Hydroxycut® SX-7™ Black Onyx™ | GNC

Hydroxycut® SX-7™ Black Onyx™


Item # 802159


Size: 80 Capsules

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Note: This product cannot be sold in Australia


Product Information


New Hydroxycut® SX-7™ Black Onyx™ is the most hardcore and cutting-edge formula on the market today. Supercharged with 7 premium ingredients in a never-before-seen combination, this superior formula is designed for extreme energy and mental focus. Just one dose delivers an unrivalled sensory overload unlike anything you’ve ever tried.*
Try Hydroxycut® SX-7™ Black Onyx™ today!
  1. Salvia miltiorrhiza – An herb with long-standing traditional use, known to contain various phenolic acids such as danshensu and salvianolic acid B, as well as diterpene compounds such as cryptotanshinone, salvia has been added to enhance the sensory experience.
  2. Coleus – An ancient subtropical herb supplying forskolin. It's been trusted for years for its effects when combined with caffeine.
  3. Theanine – An amino acid that contributes to the unique sensory experience.
  4. Caffeine anhydrous – Scientifically researched ingredient shown to enhance thermogenesis, increase energy, and enhance mental focus.
  5. Yohimbe bark extract – A bark extract supplying a highly potent dose of the active compounds yohimbine and rauwolscine.
  6. Green coffee bean extract – Subjects taking 200mg of premium green coffee standardized for 45% chlorogenic acids lost 10.95 lbs. in 60 days with a low-calorie diet, and 3.7 lbs. in 8 weeks with a calorie-reduced diet and moderate exercise.
  7. Satsuma orange supplying beta-cryptoxanthin – An ancient Japanese citrus fruit containing the unique active carotenoid compound beta-cryptoxanthin.

Label (click image to enlarge)


To assess your tolerance, take one capsule with 8 oz. of water once per day. Once your tolerance has been assessed, take 1 capsule 2 times daily 30 to 60 minutes before your two largest meals of the day (e.g. breakfast and lunch). Once tolerance has been assessed and you are looking for an additional boost of energy, take an additional capsule with the first serving of the day. Do not exceed 3 capsules in a 24-hour period. For best results, use for 60 days in combination with diet and training.


Not intended for use by persons under 18. Do not use if pregnant or nursing. Discontinue use and consult a medical doctor if you experience unusual symptoms. Consult a medical doctor before use if you have been treated for, or diagnosed with, or have a family history of any medical condition, or if you are using any prescription or over-the-counter drug(s). Consult a medical doctor before starting a diet or exercise program. One serving of this product contains up to as much caffeine as 1.5 cups of coffee. Caffeine sensitive individuals may experience the following symptoms, including (but not limited to) restlessness, nervousness, tremors, headache, anxiety, palpitations, increased heart rate, or difficulty sleeping. Do not combine with other sources of caffeine or stimulants. Discontinue use 2 weeks prior to surgery. Do not use for more than 8 weeks. Do not use if you have heart, sleep or anxiety disorders. One serving contains up to 5.2mg of yohimbe alkaloids. Do not exceed recommended serving. Improper use of this product will not improve results and is not advised. Use only as directed. KEEP OUT OF REACH OF CHILDREN.

Other Ingredients

Capsule (Gelatin, Titanium Dioxide), Microcrystalline Cellulose, Magnesium Stearate, Silicon Dioxide
Distributed by Iovate Health Sciences U.S.A. Inc. 1105 North Market Street, Suite 1330, Wilmington, DE 19801. Made in the U.S.A. from international ingredients. © 2014. Patent pending. For lot no. and expiry date: see bottle

Nutrition Facts

Serving Size  1 Capsule
Servings Per Container  80

Amount Per Serving     % DV

Green coffee bean extract (as Coffea canephora robusta) Standardized for 45% chlorogenic acids  200 mg   **
Caffeine Anhydrous  145 mg   **
Coleus root extract (as Coleus forskohlii)  50 mg   **
L-Theanine  50 mg   **
Salvia root extract (as Salvia miltiorrhiza) Standardized for 7% salvianolic acid  25 mg   **
Yohimbe bark extract (as Pausinystalia yohimbe) Standardized for 6% yohimbine  20 mg   **
Satsuma mandarin pulp concentrate (as Citrus unshiu) Supplying 0.2% beta-cryptoxanthin  2 mg   **

** Daily Value (DV) not established.


4.5 / 5.0
44 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Stars
Awesome Results
I received a bottle of this as part of the Muscle Tech field test team. I have taken a lot of the Hydroxycut products in the past but I have to say that this one is by far the best. I have been following a reduced calorie diet for the past three months with only seeing 1-2 pounds per week come off so I really wanted to see what this product could do. I am very sensitive to caffeine so I always follow the directions exactly. This does not give me any jitters but boosted my energy level greatly. The first two weeks I took this product I did not work out because I was being lazy. I continued to follow a reduced calorie diet and took this product. I lost 8.4 pounds in two weeks! This may not seem like a lot but I have always struggled with my weight and I recently quit smoking so my metabolism has slowed way down. The third week I exercised twice that week (elliptical and Pilates) and this product helped me push harder and burn more calories than I ever have before. Great part is, I didn't feel exhausted afterwards like I normally do. At the end of week 3, I had lost another 4.2 pounds for a total of 12.6 pounds. Great product with fast results and no side effects!
November 26, 2014
Great Energy
I started taking Phentermine approx 5 years ago and despite current medical guidelines I have continued to take it for weight maintenance. I went from a size 18 to size 7 slim...220 lb down to average approx 155. Phentermine was my life saver! I've wanted to quit taking phentermine and have been scared to death of regaining weight but finally decided it was time. I quit taking phentermine and started taking Black Onyx 3 weeks ago, the positives: I've had comparible energy with Black Onyx,haven't had any weight gain,and I can take it on an empty stomach without getting terribly nauseated and jittery.
Not so positives: I haven't had as good of mental clarity as I did with phentermine,things like this generally make me very moody and irritable which has happened but it is improving, and probably the worst is I've had a lot of headaches since I started taking this.
Not having to fill a controlled RX is great..I hope Black Onyx can help me maintain with the changes I've made in my life!
January 14, 2015
Strong combination of herbs
First let me say that I've tried every Hydroxycut weight loss product for men (origional, hardcore, drink mix, gummies, and SX-7). With each, the ingredients gave a better (and more potient) result. This new product, Black Onyx, is another in the line of fantastic products from MuscleTech. That being said, Black Onyx is not for everyone. I drink/take a lot of caffeine every day and loved Hydroxycut's original SX-7. After taking it, I let my diet slide and gained some of the weight back.

Determined to lose the weight (and then some) I tried Black Onyx. I am a big guy: 6'3" and 252lbs. I usually have to take an extra pill with most supplements to see serious changes (like I did with MuscleTech's Pump), but Black Onyx's herbal blend was very strong and I could only take 1 pill 2x/day. I was not expecting much since I could not take the max dose, but to my suprize I lost 15lbs of the 17lbs I was wanting to lose.
January 11, 2015
Thanks to Muscle Tech for sending a complimentary bottle of Hydroxycut SX-7 Black Onyx to try. After using the product as directed for just a short time I must say I am really impressed. I have used various Muscle Tech products over the years with good results and this is no different. Hydroxycut SX-7 Black Onyx does not make me feel dizzy or weird even when taken on an empty stomach. It seems to give me a good amount of energy and it really obliterates my appetite. (Yay!) I often have to remind myself that I haven't eaten...for me this is a huge plus! Not being hungry allows me to make the healthy choices I like to make. This is one of my favorite Muscle Tech products to date. I highly recommend this!
November 27, 2014
Great Focus and Energy
This stuff really does what it says. There is a surge of energy and focus. It also helps manage weight. It is easy to take and works wonderfully. Just make sure to drink lots of water with this one.
November 27, 2014
Works well, in the beginning. Taking one in the morning and one in the afternoon along. I enjoy the boost of energy and the curbing of my appetite. You really do feel full faster and hungry less often. I lost about 10lbs the first month. The effect does wear off as you become used to taking it every day. You'll find that the appetite suppressant is less effective, the energy is less noticeable, and the weight loss is less. I have curbed this, slightly, by either taking 2 pills at my normal times, or taking week-long breaks.
January 25, 2015
I have tried all versions of Hydroxycut and I find that this is the best for energy and focus.
November 11, 2014
Great energy
I received this as a free sample from MuscleTech and loved the results. This gave me great energy that lasted throughout the day and really helped me overall.
October 7, 2014
The best Hydroxycut in almost 20 years!
I started taking Hydroxycut back in the mid to late 90's and it began to work for me....The then the formulas started changing. I've tried the different versions that have appeared over the years and have never had the same results that I experienced back in the 90's until now! With this new formula, MuscleTech got it right...Again!
May 6, 2015
Great product, works awesome!
leaned back down to 201 in 6 weeks from 222! Really helped me with my diet & fueled me through my day! I stopped using a powerful preworkout & went straight to using this product so I started by taking 2 every morning with my multivitamin & took another before I went to work @3pm. My job requires intense labor & I could really feel the difference. The focus is amazing, the results I got were even better!
January 29, 2015

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