Name: C-500 Calcium Ascorbate-C
Brand: NOW
SKU: 1lAYARvM
Rating: 490.0 (6778 reviews)

Question 1

Does Vitamin C help boost the immune system?

Accepted Answer

Vitamin C contributes to immune defense by supporting various cellular functions of both the innate and adaptive immune system. It aids in the production and function of white blood cells and supports epithelial barrier function against pathogens. While essential, large doses have not been shown to significantly "boost" immunity beyond preventing deficiency.

Question 2

Can Vitamin C prevent or shorten the common cold?

Accepted Answer

Regular Vitamin C supplementation may slightly reduce the duration and severity of the common cold in some individuals, particularly those under extreme physical stress. However, it does not reliably prevent colds in the general population. Research indicates limited benefit for prevention in most people.

Question 3

What are the main overall health benefits of adequate Vitamin C intake?

Accepted Answer

Adequate Vitamin C intake is crucial for collagen formation, which supports healthy skin, bones, and cartilage. It also plays a vital role in immune function, iron absorption, and acts as a powerful antioxidant protecting cells from damage. It is essential for general growth, development, and tissue repair.

Question 4

Is Vitamin C effective for skin health and appearance?

Accepted Answer

Vitamin C is a powerful antioxidant that helps protect the skin from oxidative damage caused by UV exposure and pollutants. It is also essential for collagen synthesis, which contributes to skin structure and elasticity. Both dietary and topical Vitamin C are recognized for supporting skin health.

Question 5

Does Vitamin C act as an antioxidant in the body?

Accepted Answer

Yes, Vitamin C is a potent antioxidant that helps protect cells from damage caused by free radicals. These unstable molecules are generated by normal bodily processes and environmental stressors. This antioxidant function is crucial for overall cellular health and can reduce oxidative stress.

Question 6

Is high-dose Vitamin C effective in cancer treatment or prevention?

Accepted Answer

Observational studies suggest a correlation between higher dietary Vitamin C intake and a lower risk of certain cancers, but clinical trials with supplements have not consistently shown a preventive effect. High-dose intravenous Vitamin C is under investigation in some cancer therapies, though its effectiveness as a primary treatment is not yet established. More research is ongoing in this area.

Question 7

Does Vitamin C help with wound healing?

Accepted Answer

Yes, Vitamin C is essential for the synthesis of collagen, a crucial protein for the formation of new connective tissue. This makes it vital for the normal healing process of wounds, cuts, and burns. Adequate intake supports tissue repair and recovery.

Question 8

Can Vitamin C improve iron absorption?

Accepted Answer

Yes, Vitamin C significantly enhances the absorption of non-heme iron, which is the type found in plant-based foods. It helps convert ferric iron to a more readily absorbable ferrous form in the gut. Consuming Vitamin C-rich foods alongside iron sources can be beneficial.

Question 9

Does Vitamin C support cardiovascular health?

Accepted Answer

Vitamin C's antioxidant properties may help protect against oxidative damage to blood vessels, which is a factor in cardiovascular disease. Some observational studies suggest a link between higher Vitamin C intake and a reduced risk of heart disease. Its role in collagen synthesis also supports blood vessel integrity.

Question 10

Is Vitamin C effective in treating scurvy?

Accepted Answer

Yes, Vitamin C is completely effective in preventing and treating scurvy, a disease caused by severe Vitamin C deficiency. Symptoms such as fatigue, gum disease, and poor wound healing resolve with adequate Vitamin C intake. It is the definitive treatment for this condition.

Question 11

What are the main differences between ascorbic acid and other forms like Ester-C or Liposomal Vitamin C?

Accepted Answer

Ascorbic acid is the most common and widely studied form of Vitamin C. Ester-C, often calcium ascorbate, is a buffered form that may be gentler on the stomach. Liposomal Vitamin C encapsulates the nutrient in tiny fat-like spheres, which may enhance absorption and bioavailability in some cases.

Question 12

What is the recommended daily dosage of Vitamin C for adults?

Accepted Answer

The Recommended Dietary Allowance (RDA) for adult men is 90 mg per day and for adult women is 75 mg per day. Higher amounts may be recommended for smokers. These dosages are generally sufficient to prevent deficiency.

Question 13

Does the form of Vitamin C affect how well it's absorbed by the body?

Accepted Answer

Yes, different forms can influence absorption rates. While ascorbic acid is generally well-absorbed, some forms like liposomal Vitamin C are designed to offer enhanced absorption, potentially improving bioavailability. Buffered forms like calcium ascorbate are often chosen for better tolerance, especially for sensitive individuals.

Question 14

What is the recommended daily dosage of Vitamin C for most adults?

Accepted Answer

For most adult men, the recommended daily allowance (RDA) of Vitamin C is 90 mg, and for adult women, it is 75 mg. These amounts are generally sufficient to prevent deficiency and support overall health. Higher doses may be considered in specific circumstances.

Question 15

What is the maximum amount of Vitamin C I can take daily?

Accepted Answer

The tolerable upper intake level (UL) for Vitamin C in adults is 2,000 mg (2 grams) per day. Exceeding this limit can lead to gastrointestinal side effects such as diarrhea, nausea, and abdominal cramps. This UL is set to prevent adverse effects.

Question 16

Is there an upper limit for Vitamin C intake, and what happens if I take too much?

Accepted Answer

The tolerable upper intake level (UL) for Vitamin C in adults is 2,000 mg per day. Exceeding this limit can lead to mild gastrointestinal disturbances like diarrhea, nausea, and abdominal cramps. These effects are usually temporary and resolve once intake is reduced.

Question 17

Which form of Vitamin C is best for people with a sensitive stomach?

Accepted Answer

For individuals with sensitive stomachs, buffered forms of Vitamin C such as calcium ascorbate (often found in products like Ester-C) or magnesium ascorbate are usually recommended. These forms are less acidic than ascorbic acid and may cause less gastrointestinal irritation. Liposomal Vitamin C is also often well-tolerated.

Question 18

Is there a difference in absorption between different forms of Vitamin C, such as ascorbic acid versus liposomal?

Accepted Answer

While standard ascorbic acid is well-absorbed, some studies suggest liposomal Vitamin C may offer enhanced bioavailability due to its encapsulation in lipid vesicles. However, for most people consuming typical doses, the absorption of standard ascorbic acid is sufficient. More research is ongoing to fully compare the clinical benefits of different forms.

Question 19

Are chewable tablets or gummies as effective as capsules or powders for Vitamin C?

Accepted Answer

Chewable tablets, gummies, capsules, and powders can all effectively deliver Vitamin C. The primary difference often lies in taste, convenience, and additional ingredients like sugars or artificial colors. It's important to check the dosage per serving, as gummies or chewables might contain less active ingredient or more added sugars per unit than capsules or powders.

Question 20

When is the best time of day to take Vitamin C supplements?

Accepted Answer

Vitamin C is a water-soluble vitamin, so it can be taken at any time of day. Some individuals prefer taking it in the morning or splitting the dose throughout the day. There is no specific 'best' time for general absorption or efficacy.

Question 21

What are the common side effects of taking Vitamin C supplements?

Accepted Answer

High doses of Vitamin C may lead to digestive upset, such as diarrhea, nausea, and abdominal cramps. These effects are generally mild and more likely to occur with doses exceeding the tolerable upper intake level. Reducing the dose usually alleviates these symptoms.

Question 22

Is there a safe upper limit for daily Vitamin C intake?

Accepted Answer

The tolerable upper intake level (UL) for Vitamin C in adults is 2,000 mg per day. Consuming amounts above this UL may increase the risk of gastrointestinal disturbances like diarrhea. Exceeding this limit regularly is generally not recommended without medical supervision.

Question 23

How does Vitamin C interact with iron absorption?

Accepted Answer

Vitamin C enhances the absorption of non-heme iron, which is found in plant-based foods and supplements. This interaction can be beneficial for individuals with low iron stores or those following vegetarian or vegan diets. Taking Vitamin C with iron supplements may improve their effectiveness.

Question 24

Can Vitamin C supplementation contribute to kidney stone formation?

Accepted Answer

For most healthy individuals, Vitamin C supplementation does not significantly increase the risk of kidney stones. However, individuals with a history of kidney stones or certain underlying conditions, particularly those prone to oxalate-type stones, might need to exercise caution with high doses. Vitamin C can be metabolized into oxalate, which is a component of some kidney stones.

Question 25

Does Vitamin C interact with anticoagulant medications (blood thinners)?

Accepted Answer

Some older studies suggested high doses of Vitamin C might interfere with the effectiveness of certain anticoagulants like warfarin. However, more recent evidence indicates that moderate Vitamin C intake is unlikely to have a significant effect on most common blood thinners. Patients on anticoagulant therapy should discuss any supplement use with their healthcare provider.

Question 26

Who should exercise caution or avoid taking high doses of Vitamin C?

Accepted Answer

Individuals with certain conditions should be cautious or avoid high-dose Vitamin C. These include those with hemochromatosis (a condition of iron overload), kidney disease, or a history of oxalate kidney stones. Always consult a healthcare professional, especially if you have pre-existing health conditions.

Question 27

Are there any interactions between Vitamin C and chemotherapy or radiation therapy?

Accepted Answer

The interaction between high-dose Vitamin C and cancer treatments is complex and still under investigation. Some studies suggest potential benefits, while others raise concerns about possible interference with treatment effectiveness. Patients undergoing chemotherapy or radiation should always consult their oncologist before taking Vitamin C supplements.

Question 28

Can Vitamin C interact with antacids containing aluminum?

Accepted Answer

Taking Vitamin C with aluminum-containing antacids may increase the absorption of aluminum, especially in individuals with kidney problems. This interaction could potentially lead to adverse effects from aluminum accumulation. It is generally advisable to separate the intake of these two substances.

Vitacost	$ 14.09
Daily Vita	$ 14.50
iHerb	$ 15.30

Ingredient	Amount per serving
Vitamin C (Calcium Ascorbate)	500 mg
Calcium (Calcium Ascorbate)	55 mg
Citrus Bioflavonoid Complex	10 mg

C-500 Calcium Ascorbate-C
NOW

C-500 Calcium Ascorbate-C

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C-500 Calcium Ascorbate-C

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leaderboard Score 92.0

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boltEffectiveness for goals

scheduleDosage, timing & forms

health_and_safetySafety & interactions

Ingredients

Categories

Goals

Recommended Alternatives

C-500 Calcium Ascorbate-C

Buffered Gold C

Gold C Vitamin C 1000 mg

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Buffered Gold C

Gold C Vitamin C 1000 mg

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C-500 Calcium Ascorbate-C
NOW

Score 92.0

Analysis

Effectiveness for goals

Dosage, timing & forms

Safety & interactions