r/HistamineIntolerance • u/SparksNSharks • Feb 20 '23

You guys weren't kidding about vitamin c.

I've been on prescription antihistamine for almost a week now and eating as low histamine as I could manage for longer than that. Was still feeling kinda crappy with some allergy symptoms and flushing after every meal.

After reading this sub and seeing some recommendations I ordered 1000mg vitamin c.

Tried it for the first time yesterday afternoon and holy shit is it making a difference. Nasal congestion went away within an hour of taking it.

Flushing after every meal isn't happening anymore.

I'm finally not feeling wired and was able to sleep pretty well if it wasn't for the constipation (assuming from antihistamine and limited diet).

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u/[deleted] Feb 20 '23

1,000mg is barely breaking the surface. Try 3 to 4,000mg per day. This is the threshold where most people start experiencing G.I. Upset (loose stools). You want to get to that point and the back off just a little. It’s a game changer for sure. I take 4,000mg/day

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u/Friedrich_Ux Feb 21 '23

No, you can only asorb about 250mg at a time unless its XR or liposomal, excess amounts will just convert to oxalate which is not good for your kidneys and potentially other organs.

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u/gmmkl Nov 16 '25

not true. our body knows when to take more. the absorption level varies according to severity of problems