* Protein synthesis
* Enzyme activity
* Metabolism of carbohydrates, fats, and proteins
* Formation of connective tissue
* Keratin production (a protein that is found in hair, skin, and nails)
* Immune function
* Antioxidant protection
Sulfur deficiency is rare, but can occur in people with certain medical conditions, such as Crohn's disease or ulcerative colitis. Symptoms of sulfur deficiency can include:
* Skin problems, such as acne, eczema, and psoriasis
* Brittle hair and nails
* Fatigue
* Muscle weakness
* Loss of appetite
* Weight loss
Sulfur toxicity is also rare, but can occur in people who work with sulfur or are exposed to high levels of the element. Symptoms of sulfur toxicity can include:
* Respiratory problems, such as coughing, wheezing, and shortness of breath
* Eye irritation
* Skin irritation
* Nausea
* Vomiting
* Diarrhea
In most cases, sulfur is safe to consume in moderation. However, people with certain medical conditions or who are pregnant or breastfeeding should talk to their doctor before taking sulfur supplements.
