Threonine

Threonine is an essential amino acid required for protein synthesis, immune function, and maintaining healthy skin and connective tissues. It plays a crucial role in collagen and elastin production, as well as supporting the central nervous system and gut health.

Threonine RDA (Recommended Dietary Allowance):

• Adults: 15 mg/kg body weight/day
  (For a 70 kg adult, this equals about 1,050 mg/day.)

ODA (Optimal Daily Allowance):

• 1,000-2,000 mg/day (depending on individual needs, age, and activity level)

Found in:

• Animal-based sources:
  • Meat (beef, chicken, pork, lamb)
  • Fish (cod, salmon, trout)
  • Eggs
  • Dairy products (cheese, milk, yogurt)
• Plant-based sources:
  • Soy products (tofu, soy milk, tempeh)
  • Legumes (lentils, black beans, chickpeas)
  • Nuts and seeds (pumpkin seeds, sesame seeds, almonds)
  • Whole grains (quinoa, oats, barley)
  • Vegetables (spinach, cabbage, asparagus)

Helps with:

• Protein synthesis: Threonine is essential for building and repairing tissues, including muscles and organs.
• Collagen and elastin production: Supports skin elasticity, wound healing, and healthy connective tissue.
• Immune function: Integral to the production of antibodies and immune cell activity.
• Gut health: Helps maintain the intestinal barrier and supports mucin production, which protects the digestive tract.
• Nervous system support: Threonine is involved in the synthesis of glycine and serine, amino acids critical for neurotransmitter function.

Insufficient doses:

• Symptoms of deficiency:
  • Fatigue or low energy
  • Weakened immune response or frequent infections
  • Digestive issues or poor gut health
  • Slow wound healing or skin problems
  • Muscle weakness or loss
• At-risk groups: People with restricted diets, malabsorption disorders, or high physical demands.

Excessive doses:

• Generally well-tolerated; no established upper limit. However, excessive intake may cause:
  • Gastrointestinal discomfort in sensitive individuals
  • Imbalances in amino acid uptake, potentially reducing the absorption of others like valine or isoleucine

Interactions:

• Synergy:
  • Works with glycine and serine to support connective tissue and nervous system health.
  • Combines with other essential amino acids for muscle repair and protein synthesis.
  • Supports immune health alongside vitamins C and D.
• Antagonistic interactions:
  • Excessive threonine may compete with other amino acids, such as lysine or methionine, for absorption.
  • High protein intake without adequate hydration can strain kidney function in some individuals.