antioxidant
CoQ10
The reduced, active form of Coenzyme Q10. Essential for mitochondrial ATP production in the electron transport chain. A powerful lipid-soluble antioxidant that declines with age and statin use.
Marketing vs Evidence
What brands claim
"Boosts cellular energy, fights aging, improves heart health" — widely marketed to anyone over 40.
What the research shows
Best evidence is in people with existing CoQ10 depletion — particularly statin users, where supplementation is clinically justified. "Energy boost" in healthy people is not well-supported. Heart failure benefits are real but specific to that condition.
What it’s good for
CoQ10 for Low Stamina
Solid3 studies · 3 supporting · 0 against
7 safety notes
Your muscles need CoQ10 to make energy with oxygen, which is what endurance runs on.
Dose: 100–300 mg
CoQ10 for Headaches/Migraines
Solid2 studies · 2 supporting · 0 against
7 safety notes
Helps brain cells make energy more efficiently, which appears to matter in migraine.
Dose: 100–300 mg
Tested as: CoQ10 (Ubiquinone)
CoQ10 for Chronic Fatigue
Solid1 study · 1 supporting · 0 against
7 safety notes
Your cells use it to turn food into energy. People with long-running fatigue are often low on it.
Dose: 100–300 mg
CoQ10 for High Blood Pressure
Evidence1 study · 1 supporting · 0 against
8 safety notes
Helps the lining of your blood vessels work properly, so they relax more easily.
Dose: 100–300 mg
CoQ10 for Afternoon Energy Crash
Not verified2 studies · 1 supporting · 0 against
7 safety notes
Why it gets suggested: Your cells use CoQ10 to make energy, so the theory is it steadies output through the day.
Dose: 100–200 mg
Why we could not verify it: The specific symptom is the afternoon circadian energy dip — a time-of-day phenomenon tied to post-prandial and circadian rhythm biology. Searches across PubMed and general web returned no trial that recruited participants on the basis of an afternoon energy crash or that measured time-specific energy patterns through the day. What exists is: (a) trials measuring general fatigue in athletes after exercise, (b) trials measuring mild fatigue in healthy adults using subjective fatigue questionnaires (not time-anchored), and (c) trials in CFS/ME populations. None of these are equivalent endpoints. No RCT or systematic review was found that specifically tests ubiquinol for the post-lunch/afternoo