On his website, Dr. Mehmet Oz recommends apple cider vinegar as a dandruff treatment. The acidity of apple cider vinegar changes the pH of your scalp, making it harder for yeast to grow. Mix 1/4 cup apple cider vinegar with 1/4 cup water in a spray bottle, and spritz on your scalp. Wrap your head in a towel and let sit for 15 minutes to an hour, then wash your hair as usual.
HCG levels are associated with problems of the thyroid and supplementing HCG hasn't been proved to be a safe treatment. HCG levels only have a weak effect on the thyroid gland and hypothyroidism and HCG levels don't have a strong connection in terms of weight loss. HCG supplements are probably broken down and digested.
Routine tests then will be unable to detect it. Thyroid panels are too limited. A more comprehensive test would include looking beyond TSH to total T3 and T4, free T3 and T4, Reverse T3, and antibody levels commonly found with Hashimoto's disease (the most common cause of low thyroid function).