Anyone can recommend good supplement for strong bone / knee ? Due to work nature, i need to walk alot everyday . Plan to get some quality supplement to strengthen my bone

Calcium, Vitamin D & K2, Magnesium - they helps each other to absorb and allocate nutrients in the right places better.

Caltrade 600 way to go.

Calcium Magnesium D

Necro thread

Magnesium
Vitamin d3 + K2
Boron

Calcium from daily food intake is enough.

First things first: walking a lot doesn't weaken your bones, but it probably affects your joints (especially your knees)

Supplements for bones:
Calcium

(With Vitamin D if you don't get enough sunlight and Vitamin K to prevent calsification of your blood vessels due to the extra calcium)

note: I wrote a bit about calcium, vitamin D and vitamin K in this blog post. Feel free to have a read and comment if you have any questions.

But I doubt that you will need a calcium supplement, unless you have a fractured bone before.

Supplements for joints:

Most recommended: Glucosamine and chondroitin
They work well together and are quite proven to slow down the deterioration of joints.

Consider taking it together with

MSM if you have joint pain already
Fish oil - recommended for everyone anyway but in your case, fish oil is a natural anti-inflammatory which helps to improve joint function and prevent joint pain.

Other supplements:

Collagen type II
Olive extract
Boswellia Serrata (Out of all the supplements on this list, Boswellia is most proven - second to glucosamine)
Green lipped mussel

I think that's about it. Feel free to pm me if you would like a free personal supplement consultation.

try dona, may help with knee joints.
regarding bones, just make sure you drink milk and food rich in calcium. dont take Calcium supplements, it will increase your calcium levels in your blood to a level that will be considered as hypercalcaemia. read around.. you really dont want hypercalcaemia

The Glucosamine + MSM supplement for long term is not good right?

What food do you eat everyday that you need to supplement?
Until there is a good understanding what you normally eat, only can say Vitamin D because some supplements can overdose the body, such as PugBunny raised in Pug's comment.