A friend felt cold easily and sweat for no reason. She asked me what should she eat to better her health. What is lacking in her diet that is why her immune system is low?
Frankly, the first question one should ask is not "what else to add" to your diet but what have you been putting wrongly into your mouth, slowly poisoning your body.
The father of Western medicine Hippocrates said, "First do no harm."
As a health coach, my first job is to detect where the poisoning come from. Whether it is from the environment, food or mental. These could cause blockages in the body, impairing absorption of nutrients. Hence no matter what nutritious food or supplements you take, you don't seem to benefit from them. And you wonder why you have seen western doctor, TCM Chinese physician, nutritionist and tried all kinds of "magic pills" but you are still not feeling well. Medicine can only control the condition. Healing needs you to stop damaging your body and mind.
So, if you are not having the best of health now, slow down, check what have you allowed into your mouth, your mind and your environment. Detox is not just for the body alone. Declutter your environment, unfriend those poisonous negative people on social media, stay away from wrong foods and keep yourself and environment clean. These are the first things you should do.
Eliminate negative to allow positive vibes flow again.