Cystine

Cystine is an oxidized form of the amino acid cysteine. It is formed when two cysteine molecules link together through a disulfide bond. While both are essential for the body, they have some key differences:

• Cystine is non-essential: Unlike cysteine, your body cannot produce cystine on its own. You must obtain it from your diet or through supplements.
• Cystine stones: In some individuals with a genetic disorder called cystinuria, cystine can accumulate in the urine and form stones in the kidneys and bladder. These stones can be painful and can block the flow of urine.

Here are some of the roles cystine plays in the body:

• Hair and skin health: Cystine is a component of keratin, a protein that is important for the structure of hair, skin, and nails.
• Wound healing: Cystine plays a role in wound healing by helping to form new tissue.
• Nutrient metabolism: Cystine is involved in the metabolism of several important nutrients, including vitamin B6 and iron.

Cystine can be found in various foods, including:

• Meat (especially poultry and red meat)
• Fish
• Eggs
• Dairy products
• Oats

Cystine supplements are also available, but they are typically only used for people with cystinuria or other medical conditions that cause cystine deficiency.

Important to note:

• Cystine is generally safe for most people when consumed in moderate amounts through food sources.
• High doses of cystine supplements can cause side effects such as nausea, vomiting, and diarrhea.
• Pregnant or breastfeeding women, and individuals with certain medical conditions should consult their doctor before taking cystine supplements.

It's crucial to consult with a healthcare professional before taking any cystine supplements, especially if you have any underlying health conditions.