I used the blue bottle several years back to help with weight loss. Instead of taking 2 pills throughout the day like the bottle suggested - I would take 2 pills about an hour before I wanted to go to the gym.  Even if I didn't feel like going that day, by the time they kicked in, I was ready to go. I ended up running 5 miles a day as well as not eating as much in the evenings (when I tend to eat a lot) and within 3 months, I had lost almost 40 lbs.
 

I have taken the blue bottle in the past (with very little reaction or results) and decided to try the red bottle after seeing the commercial. I normally take in alot of caffeine during the day, so my lack of side effects I believe is normal.  It gives me a nice boost of energy and my boredom/emotional eating is held at bay. I haven't been hungry since starting the red bottle a week ago so I have to remind myself to eat the small meals I have planned.  So far I've lost 6 lbs, and I'm no longer taking in a ton of energy shots and pills. I am very happy with this product for now.
 

I started taking the Blue bottle 3 days ago and so far no side effects. It does provide an energy boost that I deparately need.  I take two in the AM with breakfast and 2 in the afternoon with lunch so I can sleep in the evenings. This approach is working extremely well.
 

I haven't tried the red bottle, but the blue bottle gives me SO MUCH ENERGY!!! I end up running like 5 miles with energy left over when I take a couple.  As for weight loss.... I have no clue since I never take them routinely.  Only when I feel like it..

I had used the blue bottle once before then tried the black bottle. I didn't notice any real difference.  However, when I bought the blue Zantrex recently, I had an allergic reaction! Blotchy face and knees and developed hives on my arms.  I wasn't sure it was the blue Zantrex until I tried it a second time with a faster and more severe reaction. I believe I my be allergic to the blue dye in the capsule.  Luckily I was able to get Benadryl ASAP. It took about an hour to subside.  Needless to say, I won't be using it again and now I'm afraid to try the black one again.

I bought the Zantrex 3 Red because it was buy one get one free at wallyworld, and seems to be pretty good so far. I am trying to curb my appetite so it did it's job.  As for anything else it still takes constant mind effort to not eat out of habit. It definitely gives a full feeling so long as you listen to your body.
 

I used the red bottle for 3 weeks and I always had upset stomach, it didn't curb my appetite and if you stand up too quick felt like I was going to pass out plus I didn't lose any weight! I decided to switch to the blue bottle and lost 3 lbs in the first 3 days I am of day 4 now and I feel normal like I am not even taking the pill.
 

I have been taking Zantrex 3 from the red bottle for about six months now. I don't drink caffeine so I was always sluggish and around 4-5 PM I would crash prior to discovering Zantrex.  On a whim, I bought Zantrex and started taking it and geez, I feel like it has changed my life. I know that sounds crazy.  I only take one pill a day, most days, either around 9:00-9:30 AM or early afternoon around 1:00 PM depending on my schedule. It makes me energetic, focused, and I feel great.  It will totally make you poop by the way, but not in a bad, Montezuma's revenge type way. I have gotten so much accomplished thanks to them.  I would love to say it made me lost weight but I am still a fatty. Sorry.  And, like I said, I only take one a day at max. Only on the random, super busy days do I take more.  Hope this helps!

i'm using the red bottle now and so far i've lost 15 pounds it's working really good. I think that some of the side effects has to do with how people are using the pills.  You absolutely have to drink tons of water when you're taking these pills and also exercise you can't just eat and take the pills but expect them to work.

I found that the blue has way too much Niacin in it. it makes my face hot, tingly, and itchy with just taking one. I started out on the red and lost 50 lbs with it a few years back.  I never had the side effects i do with the blue. I currently have them both in my cupboard as i thought they had just changed the bottle.  I can take two red pills and be fine. great energy and no side effects.

I have actually been using the blue bottle for three days and have already lost five pounds. i use them as directed and i get energy and no side effects. they are fantastic!

This explains so much. I had gotten the zantex 3 red bottle and i got super sick. i reacted really badly to it.  I couldn't sleep at night, i was nauseous all the time, i had serious diarrhea and stomach issues for almost two weeks. I had gotten anxiety attacks and had an increased heart rate.  It was pretty bad.

i've taken blue bottle, gives me more enery and i actually lose weight, tried the red bottle did absolutely nothing, and i actually gained weight, even though i was still on my diet, and exercising, but also didn't feel any enery boost at all, felt like i was taking candy since had no effect, whereas the blue bottle i always get a boost and i feel it plus i lost weight. Red bottle was a waste of money for me, as it did absolutely nothing.
 

I finished an entire blue bottle (84 count) and it gave me rapid heart beat and dizziness. I was really looking for a supplement to give me energy while I worked out which this did but ONLY if I drank it with a caffeine drink.  I was actually excited when the bottle was over because I was so tired of the all day dizziness. I've been off the blue bottle for about a week and I'm going to try the red bottle to see if this gives me the energy boost that I was looking for
 

This is the first day I'm using zantac and so far so good after about 30 min extreme energy I feel like I could run 10 miles right now. The only bad thing is I can't seem to get to sleep.  But I highly recommend this product if you need an energy boost

So I stopped taking the pills...they weren't good for me
At all they made me nauseous dizzy and out of energy
To do anything.... worst product ever for me

But everyone digestive system is different thanks
For reading 🙂

first day on zantrex,i have alot of energy,but a few moments after taking them i started itching and feeling very flush,my face was bright red and the rest of my body ad red bloches all over,its been a few hours now and they are starting to fade,but not very comfatable,i did take two,nxt time i,ll try one and see if thats better;

I recently used the blue. I found out that it gives me an extrem boost of energy after 30 min. Then it gradually wears off.  I took it at 4 in the morning and ran two miles and did a light work out. And went immediately to work my work production was good my appetite was down and I still had energy so far till twelve.  I have had no neausea or dizziness I feel great and focused. Good product so far.