Hot sauce can survive years if preserved properly. Loss of colour doesn't mean spicy sauce is unhealthy or nutrient-deficient.
If you use spicy sauce in a variety of foods, you may want to get a new bottle if it's been on your shelf for several years.
According to The Takeout and Chicago chef Rick Bayless, a change in hue could signify a change in flavour
a dimmed or subdued flavour. "When things get old, they get paler and less savoury," Bayless observed.
When your hot sauce has beyond its expiration date, watch out for mould and other contamination
If your hot sauce changes in appearance or fragrance, get a new bottle. "If there's black mould, get rid of it," adds Bayless.