MikeDC, your post #23 doesn't agree with your post #26.
Post #23: "I have two other people who have lot 36919. Both have dark brown particles.
One person has all white 36919 and other two have dark brown."
Post #26: "So all sample of 36919 are brown. "
You say one person had all white 36919.
I have product from the same lot and it is white with brown particles.
I really do NOT like the possibility of the color of a product changing from batch to batch. The possibility of someone using something other than Niagen concerns me.