The throat chakra governs the thyroid gland which forms the basic metabolic rate. The element is Ether (original substance of the universe, the void space where time and space allowed the presence of matter). It is closely related to our mind and spirit, the seed of all beings.
The power of the throat chakra is our tongue, for our tongue to be the same as the tongue of God, as stated by Dr Gurucharan. It means, speak the truth in our mind and words. Otherwise it will weaken our fifth chakra (such as gossip, slanders, judgement, self denial and even negative self talk), and may results in hyper or hypothyroidism.
Meditation , mindfulness practices let us be more aware of what we say and what we put in our minds, reinforces us to stay true always. Besides, cleansing technique (jala Neti) , inversion poses such as shoulder stand is also good for thyroid gland.