Skip to content
Dr. Grey AI

Protocol · Energy & Vitality

Fatigue (Chronic Fatigue & Low Energy) Protocol

Rhodiola Rosea and Coenzyme Q10 are the core of this stack, with 6 supporting supplements. Each row gives the amount the protocol lists and the grade our evidence database holds for that supplement in Fatigue (Chronic Fatigue & Low Energy).

We are re-verifying the studies cited on protocol pages; only confirmed citations are shown.

The stack

8 supplements · 5 graded · 2 confirmed studies

Amount listed in this protocol; not a recommendation.

Supplements in the Fatigue (Chronic Fatigue & Low Energy) protocol, with the amount the protocol lists, the grade on file and confirmed studies
GradeSupplementAmount listedWhy it’s in the stackEvidence on fileShop
Primary stackThe core of this protocol
Rhodiola RoseaAmount listed: 200–600 mg standardized extract (3% rosavins, 1% salidroside) daily

Adaptogen that enhances stress resilience, reduces mental fatigue, and improves physical endurance

  • Attention: improves
  • Depression Symptoms: improves
  • Cortisol: improves
  • Social Functioning: improves
  • Stress Signs and Symptoms: improves
Grade B for Attention120 people
Coenzyme Q10Amount listed: 100–300 mg daily (ubiquinol form for better absorption)

Essential for mitochondrial ATP production; supports cellular energy generation throughout the body

  • Fatigue Symptoms: improves
Not graded yet
Supporting stackListed as additions to the core
IronAmount listed: 18–65 mg daily (only if deficient—test ferritin first)

Essential for oxygen transport and energy production; deficiency is a leading cause of fatigue

  • Anxiety Symptoms: improves
  • Depression Symptoms: improves
  • Exercise Capacity: improves
Grade C for Anxiety Symptoms1 study · 198 people
B Vitamins (B12, B6, Folate)Amount listed: B-complex or individual B vitamins based on deficiency

Essential for energy metabolism; deficiencies cause fatigue, weakness, and neurological symptoms

Not graded yet
L-CarnitineAmount listed: 1–2 g daily

Transports fatty acids into mitochondria for energy production; reduces both physical and mental fatigue

  • Cognition: improves
  • Fatigue Symptoms: improves
Grade C for Cognition2 studies · 96 people
L-TyrosineAmount listed: 500–2,000 mg daily

Precursor to dopamine and norepinephrine; supports alertness and cognitive function under stress

  • Motor Control: improves
  • Working Memory: improves
  • Sleep Deprivation Symptoms: improves
Grade C for Motor Control18 people
AshwagandhaAmount listed: 300–600 mg standardized extract daily

Adaptogen that reduces cortisol, supports thyroid function, and enhances physical endurance

Not graded yet
PQQ (Pyrroloquinoline Quinone)Amount listed: 10–20 mg daily

Supports mitochondrial biogenesis (creation of new mitochondria) and cellular energy production

  • Fatigue Symptoms: improves
  • Pain: improves
  • Sleep Quality: improves
  • Stress Signs and Symptoms: improves
Grade C for Fatigue Symptoms17 people

Shop the evidence-backed picks

The supplement in this protocol graded A or B. Each opens third-party tested products, matched to the dose above where we can.

  • Grade B

Links to Fullscript, iHerb or Thorne carry our referral, so we may earn a commission at no extra cost to you. Grades come from the research and never change based on what we earn. Fullscript asks for a free account before it shows its catalog and prices. Full disclosure

How this protocol works

In plain language

Fatigue is one of the most common complaints, affecting quality of life, work performance, and overall wellbeing. It can be caused by many factors: poor sleep, stress, nutritional deficiencies (iron, B12, vitamin D), thyroid dysfunction, chronic illness, or simply the demands of modern life. Before using supplements, it's important to rule out medical causes. This protocol supports energy production at the cellular level and helps the body adapt to stress.

IMPORTANT: Persistent fatigue should be evaluated by a healthcare provider to rule out underlying conditions (thyroid disease, anemia, sleep apnea, diabetes, depression, chronic infections). Always test before supplementing with iron.

  • Rhodiola Rosea is an adaptogen—it helps your body adapt to physical and mental stress without wearing you out. It's been studied in people with burnout, stress-related fatigue, and demanding work conditions. Studies show it reduces fatigue, improves mental performance, and increases physical endurance. Best taken in the morning as it can be mildly stimulating.
  • Coenzyme Q10 is essential for energy production in every cell. It's a key component of the mitochondrial electron transport chain where ATP (cellular energy) is made. Levels decline with age and statin use. Supplementation can significantly improve energy levels, especially in people with low CoQ10 status.
  • Iron deficiency is a leading cause of fatigue, especially in menstruating women. Even without overt anemia, low iron stores (ferritin) cause fatigue, weakness, and cognitive issues. If deficient, supplementation dramatically improves energy. However, don't supplement without testing—excess iron is harmful.
  • B Vitamins are essential cofactors in energy metabolism. B12 and folate are needed for red blood cell production; deficiencies cause fatigue and weakness. B6 is involved in neurotransmitter synthesis. Vegetarians, vegans, and older adults are at higher risk for B12 deficiency.
  • L-Carnitine shuttles fatty acids into mitochondria for burning as fuel. It's particularly helpful for physical fatigue and has been studied in chronic fatigue syndrome, aging-related fatigue, and cancer-related fatigue with positive results.
  • L-Tyrosine is the precursor to dopamine and norepinephrine—neurotransmitters involved in alertness, motivation, and focus. It's particularly helpful when fatigue is related to stress, sleep deprivation, or demanding cognitive tasks.
  • Ashwagandha is an adaptogen that reduces cortisol (chronically elevated in stress), supports thyroid function, and has been shown to increase physical endurance. It addresses stress-related fatigue by improving the body's resilience.
  • PQQ is a newer supplement that supports mitochondrial biogenesis—the creation of new mitochondria. More mitochondria means more energy-producing capacity. Studies show improvements in energy and sleep quality.

Expected timeline: Iron (if deficient): 2-4 weeks for noticeable improvement. B vitamins: 1-2 weeks. Rhodiola: 1-2 weeks. CoQ10: 2-4 weeks. Ashwagandha: 2-4 weeks for full adaptogenic effects. L-carnitine: 2-4 weeks.

Printed from drgrey.ai/protocols/fatigue. For education only; not medical advice. Talk to a clinician before starting any supplement.