Taste Changes & Loss of Smell
Chemotherapy, radiation to the head/neck, and zinc deficiency from poor intake all damage taste buds and olfactory receptors. Food may taste metallic, bitter, bland, or like cardboard. Loss of smell removes most of what we perceive as 'taste'. This severely impacts appetite and nutrition. Most taste changes resolve within 3–6 months after treatment ends.
Herbs & Supplements — Safety Information
Herbal information is for educational purposes. Many herbs interact with chemotherapy and other medications — consult your oncologist before use.
When to Seek Medical Help Immediately
- •Complete loss of taste or smell persisting more than 3 months post-treatment
- •Taste changes causing inability to eat at all
- •Metallic taste with other symptoms (fever, mouth sores — may indicate infection)
3 Natural Remedies
Zinc Supplementation
Best for: Metallic taste, blunted taste, slow taste recovery after chemo
Zinc is essential for taste bud cell renewal and olfactory receptor function. Zinc deficiency is extremely common in cancer patients due to poor intake and chemo-induced malabsorption. Multiple clinical trials show zinc supplementation (30–45 mg/day) significantly improves taste acuity and speeds taste recovery in chemo patients.
🧪 How to Prepare
Zinc picolinate or zinc gluconate supplements, 30 mg daily with food. Can also increase dietary zinc: oysters, red meat, pumpkin seeds, hemp seeds, lentils.
⏰ When to Take
With food to reduce nausea. Take consistently — taste improvement takes 4–6 weeks.
Flavour Enhancing Strategies
Best for: Metallic taste, food aversion, taste changes from platinum-based chemo
Adapting food preparation to work around altered taste pathways allows patients to eat adequately even with significant taste disruption. Acidic, umami-rich, and aromatic foods stimulate multiple taste receptors simultaneously and can override metallic or flat taste perception.
🧪 How to Prepare
Use plastic utensils instead of metal (reduces metallic taste). Marinate meats in citrus, vinegar, or soy sauce. Add umami: parmesan, miso, nutritional yeast, mushrooms. Use more herbs and spices. Serve food at room temperature or cold (hot food intensifies metallic smells). Rinse mouth with a baking soda + salt water solution before meals to clear residual metallic taste.
⏰ When to Take
Before and during meals.
Smell Training
Best for: Loss of smell from chemo or radiation to head/neck
Smell training (olfactory training) involves daily exposure to strong, familiar scents to stimulate olfactory nerve regeneration. Originally developed for post-viral smell loss (including COVID-19), it is now used for chemo-induced anosmia/hyposmia. Requires consistent daily practice over 3–4 months.
🧪 How to Prepare
Choose 4 strong, distinct scents: e.g., rose, lemon, clove, eucalyptus (or use essential oils). Twice daily, hold each scent 5cm from nose for 20 seconds while concentrating and remembering the smell. Keep a diary of progress. Change the scent set every 3 months if little improvement.
⏰ When to Take
Morning and evening, every day for at least 12 weeks.
Evidence Level Guide