Six Star Pro Nutrition is a supplement manufacturer (owned by Sportika based in Berlin) that offers various pro-fitness products such as whey protein, meal replacements and amino acid blends.
Its Pro Testosterone Booster claims to work on the body in three very distinctive ways:
1. Stimulates ‘free’ testosterone (testosterone already present within the body that is otherwise inert).
2. Maintains peak testosterone to cortisol ration (cortisol is released by the body when it is stressed and can break down muscle tissue).
3. Enhances performance.
Does Six Star Testosterone booster actually work?
Unfortunately, this is where Six Star Pro Nutrition Testosterone Booster starts to fall down; there is very little information on the website about exactly how it works, and although the company link very clearly to its ingredients, there is no description of how these ingredients raise levels of “free” testosterone in the body.
The site refers several times to clinical trials, and yet, does not link to the trials themselves or offer any factual evidence of the products effectiveness.
So what are the Ingredients and are they effective?
The most noted ingredient on the website is known only as ‘Boron Citrate’, which is described on another site as a ‘trace element that is found naturally in the global environment’, and is an amino acid.
While Boron Citrate is known to be used as a hormone regulator, it has been made clear on other sites that there is little scientific evidence to support this. In fact, some studies even claim that it increases estrogen, rather than testosterone, and is typically used to treat menopause.
A statement from one website claims that:
Preliminary evidence is negative in the use of Boron for improving performance in bodybuilding by increasing testosterone.
It seems the jury is still out on this one, with no clear evidence backing up the claims. Of its other ingredients, Rhodiola Extract is used for improving stamina and strength, however it is noted that it should only be used in the short term (for a period of 6-8 weeks) and evidence into its safety have only concluded that it is ‘possibly safe’.
Ginkgo Extract is a very popular supplement in its own right for enhancing vitality, energy, mood and overall well-being. That being said, there is little information regarding its use as a testosterone booster.
Six Star also lists a fair few ‘other ingredients’ on its site, most of which appear to be fillers; they don’t detail the quantity of any of them and there is no information supporting their use in the each caplet.
Are there any side effects of Six Star Testosterone Booster?
There is no information regarding side effects for this particular brand, which some might say is a good thing, however, it is also worth noting that its ingredients have had limited testing and are actively advertised as ‘possibly safe’, which means there is no way of knowing that they are, or that there won’t be any side effects.
What is the dosage? Two caplets, twice daily; which is pretty straight forward when compared to most brands.
Price and availability
Six Star Pro Testosterone Booster is available to buy through most of the usual retailers, for example, Amazon, and looks to be an astoundingly cheap supplement compared to others. For just $8.98 currently you can get a bottle of 60 caplets, but take note, this is a 15 day supply only.
Any customer feedback
Customer feedback is generally positive, if a little ‘wishy washy’, there is a section on the official site where customers can leave their own review, which is always a pro for any company, but the reviews there are minimal in quantity and quality.
Our final thoughts
To sum up, the ingredients have little evidence that they can raise testosterone, customer feedback is thin on the ground, and the side effects of any long-term use are questionable. The price seems to be the only real positive here.
In terms of effectiveness it’s not going to beat some of the best selling testosterone boosters which contain proven formulations and have the customer support to match. In our opinion unless you’re on a really tight budget, it’s a case of buyer beware.