I think I lasted about 2 weeks. And this was using a combination of Huel powder and H&S. Unfortunately, the H&S only lasted about a week.
The original goal was to see if I could make it for a month going purely on a Huel diet. I started the challenge with the idea of keeping to 3 meals a day, so I was planning on drinking two large (1.5x servings) shakers of the powder for breakfast and lunch, and then dinner was to be two, usually different versions of H&S. Unfortunately, I started running into problems after about 5 days.
First problem: My body started rejecting the H&S after 5 days. And what I mean by this isn’t that I was throwing it up, but that it became extremely hard to force myself to swallow it. The taste remained fine, and still appetizing, but my body just kinda said “No”.
Second problem: This started after I switched to powder only. I started feeling very full after only 4 servings spread through the day, and had a lot of difficulty getting to 5 for the full 2000 daily calorie intake recommendation. This may have been a problem with bloating, as I started getting quite gassy when I went to this point - even though I had been using Huel powder for quite a while before I attempted this.
Third problem: I started craving something more solid to eat, anything I was around with crunch made it very difficult to keep on this diet. This is actually what caused me to quit the challenge early, as the cravings became strong enough that I just had to get something different to eat.
Fourth problem: This was mentioned in the second problem, but I started to get very gassy again. When I first started Huel, I had a week of very bad gas and bloating, then another week where it was still bad but had gotten better, and then another 2 weeks before it decreased to near normal levels. This pushed the gas back to where I had been shortly after starting Huel, and I was quite uncomfortable.
As for my mental health, I didn’t notice anything particularly different. I might have been a little bit shorter with others as I was in discomfort the majority of the challenge, but I don’t think it was a big issue. One thing I did notice is that my activity level decreased, and I’ll chalk this up to the gas issue. I was in a level of uncomfortableness that exercising wasn’t something I was interested in and when I did exercise, there was excess gas (if I had been going to a gym I’d have been embarrassed, but since I wasn’t it was just annoying).
As for how I took my Huel, it was just Huel and water.