Trying out "The key to the fountain of youth"

Call me gullible but I received a marketing email the other day from Biovea, from whom I usually buy my Melantonin.
It was pushing a supplement called Hyaluronic Acid, not be be confused with Hydrochloric Acid, which is something very different...
Anyway, this Hyaluronic Acid is apparently also known as the 'Key to the fountain of youth'. Hmm, I thought, I could use a bit of that.
I read the blurb. Apparently in a Japanese village where people usually live a long time and often have perfect skin into their 80's or even into their 90's their diet is rich in a starchy vegetable which is particularly high in HA. A pharmaceutical company in Japan began R&D on a pill supplement containing HA. When they tested the pills on one thousand individuals, around half of them reported smoother skin and even improved eyesight.
Okey dokey, I thought, tell me more....Hyaluronic Acid is plentiful in our bodies when we are born, but its levels gradually recede over time, which may be a big part of the ageing process. Hyaluronic Acid occurs in the deeper layers of our skin known as the dermis and it appears to help keep the skin smooth because of its water retention qualities. It's claimed that HA appears to help maintain collagen levels.
Furthermore, the blurb went on, HA makes up about eighty percent of the human eye and is, apparently, a sort of shock absorber to the retina, which helps to prevent trauma to the eye.
That clinched it for me as I have a rare retinal disease called Punctate Inner Choroidopathy which leads to scarring on the retina and some loss of vision. Great skin and better eyesight? AND it's on sale?
But before I hit the order button, I looked it up on the internet. It's approved by the FDA and is used in other forms injected into arthritic joints and as a dermal filler. I couldn't find anything particularly bad about it, so I decided to give it a try.
Well, mine arrived this week and I have been taking it religiously. I shall update you on whether I am appearing so youthful that people are mistaking me for my sons' older sister.
If your interest is piqued, I got mine from here.
PS, I have no connection with Biovea, other than as a long-time customer.