Vitamin C Time Release 1000 mg

Vitamin C Time Release 1000 mg
Size

60 tablets

Natural Product Number

80040620

Vitamin C is an antioxidant required for tissue growth and repair, as it is essential in the formation of collagen. It is well-known as a stimulator of the immune system, especially in the prevention and treatment of the common cold.
Although vitamin C has been shown to be antiviral and antibacterial, its main effect is via improvement in host resistance.

SKU: 0416 Category:

Description

Suggested Use

Adults: Take 1 tablet daily or as directed by your health-care practitioner.
Duration of use: Consult a health-care practitioner for use beyond 2 months.

Cautions and warnings:

Warning: Consult a health-care practitioner prior to use if you are pregnant or breast-feeding, or if you are taking any prescription medications.
Known adverse reactions: Allergy/hypersensitivity to Rosa canina, rose hip dust, its constituents, or members of the Rosacea family has been known to occur; in which case, discontinue use.

Ingredients

Each tablet contains:
Vitamin C (ascorbic acid)1000 mg
Citrus bioflavonoids150 mg
Rose hips (Rosa canina)50 mg
Other ingredients: Hyprolose, microcrystalline cellulose, dicalcium phosphate, vegetable stearic acid, vegetable magnesium stearate, and silicon dioxide, with a coating of polyvinyl alcohol, talc, polyethylene glycol, and polysorbate 80.

Evidence supporting the use of vitamin C

IndicationDoseOutcome

Prevention of Cold and Flu

Vitamin C1 g/d during winterTaking 1 g/d of vitamin C all winter reduced the length (by 22% overall, 47% in men) and severity of URTI in athletes.
500 mg daily for 5 yearsTaking 500 mg of vitamin C reduced the frequency of colds among older Japanese adults; the risk of developing three or more colds over 5 years decreased by 66%, RR 0.34 (0.12–0.97), compared to taking only 50 mg/d.
2 tablets per day during winterTaking 2 tablets of vitamin C daily from November to February significantly reduced the number (37 v. 50, p < .05) and duration (severe symptoms for 1.8 v. 3.1 days, p < .03) of the cold.
Zinc15 mg/d preventively; increased to 30 mg acutelySupplementation reduced the number of colds in children compared to placebo (1.2 v. 1.7 colds per child; p = 0.003). There was a decrease in cold-related school absence and a reduced duration and severity of cold symptoms.
Green tea extract378 mg/d catechins + 210 mg/d theanine during the winterAmong health-care workers supplemented, the incidence of clinically defined influenza was reduced by 75%: 4 participants (4.1%) compared with the placebo group, 13 participants (13.1%) (adjusted OR, 0.25; 95% CI, 0.07 to 0.76, p = 0.022).
Taken twice daily for 3 monthsGreen tea significantly decreased the frequency of cold and flu symptoms (32.1% fewer subjects with symptoms), number of illnesses (22.9% fewer illnesses of at least 2 days duration), and reduced the number of days with symptoms by 35.6%.
GTE also increased T‑cell proliferation and IFN‑gamma secretion.

Treatment of Cold and Flu

Vitamin C1000 mg every hour for 6 hours, then three times dailyStudy of 463 control students and 252 in the treatment group recorded their cold and flu symptoms. When subjects fell ill, they took either decongestants (control) or megadose vitamin C (treatment). Flu and cold symptoms in the test group decreased 85% compared with the control group after the administration of mega-dose vitamin C.
ZincN/AA double-blind, randomized, placebo-controlled trial in 108 COPD patients with acute URTI on antibiotics found that the addition of echinacea, zinc, selenium, and vitamin C significantly reduced the length and severity of exacerbation episodes following URTI compared to placebo.
30 mg/d acutelySee above for prevention of cold and flu.

Other Infections

Vitamin C250 mg/dChlamydial cervicitis. Adding vitamin C to doxycycline and triple sulfa was more efficient than standard regimen without vitamin C in treating chlamydial cervicitis; significantly greater decrease in discharge and dyspareunia (p = 0.005, p < 0.001).
500 mg twice dailyH. pylori infection. The addition of vitamin C to drug therapy for H. pylori increased the eradication rate to 91.25%, which is higher than both the ideal 80% eradication rate and the 60% eradication rate achieved in the control group (drugs only).
100 mg/d for 3 monthsPrevention of UTI in pregnancy. The incidence of UTI was significantly lower in the vitamin C–supplemented group (12.7%) compared to nonsupplemented (29.1%), (p = 0.03).

Allergy and Asthma

Vitamin C1500 mg/d for 2 weeksSupplementation with vitamin C reduced exercise induced bronchoconstriction in asthmatic patients compared to placebo.
1 g/d for 4 monthsVitamin C modestly reduced corticosteroid requirements compared to placebo in asthmatics.
2 g acute doseAcute oral administration of 2 g vitamin C decreased bronchial responsiveness to inhaled histamine in 16 patients with allergic rhinitis compared with placebo. Lung function testing was significantly improved one hour after treatment with vitamin C but not with placebo.
Bioflavonoids100–500 mg per dayVarious mixtures of bioflavonoids have been shown to reduce symptoms of wheezing and seasonal allergy.