And if a vitamin deficiency is severe enough, it can even lead to hair loss. ADVERTISEMENT However, the reality is that unless you’re deficient, there’s little evidence showing that any of these ingredients can meaningfully improve hair health—whether on your head or face. On top of this, we wondered why the Complex included forskolin, grainier Cambodia, green coffee bean, and caralluma, since the limited evidence clinical evidence reported by these same sites indicated they might have an effect on weight, but not on hair growth. Related Article: Everything You Need to Know About Hair Supplements. Finally, based on the clinical evidence, Facial Hair Complex’s ingredients probably won’t cause any side effects. In fact, other than flushing from niacin, you might not experience anything worse than mild digestive upset. Beard Oil the only ingredient found in Beard Czar’s Beard Oil is Again Spinoza, also known as Moroccan Argon Oil. This substance has been used for generations to help maintain soft, smooth hair, since it contains high levels of vitamin F and omega-6 fatty acids.