What do the states mean?+
- Solid: well studied, and it works.
- Half-there: the science is still forming.
- A ghost: almost no real studies.
- Hollow: well studied, and it does not work.
- A cord: the pair itself has been tested together.
- Air: nobody has ever tested this pair.
The full scoring method: How we score
Can you take lion’s mane and vitamin C together?
Nobody has tested this pair.
As of August 2026, no human trial has given lion’s mane and vitamin C together. We searched PubMed for trials naming both on 26 August 2026 and read every candidate it returned; none tested the pair.
4 studies · none tested the actual pair
See what each one is on its own
What you’re seeing
- Lion’s mane renders half-there: for memory and focus, the science is still forming.
- Vitamin C renders hollow: for preventing colds, it is well studied and it does not work.
- Nothing is drawn between them, because nothing has been run. The empty space is the review.
You can tell before you read a word.
Vitamin D + vitamin K2 is what the other answer looks like. Someone ran the study, so a cord is drawn between them. That is the whole difference.
Fair questions
Is it safe to take lion’s mane and vitamin C together?+
No trial has tested the combination, so there is no evidence either way. Nobody has found a problem, and nobody has looked.
Why does this page say nobody has tested it?+
Because we ran the search and read the results. The date above is the day we ran it. We do not claim a pair is untested without a logged search behind it.
Will this page change?+
Yes, if a trial publishes. We re-run these searches and the page changes from air to a cord the day the evidence does.
Deeper
The search we ran+
On 26 August 2026 we asked PubMed for trials, reviews and meta-analyses naming both lion’s mane and vitamin C. It returned nothing. We read every one and none gave the two together. This page carries a date because the answer can change: if a trial publishes, the air becomes a cord.
Pairs that have been tested+
- Vitamin C has been tested with L-arginine, chromium, probiotics, copper, collagen, iron.
These are the combinations someone has actually run a study on. Every other pairing here is air.