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People with diabetes usually tend to have low ranges of vitamin C. Having diabetic issues also can improve your want for vitamin C. And curiously, in case you have decrease ranges of vitamin C, this will promote greater A1c ranges.

Keep studying to find extra in regards to the function of vitamin C within the physique, dietary supplements, meals and how vitamin C will be of profit in your diabetes administration routine.

Vitamin C

JUMP TO: The function of vitamin C | Vitamin C day by day necessities for diabetes | Vitamin C and blood sugar ranges | Vitamin C as an antioxidant | Vitamin C supplementation | Vitamin C-rich meals | How to incorporate extra vitamin c on a regular basis | Conclusion

The Role of Vitamin C

Vitamin C, also called ascorbic acid, is a water-soluble vitamin.

Vitamin C is an important cofactor in lots of enzyme reactions within the physique, together with:

  • Aiding with the synthesis of collagen, carnitine, and catecholamines
  • Being a robust antioxidant
  • Promotes a more healthy immune system
  • Helps regenerate different antioxidants equivalent to vitamin E
  • Involved in metabolism of ldl cholesterol and bile acids
  • Helps improve the bioavailability of iron from meals

Vitamin C will not be made within the human physique, which implies it’s worthwhile to eat it by meals or dietary supplements.

Being that vitamin C is the dominant antioxidant discovered within the blood and tissues all through the physique, it’s no shock that it’s finest recognized for its highly effective antioxidant capabilities.  

Vitamin C: Daily Requirements for Type 2 Diabetes

The beneficial day by day allowance (RDA) for the overall grownup inhabitants is 75 mg for girls and 90 mg for males, with an higher restrict of 2000 mg day by day.

However, for individuals with kind 2 diabetes and prediabetes, you could want extra.

According to analysis, individuals with diabetes have roughly 30% much less vitamin C circulating of their blood in comparison with the overall inhabitants.   

If you could have kind 2 diabetes together with issues, you could even have decrease ranges in comparison with these with out diabetes associated issues. And that is not nice as a result of massive research have discovered that vitamin C ranges and A1c ranges are related.

In truth, as your vitamin C stage declines researchers have discovered that A1C stage will increase.  

So why are your vitamin C wants greater when you could have diabetes?  

Oxidative stress brought on by elevated free radical manufacturing is widespread in kind 2 diabetes. When your physique is in a power state of oxidative stress, there’s an unseen battle occurring between pro-oxidants and antioxidants.  

As the battle rages on in your physique, your stage of antioxidant assets will get depleted, resulting in a decline in your antioxidant ranges (bear in mind, vitamin C is among the physique’s central antioxidants).

On prime of this, when your blood glucose ranges are elevated, vitamin C can’t be absorbed into cells as effectively and you may have elevated urine losses.

Therefore, as an individual with kind 2 diabetes, your necessities for vitamin C are nearer to 95 mg for girls and 120 mg/day for males (~30% greater than the RDA), particularly in case you have poorly managed diabetes.  

Vitamin C and Blood Sugar Levels

There is a few proof that exhibits taking vitamin C dietary supplements might help with higher glucose management.  

For occasion, a massive overview concluded that vitamin C supplementation lowered fasting glucose ranges by 20 mg/dL (1.11 mmol/L) and decreased A1c by zero.46%.

Another overview confirmed vitamin C supplementation decreased random glucose ranges by eight mg/dl (zero.44 mmol/L) and fasting stage by 24 mg/dL (1.36 mmol/L).

While these research do point out that vitamin C supplementation might enhance glucose ranges, one of many points is, all of the trials present contributors with differing quantities of vitamin C, starting from 100 to 1000 mg/day, and for differing durations of time.

Therefore, it’s troublesome to say how a lot is required to decrease glucose and how lengthy it’s worthwhile to take it to see an impact.

Vitamin C as an Antioxidant

Vitamin C is a potent antioxidant. The function of antioxidants within the physique is to neutralize and management free radicals – cells that trigger injury (oxidative stress) and improve the probability of diabetic issues.

Antioxidants might help stop and restore free radical injury brought on by oxidative stress, which in flip improves insulin secretion and glycemic management.

Antioxidants present in entire fruits and greens, together with vitamin C, might help stop diabetes issues.

However, there’s little proof to assist that antioxidant dietary supplements have the identical impact. Most probably as a result of vitamin C works as a part of an elaborate community of antioxidants all working synergistically collectively to exert their advantages.

Vitamin C and Diabetes

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Vitamin C Supplementation Dosage & Side Effects

Vitamin C dietary supplements are available varied types – ascorbic acid, sodium ascorbate, calcium ascorbate and a mixture of any of those types.

Ascorbic acid is the popular type of vitamin C, as it’s cheap and has the identical absorption functionality because the naturally occurring vitamin C in meals.  

You should purchase vitamin C dietary supplements in pill, powder and liquid type.

Are vitamin C dietary supplements protected?  

Overall vitamin C dietary supplements are thought of protected.

Consuming 30 to 100 mg/ day supplemented vitamin C leads to a gradual improve in blood ranges of vitamin C. At 200 mg/ day, full absorption is usually achieved. Once saturation of tissues is achieved, any vitamin C your physique would not make the most of is excreted in urine.

Interestingly, research point out vitamin C dietary supplements (400 mg/day or extra) scale back threat of deadly and nonfatal coronary coronary heart illness in individuals with diabetes. However, different research counsel ranges equal to, or over 300 mg/d are related to the potential for an elevated threat of heart problems in people with kind 2 diabetes.  

With this in thoughts, sticking to round 200 mg/ day might be finest follow.

One aspect impact of accelerating vitamin C quickly will be diarrhea. It’s typically short-term however one thing to pay attention to initially.

Another factor that has been talked about above, and one thing researchers agree upon, is that most often, consuming a eating regimen that features loads of vitamin C-rich meals offers considerably extra profit than supplementation alone. And consuming meals is clearly protected.

So the message right here is: eat loads of recent produce to get your day by day dose of vitamin C, even if you happen to do intend on supplementing.

Sources of Vitamin C

Vitamin C is of course discovered in lots of recent greens and fruits – meals which might be nice as a part of your diabetic eating regimen!

Rich sources of vitamin C embody (for 1 cup):


  • Yellow bell peppers – 341.three mg
  • Red bell peppers – 203.eight mg
  • Green bell peppers – 217.6 mg
  • Mustard spinach – 195 mg
  • Broccoli – 106 mg
  • Brussel sprouts – 100 mg
  • Kale – 87 mg

Low carb fruits (half of cup):

  • Lemon – 112.four mg
  • Strawberries – 89.four mg
  • Grapefruit – 85.1 mg

Since the vitamin C content material of meals is decreased by prolonged shelf life and cooking, uncooked greens and fruits present probably the most vitamin C.

Incorporating Vitamin C into Your Daily Plan

By specializing in consuming one serving of fruit and not less than 4 servings of greens day by day, you may simply eat greater than 200 mg of vitamin C.  

Remember to deal with uncooked meals as an alternative of cooked meals, as a result of losses of vitamin C within the heating course of.  

However, if you happen to want cooked greens, steaming preserves extra vitamin C in contrast with boiling or roasting.

A big salad that features the meals and quantities listed under offers 200 mg of vitamin C and solely 12 grams of web carbohydrates, which inserts nicely inside your objective of 50-80 grams of carbs day by day.

  • 2 cups spinach (300 mg vitamin C, 1 gram web carbohydrate)
  • Half cup pink peppers (100 mg vitamin C, three grams web carbohydrate)
  • 1 medium tomato (20 mg vitamin C, three grams web carbohydrate)
  • Half cup of strawberries (50 mg vitamin C, 5 grams web carbohydrate)

Another suggestion can be uncooked broccoli, cauliflower and inexperienced peppers with hummus or cottage cheese.  

Eating one cup of a mixture of those uncooked greens offers roughly 70 mg of vitamin C and solely four grams of web carbs. This is greater than half your day by day requirement in a fast and straightforward snack choice!


Vitamin C might help scale back oxidative injury and enhance blood sugar and A1c ranges, together with serving to to spice up your total well being.

Your want for vitamin C with kind 2 diabetes and prediabetes can improve so make sure you get sufficient consumption every day by consuming a number of recent produce, or by including a further complement.

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