LDN does not traditionally cause hair loss. If you are suffering with hair loss, it is more likely to be due to nutritional deficiencies and the presence of toxicity in the body in the form of high levels of metals, chemicals or biotoxins. It would be sensible to consult with an integrative physician. Hair loss can also be associated with hormonal deficiencies and thyroid deficiency in particular. If you suffer from this symptom when on LDN, speak to your physician about it; as it might possibly relate to a healing reaction.