Can Glucosamine Sulfate cause constipation?

On 2008-1-13, from morning to afternoon, I could feel “something” just inside the anus, but we I tried to pass motion, nothing could come out.

Am I having constipation? Just look at the following records of my “performance”:

Legends: B = Big, S = Small, M = Medium, SM = Small to Medium, MB = Medium to Big, VS = Very Small, NIL = No bowel movement

Date	Dietary Fibre in g taken.	Bowel Movement	Water in Litre taken	Sleep Hr	Sleep Deficit, Hours
2008-01-01	37.72	1B, 1S, 1SM	2.00	6.33	1.63
2008-01-02	32.31	1MB	1.80	6.33	1.63
2008-01-03	33.81	1M	1.80	7.00	1.00
2008-01-04	26.37	1MB	1.50	6.50	1.50
2008-01-05	22.69	NIL	1.80	8.50	-0.50
2008-01-06	18.37	1B, 1B	1.50	6.00	2.00
2008-01-07	36.16	NIL	2.00	5.50	2.50
2008-01-08	31.17	1M, 1M	1.50	5.50	2.50
2008-01-09	37.10	NIL	2.00	5.50	2.50
2008-01-10	26.52	1S, 1B	2.00	6.00	2.00
2008-01-11	25.89	NIL	1.50	5.00	3.00
2008-01-12	33.96	2VS,1SM	1.80	6.50	1.50
2008-01-13	17.66	1MB	1.50	7.00	1.00

Does my bowel movement figures in the last 13 days have anything to do with Glucosamine Sulfate Complex 100 of which I started to take two capsules daily from 4 January 2008?

At last, at 2215 hr on 080113, I passed motion. 1 x Medium to Big (2215 hr. 3 x Banana-shaped stools with one longer one. Brown. Sunk.)

I should monitor the situation and do some research on this “Glucosamine Sulfate vs. Constipation” matter!