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People with diabetes usually tend to have low ranges of vitamin C. Having diabetic problems also can enhance your want for vitamin C. And apparently, in case you have decrease ranges of vitamin C, this will promote larger A1c ranges.

Keep studying to find extra in regards to the position 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 position 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 a necessary cofactor in lots of enzyme reactions within the physique, together with:

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

Vitamin C shouldn’t be made within the human physique, which suggests you’ll want to eat it by means of 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 identified for its highly effective antioxidant capabilities.  

Vitamin C: Daily Requirements for Type 2 Diabetes

The advisable day by day allowance (RDA) for the final 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 sort 2 diabetes and prediabetes, you might want extra.

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

If you may have sort 2 diabetes together with problems, you might even have decrease ranges in comparison with these with out diabetes associated problems. And that is not nice as a result of giant research have discovered that vitamin C ranges and A1c ranges are related.

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

So why are your vitamin C wants larger when you may have diabetes?  

Oxidative stress brought on by elevated free radical manufacturing is frequent in sort 2 diabetes. When your physique is in a continual state of oxidative stress, there may be an unseen battle happening 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 likely one of 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’ll be able to have elevated urine losses.

Therefore, as an individual with sort 2 diabetes, your necessities for vitamin C are nearer to 95 mg for girls and 120 mg/day for males (~30% larger 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 giant evaluate concluded that vitamin C supplementation lowered fasting glucose ranges by 20 mg/dL (1.11 mmol/L) and decreased A1c by zero.46%.

Another evaluate 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 members 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 you’ll want to take it to see an impact.

Vitamin C as an Antioxidant

Vitamin C is a potent antioxidant. The position of antioxidants within the physique is to neutralize and management free radicals – cells that trigger harm (oxidative stress) and enhance the chance of diabetic problems.

Antioxidants will help stop and restore free radical harm 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, will help stop diabetes problems.

However, there may be little proof to help that antioxidant dietary supplements have the identical impact. Most doubtless 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 numerous kinds – ascorbic acid, sodium ascorbate, calcium ascorbate and a mix of any of those kinds.

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 buy 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 ends in a gradual enhance 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 does not make the most of is excreted in urine.

Interestingly, research point out vitamin C dietary supplements (400 mg/day or extra) scale back danger 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 danger of heart problems in people with sort 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 concentrate on initially.

Another factor that has been talked about above, and one thing researchers agree upon, is that most often, consuming a weight-reduction plan that features loads of vitamin C-rich meals gives 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 should you do intend on supplementing.

Sources of Vitamin C

Vitamin C is of course discovered in lots of recent greens and fruits – meals which can be nice as a part of your diabetic weight-reduction plan!

Rich sources of vitamin C embrace (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 essentially the most vitamin C.

Incorporating Vitamin C into Your Daily Plan

By specializing in consuming one serving of fruit and at the very least 4 servings of greens day by day, you’ll be able to simply eat greater than 200 mg of vitamin C.  

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

However, should you desire cooked greens, steaming preserves extra vitamin C in contrast with boiling or roasting.

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

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

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

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


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

Your want for vitamin C with sort 2 diabetes and prediabetes can enhance so make sure you get ample consumption every day by consuming plenty of recent produce, or by including a further complement.

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