Life Extension
Vitamin C and Bio-Quercetin Phytosome
Other Combinations250 servings
1 of 2 actives reach a studied dose, 1 falls short.
Dose 1 of 2 reach a studied dose
- Vegetarian
- Gluten Free
How it scores
What's in it, judged
Supplement Facts
Serving Size: 1 Vegetarian Tablet(s)
250 per container
- Vitamin C as Ascorbic Acid 1,000 mg 1,111%
- Bio-Quercetin Phytosome 15 mg †
- Quercetin as Japanese Sophora Concentrate 5 mg †
- Phosphatidylcholine Complex as Sunflower — †
† Daily Value not established
Other ingredients: Microcrystalline Cellulose, Stearic Acid, Croscarmellose Sodium, Stearate, Silica, Hydroxypropyl Methylcellulose, Glycerin.
Directions: Take one (1) tablet daily with food, or as recommended by a healthcare practitioner.
Reported interactions
- Interacts with:
- Digoxin ·Bortezomib ·Doxorubicin ·Tacrolimus ·Carbamazepine ·Antidepressants ·Antipsychotics ·Selexipag
- Side effects:
- Acute kidney injury ·Nausea ·Vomiting ·Diarrhea ·Abdominal pain ·Headache
From research databases. Not medical advice — talk to your physician.
Does the dose do anything?
-
Vitamin C
At the studied dose1 g / day studies used 0.1-2.5 g · 19 studies
-
Bio-Quercetin Phytosome
Below the studied range0.02 g / day studies used 0.04-3.54 g · 34 studies
What it's studied for
- Focus staminaA
Hold focus through repetitive work
Attention & executive function
- Membrane oxidationC
Protect cell membrane fats
Inflammation & oxidative stress
- Pain intensityB
Feel less intense pain
Pain
- Respiratory illnessA
Prevent acute respiratory infections
Respiratory
- Memory across tasksA
Recall information across tasks
Memory & learning
Life Extension
90/100Life Extension's quality posture is strong on testing and transparency, but a 2017 FDA warning letter limits a full trust endorsement.
- ✓ NSF certified
- ✓ Third-party tested
- ✓ Effective dosing
- ✓ Premium ingredients
- ✓ Research-backed
