The US market is a major source of revenue for most Nutra brands and affiliates. But there are many other strong regions for Nutra products, and many affiliate networks provide Nutra offers for highly specific geos. When developing content for them, use local imagery and appropriate stock models or artwork.
Celebrities endorse many Nutra fads, trends, or products, giving a lot of kudos to your content. But only refer to true global superstars when addressing non-English, eastern European, or Asian audiences. Instead, find local or regional celebrities or stories with more relevance to that geo.
Finally, check regulations for affiliate offers in the areas you plan to try, especially where cultural or religious sensitivities might come into play. Even relatively neutral marketing content or affiliate offers can cause friction.