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Still Ginned Up for Vitamin C

Friday, May 26, 2017

Ginned up: To create or arouse feelings; move or excite.

My most favorite vitamin-C-passionate ophthalmologists and optometrists stay ginned up for vitamin C. They (and I) are always excited to discuss new vitamin C studies associated with lifetime eye and body health support.

Unfortunately, humans do not have the ability to make their own vitamin C like most other mammals do. Therefore, we must obtain vitamin C through our diet and supplements.

Vitamin C is a potent antioxidant and is required for the synthesis of collagen, the structural component of blood vessels, tendons, ligaments, skin and bone. It plays an important role in the synthesis of the neurotransmitter norepinephrine, which is particularly critical to eye and brain function. It is also required for the synthesis of carnitine, the chemical molecule essential for the transport of fat to cellular organelles called mitochondria for conversion to energy.

Mitochondria are responsible for producing the ATP energy required for cellular function, including in the retina.

Vitamin C truly does support full-body health, particularly when it's presented with the full-spectrum of micronutrients.                              

Vitamin C Recommended Daily Allowance (RDA)

Unfortunately, the vitamin C RDA continues to be based primarily on the prevention of a specific deficiency disease called scurvy, rather than the promotion of optimal health. The current vitamin C RDA is only 90 mg per day for males and 75 mg per day for females.

The Linus Pauling Institute at Oregon State University reports that most of the information regarding vitamin C and the prevention of chronic disease is based on prospective studies that assess vitamin C intake in large numbers of people who are followed over time to determine whether they develop scurvy, not how it affects optimal full body health.

Food sources

Six high food sources of vitamin C are:

Red peppers    (282 mg per cup)
Kiwifruit         (150 mg per fruit)
Broccoli          (150 mg per cup)
Strawberries    (82 mg per cup)
Citrus juice      (75 mg per cup)
Tomatoes        (45 mg per cup)

Interesting research rarely discussed

A 2013 study published in the peer-reviewed journal Nutrients was titled "A randomized steady-state bioavailability study of synthetic versus natural (kiwifruit-derived) vitamin C." It looked at 36 young non smoking adult males who were randomized to receive either half a gold kiwifruit per day or a comparable supplemental vitamin C dose (50 mg) in a chewable tablet for six weeks.

Ascorbate was monitored pre-and post-intervention in weekly fasting venous blood, and in urine, semen, leukocytes and skeletal muscle.

Dietary intake of vitamin C was monitored using seven-day food and beverage records.

The conclusion: there were no significant vitamin C differences in bioavailability between the two intervention groups in any of the fluid, cell or tissue samples tested. Overall, the study showed comparable bioavailability in both synthetic and kiwifruit-derived vitamin C.
Ellen Troyer with Spencer Thornton, MD, David Amess and the Biosyntrx staff


The study published in Nutrients is certainty not suggesting that anyone should get all of their daily vitamin C from supplements. It's important to understand that nutrient-dense foods never contain just one nutrient. Kiwifruit is a perfect example: it includes vitamins C, E, K1 and folate, as well as the minerals potassium and copper.

Well-designed multiples such as Biosyntrx Eye & Body Complete provide 45 synergistic micronutrients suggested to support energy production and healthy eyes and body.

Synergy: the interaction of elements that when combined produce a total effect that is greater than the sum of the individual elements.

Eye & Body includes 500 mg of vitamin C per recommended daily dose.

FYI: The Institute of Medicine deemed the adult daily safe upper limit (UL) of vitamin C intake to be 2,000 mg per day as of 2001. One wonders why the IOM did not increase the vitamin C RDA, particularly for older adults (65 to 90) who have been shown to have lower plasma levels of vitamin C following identical intake of vitamin C, when compared with younger individuals between 15 to 65 years of age.

We sincerely wish our Friday Pearl readers a safe and thoughtful Memorial Day weekend.


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