Too little B12 in your body can affect your bones, hair, skin, nails, energy level, mood, and memory
A clinical study at Chulalongkorn University, Thailand (2017) found that 250 mg/day of oral glutathione for 12 weeks slightly reduced melanin levels and improved skin brightness with no major side effects

Based on a 2005 case report published in the International Archives of Allergy and Immunology , we advise people with allergies to artichoke to steer clear of Wing Man, as the associated inulin content may cause severe anaphylactic shock.39 Also, because of said inulin, people with FODMAP sensitivities (fermentable oligosaccharides, disaccharides, monosaccharides, and polyols) would do well to avoid Wing Man to prevent consequent gastrointestinal symptoms, such as bloating, belching, diarrhea, abdominal pain, and nausea.63 Even people without such intolerances may experience side effects such as a temporary increase in flatulence and a significant increase in mild-to-moderate bloating, similar to those with FODMAP sensitivities.40 41 Wing Man has a couple of other qualities to recommend it as a milk thistle supplement
But every biological compound including vitamins can produce reactions depending on how it is used