I have found the most common reasons for hair falling out in women is stress and nutrient deficiencies (i.e. Vit-D).
Stress: "Eats" up our B-vitamins and plays havoc on our bodies with the release of cortisol into our bloodstream. If stressed in daily life is common, practice deep breathing (from the belly, not chest). Take short walks, read, exercise or do what relaxes you. Recognize your stress triggers. Take a good B-Complex every day. I suggest women keep B-vitamins in their purse to take them when they have sugar, processed flours such as pasta or feel the tension mounting at home or even in traffic.
Nutrients: Review your diet. Raw veggies, fruits, nuts and whole grains followed by theses foods in a cooked state and limit your meats to chicken, fish and lean red.
If you are not on a whole food multi-vitamin and mineral, start there. I recommend most women take a calcium/magnesium supplement with vitamin D(3). Soda's are acidic and leach out our calcium which could be the reason for Osteoporosis numbers rising; Magnesium is excellent for hundreds of functions and 80% of us run short of it in our diet and 60% of Americans do not have enough vitamin D because when in the sun, we wear sunscreen.
You get the nutrients you need for your body and your hair will be lush and thick!!
The thyroid needs zinc. You can safely take up to 100mg per day. Diet and nutrition has repeatedly improved the thyroid function.
Keep in mind that research proves that even with a diet of 3000 calories per day, we are malnourished. The majority of our American foods are not nutrient dense. As early as 2003 Harvard Medical School published a Food Pyramid which recommends a daily multi-vitamin for most. -M.
After decades vitamin personal vitamin use with various brands but continued health decline and then much research, I highly recommend the company Shaklee for supplements and other natural products. You can find a rep at www.Shaklee.com or contact me. If you like to visit a nutritionist, I can recommend one. Blessings!