Oh, I don't actually take a multi-vitamin...I should correct my statement in that I don't think any of those things directly cause hair loss but it's possible that they could change the ph of the scalp and thereby perhaps facilitate over-runs of p. acnes and malassezia fur fur. If you take a multi-vitamin, it's highly doubtful that you are malnourished. Virtually everyone starts taking vitamins when they first notice hair loss. I did. Usually it is biotin and other B-vitamins that most of us already have enough of but vitamins won't hurt either and it's one fewer complicating factor to worry about.
I found an article about possible ph changes from changes in water density:
Apple Cider Vinegar (ACV) for Hair Loss: Separating Fact From Fiction
Apple cider vinegar (ACV) is one of the most popular home remedies for hair loss. But the evidence on ACV and hair growth is actually mixed. Here's why.perfecthairhealth.com
#2. ACV is mildly acidic
"Apple cider vinegar has a pH level of 2-3, which is considered mildly acidic. Interestingly, when it comes to acidity versus alkalinity, there’s evidence that parts of our skin actually favor an acidic environment for health. And in this regard, ACV might have some therapeutic benefit. Here’s how this might relate to our hair.
As a refresher, ceramides are the building blocks of our epidermis (i.e., the outermost layer of our skin). If our ability to produce ceramides is impaired, our skin barrier begins to break down. This leads to dermal dehydration, dandruff, inflammation, and a host of other problems that may partly contribute to hair loss.
Interestingly, studies show that the production of ceramides only occurs at an acidic pH (9). Thus, our epidermis must remain in a slightly acidic state for those tissues to produce ceramides and maintain skin barrier functionality.
On that note, a shift toward an alkaline environment seems to have negative impacts on our hair health. For instance, studies show that alkaline hair shafts are frizzier, more damaged, and more prone to breakage (11).
There are many factors that can create a more alkaline environment in our scalp skin. Two common culprits: (1) harsh surfactants in shampoos, and (2) mineral deposits in shower water.
We’ll dive into how surfactants and hard water can disrupt skin barrier health in a future article. For now, just know that acetic acid – or apple cider vinegar – might be useful in combatting a shift toward alkalinity. In doing so, its application might help promote the production of ceramides, restore skin barrier health, and thereby improve our hair.
Again, without a clinical study, we just don’t know."
Here is a second article related to the role of vitamins in hair loss:
Vitamin B12, Hair Loss, & Methylation: Does This Vitamin Improve Hair Growth?
Does vitamin B12 improve hair growth? Supplement companies say yes, but scientific studies reveal a much murkier (and nuanced) relationship between vitamin B12, hair loss, and hair growth... one you'll want to understand before you
...
Should I be? /shrug
It could be that once a b12 deficiency is found, that when it "falls back" to another b vitamin, or backup way of doing this methylation process, it basically "locks" that other vitamin into place, and not go back to b12. Which could explain non b12 deficiency but bald and b12 deficiency from birth control but not bald. It's possible perhaps?
There definitely needs to be more studies beyond one stint with rabbits. More funding and more studies that can potentially help mankind.
