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Why do humans not produce Vitamin C in their bodies unlike most mammals?

Dr. Aris Thorne
Dr. Aris Thorne
Senior Science Editor · Apr 3, 2026 · Updated Apr 13, 2026

We have what used to be the gene for producing vitamin C, but thanks to random mutations over generations, ours no longer works. Normally such a mutation would be quickly filtered out of the gene pool by being fatal to those who have it. But because we got enough vitamin C from our diet, the muta…

69
Words

1 min
Read Time

#207
of 500 in Animals

+1%
vs Category Avg

The Short Answer

We have what used to be the gene for producing vitamin C, but thanks to random mutations over generations, ours no longer works. Normally such a mutation would be quickly filtered out of the gene pool by being fatal to those who have it. But because we got enough vitamin C from our diet, the mutation didn't matter and has spread to the entire human population at this point.

Analysis

Key Concepts: Gene, vitamin, mutation

This explanation focuses on gene, vitamin, mutation and spans 69 words across 3 sentences. The depth is typical for Animals questions (category average: 68 words), striking a balance between accessibility and completeness.

What This Answer Covers

The explanation opens with: “We have what used to be the gene for producing vitamin C, but thanks to random mutations over generations, ours no longe” It then elaborates by presenting a contrasting perspective, ultimately building toward a complete picture across 3 connected points.

How This Compares in Animals

Ranked #207 of 500 Animals questions by answer depth (top 42%). This falls in the detailed tier — above average depth. The explanation goes beyond surface-level but keeps things accessible.

Frequently Asked Questions

Is there a simple explanation for why humans not produce vitamin c in their bodies unlike most mammals?

We have what used to be the gene for producing vitamin C, but thanks to random mutations over generations, ours no longer works. Normally such a mutation would be quickly filtered out of the gene pool by being fatal to those who have it. But because…

How detailed is this explanation compared to similar Animals questions?

This is an above-average answer at 69 words, ranked #207 of 500 Animals questions by depth. The key concepts covered are gene, vitamin, mutation.

What approach does this answer take to explain humans not produce vitamin c in their bodies unlike most mam?

The explanation uses root cause analysis and contrasting perspectives across 69 words. It is categorized under Animals and addresses the question through 2 analytical lenses.