I have used glucosamine sulfate and I have not noticed any increase in my IOP. Glucosamine keeps my joints moving freely. However, I stopped using glucosamine when I read the following report from Alternative Medicine Review (subscription required) by Kathleen A. Head, ND.
I was just reading an article here about the Ayurvedic herbal formula triphala. It's a good article.
The Ayurvedic text Charaka Samnita says that Triphala is,
"a rasayana for the eyes (netra ruja apaharini), and helps prevent eye diseases such as glaucoma and cataracts."
One of the three ingredients in Triphala is Amalaki. The article says,
"Amalaki is an excellent source of Vitamin C, and is the most concentrated and absorbable source of the vitamin in the plant kingdom."
That is incorrect. It is based on some very old and completely faulty research. The research actually counted a whole group of bioflavonoids as "Vitamin C," thereby grossly inflating the actual value.
The article then goes on to say,
I'm looking into Alpha-lipoic acid. I have used it in the past and I want to try it again, this time while closely monitoring my IOP. As part of my research, I just ran across "ALA helped to cure my glaucoma" at What Doctors Don't Tell You (Volume 15, Issue 5).
The article is based on Patricia Knox's story which I quote below:
This article is one of three I have written on the subject of Coleus Forskholii. The other two are:
Makandi (Coleus Forskholii) is one of the most broadly useful herbs of Ayurveda, but until recently it was not well-known in the West. So wide-ranging are its therapeutic applications that it has been called a pharmacopaea in a single plant.
We need vitamin A and the carotenoids for peak health of our visual system.
However, several large scale studies have shown that taking supplemental vitamin A or beta-carotene is not a good idea.
What does this mean for those of use with vision problems?
First, I think it is a mistake to single out beta-carotene or vitamin A as culprits. The same caution should apply to lutein, zeaxanthin, and possibly every other individual carotenoid we can name. Remember, it took a long time before we figured out that supplemental beta-carotene carried risks. Even though some studies are now showing that lutein by itself has benefits, we should not forget what we have learned from other research. It seems imprudent to take any one of these carotenoids in isolation. The same caveat applies to taking supplements (such as multivitamins or products formulated for vision) that contain several of these isolated carotenoids.