As might be expected, customer reviews on Old School Labs' website are nearly all positive but lack depth.
More surprisingly, the 1,600+ reviews of Vintage Boost on Amazon score an impressive 4.3 out of 5. This is unusual as natural testosterone boosters can be notoriously divisive among customers since they don't work on their own; you need to commit to an exercise regime and watch what you eat.
What's more, people's bodies can react in different ways to the same supplements, so to see so many positive reviews on Amazon is a little suspicious. Indeed, one eagle-eyed customer noticed that many of the positive reviews were given only one week after purchasing Vintage Boost, which suggests they received the product in exchange for a good review.
Based on the natural-sounding and detailed customer reviews on Amazon, it seems like Old School Labs' customer service is commendable and that Vintage Boost does not cause excessive side effects. But it's hard to take the glowing endorsements regarding its effectiveness as seriously.
Tribulus Fruit Extract (500mg)
Tribulus fruit extract is included for its supposed energy and libido-boosting properties, but there is no evidence to support this. There has, however, been a study conducted on elite rugby players that showed tribulus does not affect testosterone levels. 
Maca Root Powder (450mg)
Maca root powder is also included to boost energy, mood, and libido but the required dose for these benefits is, at a minimum, 1,500mg so Vintage Boost's 450mg isn't likely to have the desired effects. 
PrimaVie® Shilajit Extract (50mg)
Clinical studies have shown that shilajit extract significantly increases testosterone levels  and promotes muscle growth and recovery.  The only problem is those studies concerned daily doses of 500mg, meaning Vintage Boost doesn't contain nearly enough.
D-Aspartic Acid (3,000mg)
Perhaps the best thing about Vintage Boost is its sizable dose of D-aspartic acid (D-AA), which is proven to promote the synthesis and release of testosterone. 
It is possible to have too much of a good thing though. Research suggests the testosterone boosting effects of D-AA plateau after a few weeks at doses over 2,000mg. As Old School Labs note, therefore, it is necessary to cycle Vintage Boost to maintain its benefits long-term.
Vitamin D3 (50mcg)
Another welcome addition, vitamin D3 supports numerous vital functions in the body, including testosterone production.  However, these effects are most pronounced in individuals already deficient in vitamin D. Those with reasonable levels won't notice a difference.
Vitamin B6 (5mg)
Vitamin B6 is found in many fresh vegetables, and its inclusion is never going to be a bad thing. One study in rats indicates it may boost testosterone levels but, as with the vitamin D study, this result is only seen in subjects deficient in vitamin B. 
Men with low magnesium levels tend to be low in testosterone, and this essential mineral also supports metabolic function, cardiovascular regulation, and athletic endurance.
Another essential nutrient for the body, zinc plays a crucial role in testosterone production. However, as with quite a few of Vintage Boost's doses, it is a little on the low side and is only likely to help those already zinc deficient. 
While Vintage Boost is far from a terrible product, there are undoubtedly better natural testosterone boosters out there for a similar price. Too many of the doses are wrong, and at least one of the ingredients (tribulus) should probably be replaced with, as we suggested, oyster extract or fenugreek as these have scientific research to back them up.
Unlike the overblown hype on Amazon, reputed health supplement reviewers seem to share our assessment, with the low doses of some ingredients and overhype of others also proving to be points of contention.
In our opinion, those who are starting a new exercise regime probably stand the most to benefit from Vintage Boost, but it does not provide any extra value compared to other natural testosterone boosters like TestoFuel and Prime Male.
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2. Dording, C. M., Fisher, L., Papakostas, G., Farabaugh, A., Sonawalla, S., Fava, M., & Mischoulon, D. (2008). A double-blind, randomized, pilot dose-finding study of maca root (L. meyenii) for the management of SSRI-induced sexual dysfunction. CNS neuroscience & therapeutics, 14(3), 182–191. https://doi.org/10.1111/j.1755-5949.2008.00052.x
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