Hair Breakage . . .

To start with, unless you have very oily hair, don't wash it everyday. Every 2-3 days is fine, use a dry shampoo the other days. Your hair is at it's weakest when it is wet and you are over washing it.
I use suave professional for my hair, plus a dry oil. Also keep you hair trimmed, split ends will continue to split up the shaft until cut off.
In addition to the other issues you mentioned, a change in diet can adversely affect your hair.

When it seemed like I was losing a lot of hair, my stylist said not to pull it up or back, wash less frequently, use wide tooth condos and only natural bristle brushes.

1- when you wash your hair, don't scrub in circles. Just "rake" straight back, over and over. Only wash the scalp~ the rest of our hair does not need shampoo.

2- speaking of shampoo, it is really bad about drying up your hair, which leads to breakage. So unless you are able to spend a lot on it, try to cut back on using it. I have "weaned" my hair to the point that I only have to shampoo once a week (washing with plain water the rest of the time, and conditioning every time I shower.) before it starts to look greasy.

3- I make a mask for my hair once a week (on shampoo days.) I mash an avacado with an egg and some olive oil. I slather it on, wrap my hair in a hot towel, and watch a show. (About 20-30 minutes.) then I wash my hair, and condition as usual.

4- use a t-shirt instead of a towel to dry your hair.

5- get a silk or satin pillowcase, or wrap your hair before bed.

6- take a biotin supplement. (Supports healthy skin and nails.)

I have extremely dry, brittle hair that is very prone to breakage. I have discovered these things over the years, and it makes a difference.

I began taking a multi-vitamin a year and a half ago and have noticed that it does help with hair growth. My hair has grown faster in the past year and really seems even thicker. My vitamin d levels were low so I began taking a supplement for that as well with great benefit- more energy, all my morning aches went away and my levels returned to normal. The key is you need to take it with "fat" like a piece of cheese in order for the body to absorb it. It could be your thyroid levels are off, however thyroid medication can cause temporary hair loss as a side effect for some.

I try to get my long hair cut every 8 weeks. I notice that by 7 weeks my hair will really appear to shed a lot, getting a trim seems to stop that and just make my hair feel healthier overall.

Besides the medical intervention, definitely get your hair cut more often. The frizzy comes from the hairs splitting all the way up the shaft. More frequent trims prevent split ends and keep your hair from frizzing. Also, the quality of cut makes a huge difference. The dull, crappy shears from a chain store do not compare to the quality tools a professional stylist uses. These are the things my hair stylist has taught me and I absolutely see a difference. Find a great, professional stylist and let them guide you!

My hair is fine since I stopped damaging it.
I stopped using commercial hair dye (it was frying my hair) and switched to henna - I have no more split ends since I did that.
I stopped using anything that heated my hair - no curling irons or straighteners - and I only use a blow dryer if I can use it cold.
Usually I just let it air dry.
I don't pull my hair into tight styles - tight braids or pony tails can damage hair roots.
I wash it every other day and rinse it with vinegar - makes it very shiny.
I take my thyroid medication every day (I'm hypothyroid).

My daughter has naturally wavy hair that breaks VERY easily and my hairdresser said that she needs to use a sulfate-free or at least low-sulfate shampoo. You can get them fairly cheap - the one we are using now is treseme and it has already made a huge difference!

I don't have that problem but if I did...

My first step would be to have a complete blood work up before I started any type of supplements. It could be something simple.

I do take biotin, b-12 and D all fairly high doses per my Dr. I take the kind that melts under your tongue because my body doesn't absorb pills.

Never wear ponytails all the time or clip your hair on the same spot day after day. That will lead to breakage.

Coconut and argon oils are great conditioners. I will leave a light coat on the night before I shampoo.

Don't shampoo daily. Utilize the dry shampoos for the day off. When you do style, use heat protectant.

I have long straight hair. When it's wet, I use a leave in conditioner and use a wide toothed comb to comb through it.

I use salon microfiber towels from Sally Beauty supply for initial drying, never rubbing. I don't style so I let mine air dry until it's most done then I use the cool setting on the dryer. My hair is straight as a board, dries that way and will not curl at all.

I sleep on satin pillowcases.

I do get my hair colored at the salon about once every 8-12 weeks, depending on my choice. I don't really have gray to cover, I just don't want to cut my hair so I let my stylist use me as model for color, extensions, new products.

Best wishes to you

First of all, it's fine to ask questions like this on this site. They don't all have to be kid-related.

I had the same problem - lots of hair loss but also thinning and breakage. It wouldn't take a perm or color for years, it grew unevenly, and there was such a huge amount in the shower drain. I had some of those health issues including thyroid deficiency and menstrual & perimenopausal problems. Even with thyroid medication taken for years, on top of vitamins and supplements (big brand and also high-end stuff from the chiropractor), the hair loss didn't stop (in fact, it was worse).

I think if you can get some blood work to rule out things like a thyroid issue, that's good. My experience in this issue is that basic store-bought supplements, particularly if they are a single nutrient (such as Vitamin D) have little or no value. They simply aren't absorbed well, particularly in pill form, and they don't work by themselves anyway. Every vitamin, mineral, trace element etc. needs many other "partners" to function effectively. So the only people who benefit from all those bottles of pills are the people who sell them!

From my work with hairdressers, I can tell you there are some products that can help with dryness and conditioning, but what you are describing starts from inside the body. So nothing you apply to the hair after the fact is going to strengthen a hair shaft that's deficient. It's the same principle as applying skin creams or treatments for various topical problems (eczema, dryness, hives, acne, whatever) when the problem starts inside the body. You have to get to the cause which is some sort of imbalance.

I found that all my problems went away when I used cellular nutrition and got comprehensive nutrients into the individual cells. In all my training in this area, I've learned why it works. So now my hair is full and healthy, takes a color well, grows faster, falls out hardly at all (I rarely have to clean my brush or the shower drain), and I'm able to wear it long for the first time in many years. My hairdresser says she's never seen it so thick. I have fine hair (not coarse) and always have, but there is a lot of it. The side benefit is that I have gotten rid of other physical problems (allergies, for example) and I never ever get sick anymore. So nourishing the whole body in a systemic way is what food science is showing us all is a better way. It worked for me.

My husband also has a full head of hair. His is coarser hair, and always has been, but his is really full and healthy as well. All the guys who are losing their hair are pretty jealous of him!