Nutrients

Omega-3 Fatty Acids

Dry eyes In 2013 the International Journal of Ophthalmology published a double-blind clinical trial involving 518 subjects which found that 500 mg omega-3 capsules taken twice daily was significantly more effective than a placebo for treating dry eye. The greatest benefit was seen in patients with blepharitis and  meibomian gland disease. [Source] In

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Vitamin A

Reduce wrinkles associated with skin aging In 2007 Archives of Dermatology published a double-blind study in which 36 elderly subjects received treatment with .4 percent retinol (vitamin A) on one arm and its vehicle (control) on the other arm up to 3 times per week for 24 weeks.  Results showed

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Quercetin

Hypertension In 2007 The Journal of Nutrition published a double-blind, crossover study in which 41 prehypertensive and stage 1 hypertensive subjects received either a placebo or 730 mg of quercetin per day for 28 days. Results showed quercetin produced a modest reduction in blood pressure in stage 1 hypertension individuals,

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Vitamin C

Reduced common cold duration In 2013 The Cochrane Database of Systematic Reviews published a meta-analysis of 29 trials involving 11,306 participants which found that, while regular vitamin C supplementation could reduce the duration and severity of colds, it was not effective in preventing of the common cold. [Source] In 2006

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