I have been trying Huel Vanilla and I’m 100% sure it is having a diuretic effect unrelated to water intake. For a few hours after I drink it I have to urinate at least every 40 minutes and it poses an obstacle to leaving the house.
Possible candidates for causative ingredient are:
Less likely candidates:
Gluten (I eat quite a lot of bread without problems)
Large amounts of vitamins (I only have 100g a day so the vitamin amounts are not excessive)
Has anyone else experienced this and/or done any detective work on this already?
Yes, I’ve tried that. It doesn’t cause me to feel a constant, noticeable need to urinate for hours like Huel does. The night after I have Huel I also have to wake up to urinate multiple times in the night, which I normally don’t. It’s quite a significant difference.
You’re right…but what else could have a diuretic effect?
Maybe the shake contains more fluid than a solid meal.
Maybe sucralose causes insulin spikes and consecutive insulin resistance and diabetes - but this would be a long-time effect, which does not seem to be the case here, either…
none of the ingredients from what I can see and the virtually zero trace amount of caffeine certainly wouldn’t - maybe the change in fibre/water processing balance as Adrian suggested. I Usually replace two meals a day with Huel and there seems to be a very narrow tipping point on fluids. If I keep my water intake balanced just right then its fine - one glass of water to many and I’m in the same boat. Getting a perfect hydration balance consistently though is virtually impossible.
As Huel has a high fibre content it should be the opposite - because fiber delays or even inhibits the absorption of water from the intestines. This would explain why some people get diarrhea from Huel, but not a diuretic effect…
Perhaps some phytonutrient interferes with his aldosterone metabolism…when browsing the literature on pubmed I just couldn’t find which one it might be…
I guess it could also be the salt intake - if you are drinking the same amount of fluids as usual - introducing a Huel meal and so reducing your sodium levels may also trigger water release. if this were the case I would have thought your body would normalise in a few days of keeping to the same diet.
Thanks for all the suggestions, I really appreciate the help with this. Some really interesting ideas here. Especially @mbs your comment about phytonutrients and aldosterone metabolism, and @Phil_C if i do give Vanilla Huel another go I’ll certainly try adding a bit of salt to test this, thanks for the suggestion.