Sulfur
Sulfur is the third most abundant mineral in the body after calcium and phosphorus, and most people have never thought about it as a nutrient at all. That’s partly because it doesn’t have a recommended daily intake the way most minerals do, and partly because deficiency in the conventional sense essentially doesn’t occur in anyone eating adequate protein. Sulfur is found in two amino acids — methionine and cysteine — that are present in virtually all protein-containing foods. If protein intake is adequate, sulfur intake is adequate. It’s that straightforward.
What sulfur actually does in the body is structural and functional in ways that matter broadly. It’s a component of connective tissue, cartilage, and skin. It’s essential for the production of glutathione, one of the body’s primary antioxidant compounds. It supports liver detoxification processes and is involved in the metabolism of certain B vitamins. It’s doing real work, just without the deficiency narrative that draws attention to most other minerals.
The sulfur compounds in certain vegetables — particularly alliums like garlic and onions, and cruciferous vegetables like broccoli and Brussels sprouts — are worth noting separately. These organosulfur compounds are distinct from the structural sulfur in amino acids and are associated with a range of health benefits including anti-inflammatory and potentially cancer-protective effects. They’re also responsible for the pungent smell associated with those vegetables when cut or cooked.
For practical purposes, adequate protein intake and regular consumption of alliums and cruciferous vegetables covers everything meaningful about sulfur without any need to track it specifically.
Reference Card
Mineral type: Major mineral Pillar: Nourish
What it does for you
- Structural component of connective tissue, cartilage, and skin
- Essential for glutathione production — one of the body’s primary antioxidant compounds
- Supports liver detoxification processes
- Involved in B vitamin metabolism
Where to get it
- All protein-containing foods — meat, fish, eggs, dairy, legumes, nuts
- Sulfur-rich vegetables — garlic, onions, leeks, broccoli, Brussels sprouts, cauliflower, cabbage
Considerations
- No established recommended daily intake — adequate protein intake ensures adequate sulfur for virtually everyone
- Deficiency is not a practical concern for anyone eating sufficient protein
- Organosulfur compounds in alliums and cruciferous vegetables have health benefits beyond basic sulfur nutrition — regular consumption of these foods is worth prioritizing independently
Signs your intake might be low
- Deficiency in otherwise healthy people eating adequate protein essentially doesn’t occur
- Joint and connective tissue issues over time in the context of very poor overall dietary quality
Common myths
- Sulfur needs to be tracked or supplemented — adequate protein intake covers sulfur needs entirely; it’s not a mineral that requires independent management for virtually anyone
- MSM supplements are necessary for joint health — methylsulfonylmethane is a sulfur compound marketed heavily for joints; the evidence for supplemental MSM beyond adequate dietary sulfur intake is modest at best