Flaxseed | Flax | Flaxseed Oil | Arthritis Today Supplement Guide I have been taking 6 capsules a day of flaxseed for a aching left knee, aching legs and those pesky veins that hurt also. This is day 5 and all is ok. It was a new lease on life, noooooooooooo aches. Now, that was just me. It may work for you. Now when I get up out of a chair , no pain and I can walk at a full stride. So when you climb out of your van or big rig and the first few steps sound like snap , crackle and pop, you could try flaxseed oil caps. It may work for you if your having joint pain, leg pain and so on....sky.