Is 1,000 mg of vitamin C safe? What dosage is too much?

Is 1000mg of vitamin C safe? What dosage is too much?

vitamin C needs | side effects | Mega doses | 1,000 mg | food vs supplements

Is a dose of 1,000 mg of vitamin C safe? Actually yes, but you shouldn’t take it for 2 reasons…

The recommended daily intake of vitamin C is 75 – 90 mg. It’s 70 mg for women and 90 mg for men.

Moreover, smokers need more vitamin C per day. They need additionally 35 mg of vitamin C a day, as smokers have increased oxidative stress. A study suggested that drinking orange juice can increase plasma concentrations of vitamin C in humans. Smokers can benefit the most.[1]

Additionally, women in pregnancy require at least 85 mg of vitamin C. Furthermore, women in lactation require at least 120 mg. Always consult your health care provider before taking any supplements.

So, the maximum recommended vitamin C dose of 120 mg is way less than the dose of a 1,000 mg pill. Is a daily consumption of 1,000 mg of vitamin C safe? Pretty safe actually…

Effects of Mega doses of vitamin C

According to a study, researchers have treated cancer patients with high dosages of vitamin C, through IVC therapy (intravenous vitamin C). Scientists gave cancer patients up to 100g of vitamin C a day![2] That’s 100,000 mg. 100 times more vitamin C than a dosage of 1,000 mg or 100,000 times the recommended daily intake of vitamin C… That’s a huge dose. So, what happened to these patients?

Regarding cancer, researchers observed:

  • survival beyond prognosis,
  • improvement in the quality of life,
  • improved tolerance of conventional therapy,
  • deterioration in clinical condition, in the absence of vitamin C dosage.

The side effects of mega dosages of vitamin C seem to be minimal, though. Patients experienced symptoms of Jarisch-Herxheimer reaction. This is a reaction of the body to endotoxins produced by the necrosis of harmful cells. Fever, chills, strong body odor, and pimples may be other side effects.

Don’t forget that these side effects happened to cancer patients, after megadoses of vitamin C. Symptoms resolved after 2 to 3 hours, after injection with vitamin C.

On the other hand, therapy with high dosages of vitamin C (IVC) may:

  • stabilize cancer,
  • reduce the risk of metastasis,
  • remain tumor stable, even aggressive ones
  • disappear breast carcinoma,
  • help on tumor shrinkage,
  • have anti tumor activity in some cases,
  • help patients regain strength, even walking again

Side effects of vitamin C supplementation

Many studies have shown no significant adverse health effects to humans, from vitamin C supplementation. People who may experience some discomfort, are those who have:[3]

  • a history of kidney stone formation,
  • iron overload,
  • taken other drugs, as well.

Side effects may be diarrhea, gastrointestinal disturbances due to the osmotic effect of unabsorbed vitamin C, or mild nausea.[4]

What dosage of vitamin C is too much anyway?

According to the National Institutes of Health, vitamin C has low toxicity and it’s rather unusual to cause serious adverse effects. Even at high intakes. The maximum dosage of vitamin C for adults is 2,000 mg daily.

Better consult your doctor before taking any supplements. Especially if you’re taking other medication. Vitamin C supplements may interact with other drugs.

What are the preferred sources of vitamin C?

There is no reason to take vitamin supplements if you eat a healthy whole food plant-based diet. Vegetables and fruits are good sources of vitamin C. You can see analytically the list with the richest foods in vitamin C here. For instance, kale, broccoli, or peppers are particularly high in vitamin C.

In conclusion, is 1,000 mg of vitamin C safe?

In general, the daily consumption of 1,000 mg of vitamin C is pretty safe. There are no side effects for most people. Certainly, people on medication should consult their health care provider, before taking any supplement.

It’s a good idea to boost vitamin C intake, especially in the winter, as vitamin C seems to be beneficial against the flu and common cold. It may boost the immune system.

Moreover, we should take at least 1,000 mg of vitamin C during the summer, as well. Vitamin C naturally boosts collagen production, protecting us from skin aging and reliving us from sunburns! Also, it helps us burn body fat and lose weight!

Certainly, eating foods high in vitamin C is the best way to boost your daily intake. But, boosting vitamin C intake from supplements could be beneficial as well. Especially, during certain times of the year!

You’ll find a wide variety of vitamin C supplements on iHerb. Click here to get a $5 discount (new customers), or a %5 discount (existing iHerb customers) on your order.