crucial steps to prevent dryness and the associated conditions such as gingivitis and scurvy that come from nutrient deficiencies.

A nutritious diet supports overall health, including the condition of one's hair. Proteins are essential; without adequate protein intake, the body prioritizes vital functions, leading to weaker hair and potential hair loss. Vitamins are also essential, with a deficiency in Vitamin C causing symptoms like dry hair and skin, among others, potentially leading to scurvy. Proper hygiene without over-washing, combined with a thoughtful selection of personal care products and a balanced diet, can significantly improve and maintain scalp and hair health.