(female) I am 51 yrs. old. In the past 6 months I have lost 33 pounds in a healthy slow pace. In the last 3 months I have had alot of hair loss along with scalp itching. It has clogged my bath drain in 3 months and feels about 1/2 the thickness it use to. The weight loss, a new shampoo and conditioner and having my hair streaked with blond every month ( I have had it colored for years and streaked but only every 3 months rather than streaked every month. These are the only 3 new things that have happened. I have started taking sea kelp with no help for 2 months. I have had all the normal medical tests done to make sure there isn’t any health issue here. The results were all normal.
Weight loss can cause hair loss although the slow weight loss you had should not be a cause. You could perhaps have an allergy to something in your new shampoo or conditioner, or even a reaction to the chemicals used with your hair coloring. It’s difficult to tell for sure, so I’m just left to guess. Sea kelp probably has little value to you for regrowing your hair.