NOW Foods
Vitamin C-1000 Complex, Buffered Tablets


77/100
SUPPIE SCORE
60/100
EFFICACY
High
SAFETY
80/100
CLEANLINESS
What Does Vitamin C-1000 Complex, Buffered Tablets Do?
Buffered vitamin C formula paired with bioflavonoids designed to support immune function, collagen synthesis, and antioxidant defenses. Vitamin C (from Calcium Ascorbate) provides 1,000 mg a day, within the 200-3,000 mg/day studied range.
How does buffered calcium ascorbate differ from regular ascorbic acid?
Can taking 1,000 mg of vitamin C daily cause digestive upset or kidney stones?
Should I take this supplement with food or on an empty stomach?
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What Are the Benefits of Vitamin C-1000 Complex, Buffered Tablets?
Based on proven scientific research
Antioxidant DefenseVery strong
Immune FunctionStrong
Collagen SynthesisStrong
Non-Heme Iron AbsorptionStrong
Good For:
What Are the Side Effects of NOW Foods Vitamin C-1000 Complex, Buffered Tablets?
Always consult your health practitioner if in doubt.
RiskLow Risk
Overview
•High vitamin C intakes may cause loose stools, abdominal cramping, or nausea, though calcium ascorbate buffering reduces acidity.
•Excessive ascorbic acid can increase urinary oxalate excretion, elevating kidney stone risk in susceptible individuals.
•Doses of 1,000 mg vitamin C may enhance dietary iron absorption and could interfere with blood glucose test strips or occult blood tests.
•Pregnant or breastfeeding individuals should verify that total daily vitamin C from all sources remains well within the 2,000 mg upper intake level.
•Contains citrus bioflavonoids and Sophora japonica extracts; individuals with specific botanical sensitivities should exercise caution.
Potential Side Effects
Negative Interactions
Allergens
Citrus (citrus bioflavonoid complex)Sophora japonica flower bud extractAcerola fruit
Inactive Ingredients
Hydroxypropyl cellulose
Low RiskHypromellose (cellulose)
Low RiskStearic acid (vegetable source)
Low RiskMaltodextrin (
Low RiskSilicon dioxide
Low RiskMagnesium stearate
Low RiskWhat Are the Ingredients in NOW Foods Vitamin C-1000 Complex, Buffered Tablets?
Vitamin C (from Calcium Ascorbate)
1 g (1,000 mg)
Calcium (from Calcium Ascorbate)
100 mg
Citrus Bioflavonoid Complex
250 mg
Acerola Powder Complex (Malpighia punicifolia) (Fruit)
50 mg
Rutin Complex (from Sophora japonica Flower Bud)
50 mg
Malpighia punicifolia
from Sophora japonica Flower Bud
Hydroxypropyl cellulose
hypromellose (cellulose)
stearic acid (vegetable source)
maltodextrin (
Silicon Dioxide
Magnesium Stearate
Dosage & Bioavailability
How the active doses and forms in Vitamin C-1000 Complex, Buffered Tablets compare to the research.
•Vitamin C (from Calcium Ascorbate) 1,000 mg a day; within the 200-3,000 mg/day studied range.
•Calcium (from Calcium Ascorbate) 100 mg a day versus 800-1,000 mg/day studied range.
•Citrus Bioflavonoid Complex 250 mg a day versus 500-1,000 mg/day studied range.
Frequently Asked Questions
Common questions about NOW Foods Vitamin C-1000 Complex, Buffered Tablets