Altitude Rx vs Zaca (Mountain Supplements Compared)

Altitude Rx

When traveling to the mountains, many turn to Altitude Rx and Zaca. As a company based in the high altitudes of Colorado, we'll review Altitude Rx and compare it to Zaca.

Altitude Rx

Altitude Rx, known for its OxyBoost Complex, is a natural altitude supplement.

Formulated with a blend of herbal ingredients, vitamins, and amino acids — Altitude RX aims to enhance your body's acclimation to high altitudes.

Altitude Rx is made by BRL Sports Nutrition, who makes other endurance supplements on top of their Altitude RX Altitude Acclimation Supplement.

  • EPO-Boost Natural Blood Builder & EPO Stimulator
  • Altitude Boost High Altitude Training
  • VO2-Boost Sports Performance Enhancer
  • Trifuel Energy, Endurance & Recovery Sports Drink
  • INVIGOR8 Superfood Grass-Fed Whey Protein Shake
  • INVIGOR8 Fat Burner & Appetite Suppressant
  • Flexify Advanced Joint Support

Out of these supplements, their Altitude Rx along with Altitude Boost formulas are made for mountain journeys.

Altitude Rx Reviews

Altitude Rx is reviewed on a few sites including on their company website and on Amazon. The reviews range between 4.0 stars and 4.8 stars.

Altitude Rx Reviews:

  • Website: 4.8 stars (144 Reviews)
  • Amazon: 4.3 stars (1717 Reviews)
  • Walmart 4.0 stars (6 Reviews)

Note that their Amazon and Walmart ratings are lower than their direct website. We put more weight and trust in 3rd party reviews.

Altitude Rx Ingredients

Altitude Rx incorporates a proprietary blend in what they call OxyBoost Complex, that works together with two vitamins to form their altitude acclimation supplement.


  • Vitamin C (as ascorbic acid)
  • Vitamin E (as d-alpha tocopherol acetate)
  • Alpha Lipoic Acid (OxyBoost Complex)
  • Ginkgo Bilba Extract leaves (OxyBoost Complex)

Other Ingredients:

Vegetable Cellulose (capsule), Rice Flour, Magnesium Stearate, Silicon Dioxide

While a simple formula in Altitude Rx, we do know there's some research done on Ginkgo Bilba for altitude sickness.

Science Behind Ginkgo Bilba On High Altitudes

There's some evidence to show the science behind Ginkgo Biloba for altitude sickness.

One study in Chile discovered Ginkgo Biloba to lower severity and occurrence of altitude sickness.⁴ However, other contradicting studies showed no efficacy or conflicting results for Ginkgo Biloba on altitude sickness.[⁵] [⁶]

Altitude Rx Directions

The Altitude Rx directions tell you to take 2 pills twice a day. Start 24 hours before high altitude traveling, and do not exceed 4 pills within a 24-hour day.

Synthetic Vitamins Warning

Altitude Rx appears to be using synthetically derived vitamins, including vitamin C and vitamin E. These typically are missing key phytonutrients and flavonoids in the natural compounds that make them work and absorb best.⁷

  • Vitamin C (as ascorbic acid) - Ascorbic acid is the synthetic form of vitamin C, which is typically derived from genetically modified and hydrogenated corn sugar.[⁷] [⁸]
  • Vitamin E (as d-alpha tocopherol acetate) - D-alpha tocopherol acetate is typically a synthetic version of Vitamin E, made from acetic acid and not easily absorbed.⁷

Overall, we believe it's better and healthier to stay away from synthetic vitamins.

Is Altitude RX Safe To Take?

Yes, Altitude RX is safe to take.

However, there are the downsides of taking synthetic vitamins with low absorbability and use of chemicals to make them.

Altitude Rx Side Effects

We don't of any Altitude Rx side effects specifically, and no reported side effects on their reviews.

Do note, using synthetic vitamin C known as ascorbic acid could have potential side effects according to the medical community including flushing,  headaches, nausea, dizziness, and diarrhea.⁹ While not an excessive amount, Altitude Rx contains ascorbic acid.

Altitude Rx vs Zaca

We reviewed Altitude Rx and compared it to our Zaca Chewables.

For altitude journeys, we conclude Zaca offers an easier-to-use, fast-acting, and more bioavailable supplement.

Using only fermented and herbal ingredients, no synthetic vitamins, Zaca gives you a maximum absorbability. As a chewable tablet, it also gives you a faster, easier way to get results. With these combination of benefits and founded out of the high elevations of Colorado, Zaca has become the go-to for outdoor enthusiasts, mountain goers, travelers, climbers, and hikers alike.

Altitude Rx vs Zaca Comparison Chart:

  Zaca Altitude Rx
Amazon Review Star Rating 4.5 4.3
Active Ingredients 1,100mg 1,024mg
Altitude Support
Performance Enhancing
Herbal Ingredients
Amino Acid Fortified
Sugar Free
High In Antioxidants
Synthetic Vitamin Free
High Bioavailability
Multi-Purpose Formula
GMO Free 
Gluten Free
Easy To Take
Glutamine Enhanced
Glutathione Enhanced
No Water Required

In conclusion, we believe Zaca is the better, higher bioavailable, and more convenient altitude supplement. As a chewable tablet versus a pill, you get easy-to-use and fast-acting results with Zaca.

Zaca, The Ultimate Mountain Travel Supplement

Zaca Altitude Tablets
Elevate your mountain experience with Zaca, the chewable tablet to help you rehydrate and recover. These chewables combines powerful and potent ingredients you can replenish including antioxidants and herbs. Glutathione, one of its ingredients, is shown to deplete at higher altitudes. As a easy-to-use chewable, simply take 2-4 chewables per day or as needed. Try Zaca's chewable supplement today and power your mountain travel.


1. Buy Altitude Rx - BRL Sports Nutrition
2. Altitude Rx OxyBoost Complex. Altitude Formula for Acclimation to Ski or Mountain Trips with Vitamin C, Alpha Lipoic Acid (60 Servings) - Amazon
3. Altitude Rx OxyBoost Complex. Altitude Formula for Acclimation to Ski or Mountain Trips with Vitamin C, Alpha Lipoic Acid and Rhodiola - Walmart
4. Ginkgo biloba decreases acute mountain sickness in people ascending to high altitude at Ollagüe (3696 m) in northern Chile
5. Ginkgo biloba does--and does not--prevent acute mountain sickness
6. Ginkgo biloba and Acetazolamide Prophylaxis for Acute Mountain Sickness
7. Natural vs Synthetic Vitamins
8. A Comparison of Natural (D-α-tocopherol) and Synthetic (DL-α-tocopherol Acetate) Vitamin E Supplementation
9. Ascorbic Acid (Vitamin C) Side Effects