Relative Energy Deficiency in Sport (RED-S)
RED-S (Relative Energy Deficiency in Sport) is characterized by mismatched energy intake and expenditure in exercise, leaving inadequate energy to support crucial physiological functions. This can result in hormonal aberrations, impaired bone health, menstrual dysfunction, and more.
Quick Answer
What it is
RED-S (Relative Energy Deficiency in Sport) is characterized by mismatched energy intake and expenditure in exercise, leaving inadequate energy to support crucial physiological functions. This can result in hormonal aberrations, impaired bone health, menstrual dysfunction, and more.
Key findings
No graded findings are available yet.
Safety
No specific caution or interaction language was detected in the current summary/outcome notes.
ℹ️ Quick Facts
Quick Facts: Relative Energy Deficiency in Sport (RED-S)
- Supplements Studied:0
Evidence-Based Protocol
Supplement stack ranked by research quality
Primary Stack (Tier 1)
Essential for bone health; deficiency common in RED-S; supports bone mineral density and reduces stress fracture risk
Critical for bone health; inadequate intake common with energy restriction; prevents bone loss
Supporting Stack (Tier 2)
Deficiency common with low energy availability; essential for oxygen transport and energy metabolism
Supports bone health, reduces inflammation, may help restore menstrual function
Directs calcium to bones; works synergistically with vitamin D; supports bone mineralization
Supports bone health, energy metabolism, and muscle function; often depleted in athletes
Supports bone health and hormone production; often inadequate with energy restriction
Support energy metabolism; needs increased with training; often inadequate with caloric restriction
Supports connective tissue and bone matrix; may help with injury recovery
Supports collagen synthesis and immune function; enhances iron absorption
How It Works
Relative Energy Deficiency in Sport (RED-S) occurs when athletes don't eat enough to support both their training and body's basic functions. Previously called the 'Female Athlete Triad,' we now know it affects all athletes. When energy availability is too low, the body starts shutting down non-essential functions - first reproductive hormones, then bone building, metabolism, and eventually cardiovascular and psychological health.
CRITICAL: RED-S is a serious medical condition requiring professional treatment. The PRIMARY treatment is increasing energy intake and/or reducing training load. Supplements DO NOT replace adequate nutrition.
Warning signs include:
FIRST-LINE TREATMENT:
* Vitamin D and Calcium are essential. Athletes with RED-S have significantly increased risk of stress fractures and long-term bone loss. These supplements help but cannot fully compensate for low energy availability.
* Iron deficiency is common with energy restriction and affects performance and energy levels.
* Omega-3 Fatty Acids and Vitamin K2 provide additional bone support.
Expected timeline: Menstrual function often returns within 6-12 months of adequate energy availability. Bone density improvements take 1-2+ years. Full recovery requires sustained adequate nutrition - there are no shortcuts.