Efficacy of oral moisturizing jelly on oral health and nutrition in post-radiotherapy head and neck cancer patients

Not recruiting All 70 Interventional Thailand Dietary Supplement: Oral moisturizing jelly;Other: Artificial saliva Changes in subjective dry mouth score compared to baseline Changes in objective dry mouth score compared to baseline;Changes in salivary pH compared to baseline;Changes in salivary buffering capacity compared to baseline;Changes in Candidal counts of saliva compared to baseline;Changes in energy intake compared to baseline;Changes in subjective swallow ability compared to baseline;Changes in appetite compared to baseline;Changes in tolerance to spicy food;Changes in umami taste recognition threshold compared to baseline