Let's start with the positives, Prime Test is relatively cheap for this type of supplement and there's a lot of positive customer reviews.
Now, on to the rest of the Prime Test review. The fact is that offering calcium (which has limited albeit some effect on testosterone) and a blent of 500mg isn't going to do all too much. Most testosterone boosting ingredients take 200mg-2000mg to be effective.
Realistically, due to labelling requirements on proprietary blends meaning ingredients have to be listed largest to smallest, it's only possibly that it contains useful doses of Horny Goat Weed, Tongkat Ali and Boron. Which means only two ingredients in Prime Test can actually raise testosterone levels. That being Boron and Tongkat Ali, and the results on Tongkat Ali are very mixed at best in clinical settings.
What's more baffling is the choice of calcium, when vitamin D, Zinc and Magnesium all play a role in raising or maintaining healthy testosterone levels, yet are all left out of the formula.
Most of the ingredients in Prime Test, if they were correctly dosed are actually libido boosters rather than testosterone boosters, and whilst this is a reason that a lot of men look for this type of supplements there are in fact actual test boosters which Prime Test should not be marketed as.
Ultimately Prime Test is a result of you get what you pay for. Most testoterone boosters that use more well backed ingredients and contain the correct dosages are 4-6 capsule a day supplements, meaning there's 2 to 3 times the ingredients in the bottle. As such they tend to cost, you guessed it 2 to 3 times more.
We'd recommend that you go with something else, or just get a cheap mens multivitamin as it will likely do you more good.
Prime Test is specifically formulated as a dietary supplement to support testosterone production in men. Prime Labs, the company behind this product, is known for its range of natural supplements aimed at improving men's vitality and overall well-being. Prime Test is manufactured in FDA-approved facilities and is designed to optimize physical strength, enhance sexual performance, and increase energy levels, all of which are associated with healthy testosterone levels.
Prime Test is generally well-tolerated, and most users do not report any significant side effects. However, as with any dietary supplement, there is a possibility of mild side effects in certain individuals. For example, the use of Horny Goat Weed in Prime Test can potentially induce headaches, dizziness, nosebleeds, and a rapid heart rate. It is advisable to monitor your body's response to the supplement and discontinue use if any adverse reactions occur. If you have any pre-existing medical conditions or are taking medications, it is recommended to consult with a healthcare professional before starting Prime Test.
This is the one area where Prime Test does quite well, due to it's low pricing it has mass market appeal. And as we stated in the intro it is likely that it at least doses tongkat ali, and horny goat weed, meaning users could see some benefits.
Of course this isn't necessarily going to make the supplement worth it when compared to better options, but it will likely be the only option a lot of people on a low budget try.
The reviews of Prime Test are generally positive, there are of course a lot of negative Prime Test reviews that simply say the product doesn't work, but they are overshadowed by enormous volumes of positive ones.
Calcium Carbonate - Calcium Carbonate is a key ingredient in Prime Test, known for its indirect effect on testosterone production during intense exercise. Studies have shown a positive correlation between calcium supplementation and natural testosterone levels when combined with physical exercise.
Beyond this we have a proprietary blend of 500mg of the following:
NB: 500mg is not enough for all of these ingredeients to be correctly dosed in line with the studies that have shown positive results, if we're being charitable Horny Goat Weed, Boron and Tongkat Ali could possibly be dosed within their effective ranges. However, due to legal requirements of these blends listing ingredients from largest to smallest, the rest can not be.
Horny Goat Weed - Horny Goat Weed, a traditional Chinese medicinal herb, has been used for centuries to increase sex drive and potentially raise testosterone levels. While its effectiveness as a testosterone booster is not scientifically verified, in fact it's long since debunked. There is some evidence that it can function for sexual health, so it could provide some symptomatic relief. 
Tongkat Ali Powder - Tongkat Ali Powder is derived from Eurycoma longifolia, a plant native to Southeast Asia. This herbal supplement is commonly used to treat male infertility and erectile dysfunction. Numerous studies have shown that Tongkat Ali extract can significantly increase testosterone levels and improve sperm count. 
Saw Palmetto Extract - Saw Palmetto Extract is obtained from ripe purple berries of the saw palmetto palm tree, commonly found in Florida. It is known for its ability to address infertility issues and treat enlarged prostate by inhibiting the breakdown of dihydrotestosterone (DHT). By preventing the conversion of testosterone into DHT, saw palmetto extract helps maintain higher testosterone levels in the body. 
Orchic Substance - Orchic Substance is an extract obtained from cattle testicles. While there is speculation about its potential benefits for maintaining testicular health, there is a lack of scientific research to support these claims. In other words, it's a novelty product that doesn't do much of anything. 
Wild Yam - Wild Yam, scientifically known as Dioscorea villosa L, is a vine found in North America. It contains a substance called diosgenin, which is believed to correct hormonal imbalances in the body. However, there is limited evidence to support its effectiveness in optimizing testosterone levels without external scientific influences. And even in the limited evidence you need several grams, and as the entire blend in Prime Test is around 1 gram, it's not going to be of any use. 
Sarsaparilla Root - Sarsaparilla Root is derived from the Sarsaparilla plant, which is commonly found in South America. It has been traditionally used in medicine to treat sexually transmitted diseases and infertility. However, there is limited scientific evidence to support its aphrodisiac properties or its ability to increase testosterone levels. 
Nettle Extract - Nettle Extract, derived from Urtica dioica or Stinging Nettle, is another ingredient known for its testosterone-boosting properties. It can prevent the conversion of testosterone into dihydrotestosterone (DHT), leading to increased overall testosterone levels. Nettle extract has also been associated with improved prostate health and blood pressure regulation. 
Boron Amino Acid Chelate - Boron is a natural element found in various fruits, nuts, and coffee. Studies have shown that boron supplementation can increase testosterone levels by reducing inflammation and eliminating estradiol, a hormone that inhibits testosterone production. This is actually one of the better ingredients in Prime Test. Additionally, it enhances the utilization of Vitamin D for hormone health. Although not explicitly listed as an active ingredient in Prime Test, it potentially plays a role in its effectiveness. 
Before diving into the details, let's weigh the pros and cons of Prime Test:
1 - https://www.ncbi.nlm.nih.gov/books/NBK583203/
2 - https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3669033/
3 - https://www.ncbi.nlm.nih.gov/books/NBK216069/
4 - https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6920068/
5 - https://pubmed.ncbi.nlm.nih.gov/16093400/
6 - https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5422695/
7 - https://pubmed.ncbi.nlm.nih.gov/21806658/
8 - https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4712861/