People with diabetes usually tend to have low ranges of vitamin C. Having diabetic problems may improve your want for vitamin C. And curiously, when you’ve got decrease ranges of vitamin C, this may occasionally promote increased 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 might be of profit in your diabetes administration routine.

Vitamin C

JUMP TO: The position of vitamin C | Vitamin C every 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 referred to as 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 robust 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 should devour it by way 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 really useful every 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 every day.

However, for folks with kind 2 diabetes and prediabetes, it’s possible you’ll want extra.

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

If you may have kind 2 diabetes together with problems, it’s possible you’ll even have decrease ranges in comparison with these with out diabetes associated problems. 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 increased when you may have diabetes?  

Oxidative stress attributable to elevated free radical manufacturing is widespread in kind 2 diabetes. When your physique is in a persistent state of oxidative stress, there may be 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 (keep 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% increased than the RDA), particularly when you’ve got poorly managed diabetes.  

Vitamin C and Blood Sugar Levels

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

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

Another evaluation confirmed vitamin C supplementation diminished 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 could 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 intervals of time.

Therefore, it’s troublesome to say how a lot is required to decrease glucose and how lengthy you should 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 injury (oxidative stress) and improve the probability of diabetic problems.

Antioxidants can assist forestall and restore free radical injury attributable to oxidative stress, which in flip improves insulin secretion and glycemic management.

Antioxidants present in complete fruits and greens, together with vitamin C, can assist forestall diabetes problems.

However, there may be 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 in numerous varieties – ascorbic acid, sodium ascorbate, calcium ascorbate and a mix of any of those varieties.

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 can buy vitamin C dietary supplements in pill, powder and liquid type.

Are vitamin C dietary supplements secure?  

Overall vitamin C dietary supplements are thought of secure.

Consuming 30 to 100 mg/ day supplemented vitamin C ends in a gentle improve in blood ranges of vitamin C. At 200 mg/ day, full absorption is mostly 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 folks with diabetes. However, different research recommend ranges equal to, or over 300 mg/d are related to the potential for an elevated danger 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 might be diarrhea. It’s typically momentary however one thing to concentrate on initially.

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

So the message right here is: eat loads of recent produce to get your every day dose of vitamin C, even in case you 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 food plan!

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 diminished 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 every day, you may simply devour greater than 200 mg of vitamin C.  

Remember to give attention to uncooked meals as a substitute of cooked meals, as a result of losses of vitamin C within the heating course of.  

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

A big salad that features the meals and quantities listed beneath offers 200 mg of vitamin C and solely 12 grams of web carbohydrates, which inserts properly inside your aim of 50-80 grams of carbs every 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 mix of those uncooked greens offers roughly 70 mg of vitamin C and solely four grams of web carbs. This is greater than half your every day requirement in a fast and straightforward snack choice!


Vitamin C can assist 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 satisfactory consumption every day by consuming a number of recent produce, or by including a further complement.

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