For starters, I noticed my hair was thinning at 20. . . Yeah, talk about horrifying. Since it's impossible (in this day and age) to go bald and have a decent social life from 20-30, I went into a frenzy and did what I do best - research! Long story short, I have bought 3 bottles so far over the course of A YEAR and it has worked wonderfully. Albeit, I caught my hairloss right when it was becoming barely-noticable. So obviously the stage of your balding will have a huge effect on whether this works or not. For the record, I got my hair buzzed down with a 4 and I use this stuff every day. If you're a guy, you should buzz your head down to a 2~5. Your thinning hair is less noticable if you buzz your head down, and it will also allow Revitra to reach your scalp easier. This is, of course, assuming you caught your thinning hair early in the game (not age wise, but stage wise).
If you wanna read on, prepare yourself! Albeit, it might be easier to read the rest of this if you're interested in other ways and the pros/cons of the other ways.
There are many hairloss solutions out there, but how many actually work? For those stressing out over thinning hair, I'll help you out. Out of all the junk out there, topical products with Minoxidil or Ketoconazole are the most effective - in that order. Finderstine - the generic "hair growth pill", is also effective. So what're you going to try first? I recommend this, since it is the safest, easiest, and cheapest solution.
Note: All hairloss treatments will make the "dying hairs" fall out/shed. So basically, if you begin to shed - congratulations, it's working. Stopping any hairloss treatment means you will lose ALL your regrown hairs. Unless, of course, you got a hair transplant/hair plugs/etc. Also, all these work way better for women then it does men. Mostly because life is unfair! Just kidding, mostly due to hormonal reasons. DHT - a supposed form of testosterone is POSSIBLY the cause, which women don't really need from the start/have much of.
Minoxidil: To your body, it's a toxin. As such, your body WILL build up a tolerance to it later on in life as you continue to use it. Chances are, your hair will grow back, but you will stop gaining hair and just keep whatever you grown. So basically, start using Minoxidil as soon as you KNOW you're losing your hair if you're a man. Will it work for everyone? No. But it will work for most. Side effects may include an itchy scalp or greasy hair if the product's quality is cruddy, but the former side effect only applies to those with messed up scalps. Also, if you AREN'T going bald due to genetics (but from a disease or hormone levels gone crazy), then this stuff will mess you up if you used it for a while.
Ketoconazole: It's found in Revitra! It works faster than Minoxidil does, but sadly, doesn't work as well. If you use it at the first sign of hairloss, again, your chances to have a decent baseline is way better. Ketoconazole has a wonderful "cosmetic effect". Your hair will become thicker after use, and will slowly grow in diameter to cover more area up to a certain point. In addition to that, it will stimulate your thinning hair to become "healthy" again. Also, the shampoo will make your scalp hella healthy. If you have dandruff, this stuff will work wonders for you as well. Unlike Minoxidil, your hair won't get messed up from using it if you're not actually going "naturally" bald. If your hairloss is on the uglier side of things, combine Revitra with any Minoxidil topical. Use this first to be on the safe side.
Finderstine: Basically, this will lower DHT levels. The only problem is, DHT's function is to help MAINTAIN masculine attributes. . . In addition, your estrogen levels *may* rise. It takes your body half a year to adjust to the medication (only 1-3 months for results). It will take your body a year to adjust after you stop the treatment, and even then, it may not go fully back to normal. Toying with your hormones is no joke, nor do I think it's worth it just for the sake of having hair on your head. The upside is that you won't have to worry about prostate cancer, the downside is. . . Um, the hormonal change. Also, other possible side effects include (due to high estrogen/low testosterone): gaining fat easily, hard time building muscle, mood swings, erectile dysfunction. Erectile dysfunction is usually reversible, but in some rare cases, it is permanent. Again, playing with your hormones is no freaking joke.
Other tips:
1) Being healthy means your hair stays on your head longer. That's why hairloss strikes the younger folks more so than it did a decade ago.
2) Biotin, protein, and calcium is your friend! As are all other vitamins/nutritients. Zinc (15mg at least) is also necessary. . . However, Zinc should be take 1-2 hours after ingesting calcium since your body is stupid and would rather ignore out Zinc just so it can absorb more calcium. Taking zinc before bed is best.
3) Work on other things, such as muscle tone or whatever you can do to make yourself feel better about your appearance. Also, ladies(or guys if you swing that way) don't care if you're bald if you have a body like Arnold Schwarzenegger used to have(over exaggerating, but you get the idea).
4) If you're ridiculously bald, just shave your head. Nothing looks more ridiculous than having a crow's nest on your head or a really bad come-over. Seriously.