well if you were on a diet and then lost weight there is a good chance of hair fall. Would suggest you to make few life style modification
before going to treatment consider these food changes
Healthy Hair - DOS AND DO not’S
DO gently pat freshly washed hair with a microfiber towel (or, if in a pinch, a paper towel) to absorb moisture. Because it minimises breakage, this is the best method for drying thinning hair before styling it.
DO treat thinning hair with gentle care, and avoid over-brushing, washing, and processing, all of which can further damage already fragile strands.
DO buy yourself a quality wide-tooth comb if you have curly or wavy hair, or a brush with soft, rounded bristle tips for straight hair, and make these your new grooming go-to’s to prevent further disruption of thinning hair.
DO toss out any fine-tooth combs and brushes with sharp bristles. These tools can increase breakage in hair that needs extra TLC.
DO treat your hair to new heights by indulging in a nourishing bedtime hair-care routine. Tenderly comb out breakage-causing tangles and gently gather your mane into a low, loose bun, braid, or ponytail before nodding off to sleep.
DO massage your scalp using the pads of your fingers before hopping in the shower. Beyond just feeling amazing, this increases blood flow and helps exfoliate pores for a healthier scalp.
DO detangle your locks before you shower, as dry hair is more durable and less apt to break than wet. Just remember to use a wide-tooth comb for curly or wavy hair, or a brush with soft, rounded bristle tips for straight hair.
DO wash your hair only when it is dirty, but know that thinner hair generally gets grimier faster than thicker hair. If you can, shampoo every other day to diminish damage from over washing. To stretch the time between washes, try a dry shampoo with cornstarch or rice starch and a clear formulation.
DO protect your hair from damage by limiting direct sun exposure. Natural sunlight, and even artificial ultraviolet light, can break down keratin protein in your hair and hamper its elasticity- definitely undesirable outcomes for already-thin hair. Thinning hair is like a cashmere sweater - it needs and deserves to be coddled and specially cared for. Certain hair-care shampoos and conditioners now contain sunscreen. Ask your dermatologist if these may be right for you.
DON'T make the turban towel-wrap a part of your post-shower beauty routine. Instead, you do want to allow your hair time to air dry a bit before styling. A towel wrap requires twisting, turning, and pulling on your mane, which can lead to nasty hair breakage - not ideal for more delicate hair types.
DON'T gather your thinning hair into tight hair bands, wrap hair bands around your head, or pull hair firmly into clips. When you have thin hair, “loose” is the key word. If you do use a hair band, look for a hair tie that is no-tug and glides easily. Or use a ribbon.
DON'T over-condition thinning hair, which can weigh it down and flatten it. Apply conditioner only to the bottom two-thirds of your hair strands, or choose a lightweight conditioner, such as a mist formulation.
DON'T sleep on a pillowcase made out of a rough fabric. Replace cotton cases with silky-smooth ones to reduce friction from overnight tossing and turning that can lead to tangles and breakage.
DON'T forget to turn down the shower water temperature. Some hair professionals maintain that a final rinse with cool water may close up cuticles and cause hair to swell slightly, making it appear thicker.
DON'T let too much time pass between haircuts. Split ends can inch up your mane, making tresses look even thinner and strands sparser. Aim to trim at least one-half inch off every 6 weeks.
DON'T sleep on a wet head. Fine hair just doesn't bounce back the same way thicker hair does
DON'T pull, tug, or yank at roots when brushing a wispy head of hair. This is a surefire way to deplete hairs and, hey, there are smarter ways to cool aggressions (yoga, anyone?).
FOOD AND SOURCES
Biotin is a water-soluble B vitamin. Too little biotin can cause brittle hair and may lead to hair loss. SOURCE- wholegrains, liver, egg yolk, soy flour and yeast.
As hair is made of protein, ensuring you have enough protein in your diet for making hair strong and healthy. If not consuming enough protein in your diet, your hair is likely to become dry, brittle and weak. Extremely low protein diets may result in hair loss.
SOURCES- chicken, turkey, fish, dairy products and eggs as excellent sources of protein along with vegetarian sources such as legumes and nuts.
The sun can damage our hair just like it can damage our skin so ensure you eat foods rich in vitamin E to provide protection for your hair. SOURCE -Nuts are nutritional powerhouses, providing zinc and selenium as well as vitamin E so try to include them as part of a balanced diet.
Zinc and selenium
Scalp protection involves other important minerals, notably zinc and selenium. A lack of zinc can lead to hair loss and a dry, flaky scalp. SOURCE- Fortified cereals and wholegrains are a good source of zinc along with oysters, beef and eggs.
Vitamin A is needed by the body to make sebum. Sebum is an oily substance created by our hairs sebaceous glands and provides a natural conditioner for a healthy scalp. Without sebum we may experience an itchy scalp and dry hair.
SOURCE- Animal products and orange/yellow coloured vegetables which are high in beta-carotene (which makes vitamin A) such as carrots, pumpkins and sweet potatoes.
Iron is an especially important mineral for hair and too little iron (anaemia) is a major cause of hair loss. The hair follicle and root are fed by a nutrient rich blood supply. SOURCE- Animal products such as red meat, chicken and fish Vegetarians - lentils, spinach and other leafy green vegetables such as broccoli, kale and salad greens.
Vitamin C aids the absorption of iron so foods high in vitamin C are good to eat in conjunction with iron-rich foods. Vitamin C is also an antioxidant so is used readily by the body. SOURCE- blackcurrants, blueberries, broccoli, guava, kiwi fruits, oranges, papaya, strawberries and sweet potatoes.