Paprika, Nutmeg, or Gold as Sun?

I have a palomino paint and would love to darken up his spots a bit. Has anyone ever tried or know if paprika, nutmeg, or Gold as Sun (supplement) works? Any other suggestions/advice is welcome too :)

*I already keep him in the stall during the day

1 table spoon of parika once and day with "grain" as well as 4oz of flax seed and grass. My pally has darkend immensley.

My black mare is on Gen-X Ration Balancer, and 3tbsp of Hungarian Paprika daily. She's got shine and her color never sun-fades.
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Cool, thanks guys!