4 doctors weighed in:

What are the side effects of vitamin C overdose?

4 doctors weighed in
Dr. Michael Rothman
Internal Medicine
2 doctors agree

In brief: Mineral deficiencies

Mega dose vitamin c can actually be dangerous.
It is true that vitamin c is water soluble & you will excrete any vitamin c that you don't use. However, in order to excrete vitamin c in your urine, you must also excrete minerals as well. Therefore, excess vitamin c can lead to mineral deficiencies, especially a copper deficiency. Be very cautious in megadosing any vitamin or mineral or amino acid.

In brief: Mineral deficiencies

Mega dose vitamin c can actually be dangerous.
It is true that vitamin c is water soluble & you will excrete any vitamin c that you don't use. However, in order to excrete vitamin c in your urine, you must also excrete minerals as well. Therefore, excess vitamin c can lead to mineral deficiencies, especially a copper deficiency. Be very cautious in megadosing any vitamin or mineral or amino acid.
Dr. Michael Rothman
Dr. Michael Rothman
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Dr. Joseph Eastern
Dermatology

In brief: Has never happened

To the best of my knowledge, vitamin c overdose in humans has never been reported.
The ld50 (an estimate of how much of a substance is dangerous) of vitamin c - somewhere in the range of 850, 000 milligrams - is so high that it would be virtually impossible to physically ingest anywhere near that much of it.

In brief: Has never happened

To the best of my knowledge, vitamin c overdose in humans has never been reported.
The ld50 (an estimate of how much of a substance is dangerous) of vitamin c - somewhere in the range of 850, 000 milligrams - is so high that it would be virtually impossible to physically ingest anywhere near that much of it.
Dr. Joseph Eastern
Dr. Joseph Eastern
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