A lower than normal thyroglobulin may indicate hypothyroidism, and the impact on health needs to be assessed in conjunction with thyroid function, imaging and other tests. Thyroglobulin is a precursor protein for thyroid hormone synthesis. If thyroglobulin is lower than normal, it may lead to lower levels of thyroid hormones and consequently hypothyroidism. Hypothyroidism is mainly characterized by low metabolic symptoms, such as pallor, indifference, dryness of the skin all over the body, memory loss, bradycardia, muscle weakness, decreased libido, etc. If hypothyroidism occurs at a young age, it can lead to short stature and mental retardation. If thyroglobulin is lower than normal value, you should consult the doctor in time, improve the relevant examination and take treatment under the doctor’s guidance.