I have been losing my hair since my teens, and that's about 20 years ago. Instead of doing one remedy, you really need a 4 step synergistic approach. For reference, I am 36, have a great head of hair, normal to oily skin and scalp. Here is the synergistic combination that worked for me. No one thing is going to work for you 100%, you have to use a combination to fight all the toxins you are facing daily.
I call this the 4 step FILTER - DHT - GROW - MASSAGE method.
1.) First you need to get rid of toxins that's inhibiting your hair follicles and hair growth. Surprise...where does that come from? Your daily shower water. Chlorine and lead pipes both kills follicles. I lived in a place with lead pipes and my hair loss went 50% worse. Once I moved out, and installed a shower filter that gets rid of chlorine (plus some other substances), my hair loss significantly decreased. I bet a whole house system that gets rid of fluoride would be even better, but I can't afford that, so a shower filter does the job.
2.) The second step is killing the DHT hormone on your scalp and your body. DHT is the primary hormone responsible for hair shredding. You do this by supplementing with Saw Palmetto Extract. This is a naturally safe method. The one side effect is that it makes you gain 5 lbs. So you need to clean up your diet and exercise routine to make up for that, in order to look the same weight. If I ever get off the Saw Palmetto, my hair loss increases. Once I get on again, it remains stable.
3.) Next you need to focus on growth. To do so, you need a high quality hair supplement. Do your research there, there are tons on the market. Make sure it has Biotin, Vitamin C, Magnesium, Silica, etc. Your body needs all the help it can get to regrow hair.
4.) The fourth step is primary for oily scalps. Although it may also help a dry scalp with a different solution. The reason you need to brush your scalp is because for most women, shampoo isn't helping your scalp. You are just washing hair strands. Its your scalp that needs help. I make a solution of caster oil, a bit of alcohol and some castile soap in one of those tooth shaped plastic bottles used for dying hair (you can get them at a beauty supply store). Apply the solution into my scalp, then brush my scalp with a medium to hard hair brush. Preferably one with hard, pointy plastic bristles, the real hair bristles wont get to your scalp. Important you are cleaning and exfoliating your scalp. There will be a lot of oily substances on the hair brush and you. What comes out of it is a cleaner scalp with less oil, allowing hair to grow stronger. I do this for about 15 - 20 minutes, sometimes, 30 minutes. Do this massage once a week to keep your scalp in optimum condition.
If you apply the synergistic approach of Filter - DHT - Grow - Massage, your hair loss will significantly decrease. This approach was much better than any rogaine or prescription product I have ever found. I am still doing it 10 years later.