Alpha Male Co., Ltd. Releases "The Strongest Testosterone Booster (Supplement)? Analysis Results Based on 28 Academic Papers (Ranking) [2026 Edition]"
Alpha Male Co., Ltd., operating the comprehensive male healthcare brand "Night Protein," has released a ranking comparing clinical trial data of 28 testosterone booster ingredients. This research serves as a reference for selecting scientifically-backed products.
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- 📰 Published: May 9, 2026 at 04:50
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Alpha Male Co., Ltd. (Headquarters: Kamakura City, Kanagawa / Representative: Hiroki Watanabe), which operates the comprehensive male healthcare brand "Night Protein," has released a review comparing clinical trial data of testosterone boosters.
Please use this as a reference for selecting scientifically-backed products in the testosterone booster market, where simple comparison of ingredients is difficult.
When quoting or reprinting this article, please be sure to cite the brand name "Night Protein (https://shop.nightprotein.jp/)" as the source.
*This survey is an independent study conducted by Alpha Male Co., Ltd., which operates a male healthcare brand. This article is not an independent review by a third-party organization. Please consider the published content as reference information organized based on public literature regarding each ingredient.
[Article URL]
https://shop.nightprotein.jp/shop/information/column10
[Publication Date]
May 8, 2026 (Friday)
[Ranking Summary]
In this survey, 28 types of testosterone booster ingredients were investigated, and 21 of them that met the conditions of this ranking were scored.
As a result, the top ranks (1st: TestoIncrease, 2nd: Tesnor, 3rd: Furosap) were filled by ingredients that are not yet widely recognized in Japan (few products adopt them).
Also, well-known ingredients in the Japanese supplement industry such as maca, zinc, magnesium, and boron did not rank high in terms of testosterone increase rate.
From these results, it was felt that while the recognition and demand for testosterone boosters are undoubtedly increasing in Japan, the literacy of general consumers regarding testosterone boosters and the quality (efficacy) of products existing in the domestic market might be slightly inferior compared to overseas.
In this press release, we will introduce the TOP 5 of the 21 ranked ingredients.
*Please refer to the actual article for scoring details, lower-ranked ingredients, and cited data.
1st Place: TestoIncrease (Score 6.156 points)
The testosterone booster with the highest score among the 21 investigated ingredients was TestoIncrease.
TestoIncrease has reported a high free testosterone level increase rate of 74.12% in clinical trials, showing the highest increase rate among the ingredients investigated this time.
The subjects who participated in the study were 60 healthy men with an average age of 40.
Since young and healthy subjects generally have high baseline testosterone levels before the start of the study (before intake), the increase rate is often low in such cases. However, the fact that TestoIncrease achieved a high value of 74.12%, which is not found in other boosters, makes it a rare presence.
Furthermore, a notable point is that TestoIncrease has also reported favorable changes in "IIEF," an international index for academically evaluating male sexual function.
The fact that changes have been confirmed not only in hormone levels but also in indicators related to male condition is a major feature of this ingredient.
Despite being a study targeting young and healthy male subjects, favorable changes have been reported in multiple evaluation items, making TestoIncrease one of the most noteworthy options in this survey for health management conscious of testosterone and supporting daily vitality and condition maintenance.
2nd Place: Tesnor (Score 4.5 points)
Tesnor, which possesses very diverse clinical trial data, ranked second.
Although Tesnor's maximum increase value was yielded to TestoIncrease (1st place), it recorded a 48.28% increase in free testosterone over a short intake period of 8 weeks, boasting excellent values compared to most ingredients in the market.
Tesnor's greatest strength is that it has multiple clinical trial data targeting a wide range of age groups, from young people in their 20s to the elderly with reduced vitality.
Accompanying its testosterone-enhancing effect, it is a rare ingredient being researched in various fields of male healthcare, such as daily stress care, boosting vitality, improving sleep quality, and enhancing body recomposition efficiency.
3rd Place: Furosap (Score 2.9925 points)
In third place was Furosap, which achieved a 46.5% increase in free testosterone, closely approaching Tesnor in second place.
Furosap is extracted from fenugreek seeds using a unique patented manufacturing method, with protodioscin, which is key to its bioactivity,
Please use this as a reference for selecting scientifically-backed products in the testosterone booster market, where simple comparison of ingredients is difficult.
When quoting or reprinting this article, please be sure to cite the brand name "Night Protein (https://shop.nightprotein.jp/)" as the source.
*This survey is an independent study conducted by Alpha Male Co., Ltd., which operates a male healthcare brand. This article is not an independent review by a third-party organization. Please consider the published content as reference information organized based on public literature regarding each ingredient.
[Article URL]
https://shop.nightprotein.jp/shop/information/column10
[Publication Date]
May 8, 2026 (Friday)
[Ranking Summary]
In this survey, 28 types of testosterone booster ingredients were investigated, and 21 of them that met the conditions of this ranking were scored.
As a result, the top ranks (1st: TestoIncrease, 2nd: Tesnor, 3rd: Furosap) were filled by ingredients that are not yet widely recognized in Japan (few products adopt them).
Also, well-known ingredients in the Japanese supplement industry such as maca, zinc, magnesium, and boron did not rank high in terms of testosterone increase rate.
From these results, it was felt that while the recognition and demand for testosterone boosters are undoubtedly increasing in Japan, the literacy of general consumers regarding testosterone boosters and the quality (efficacy) of products existing in the domestic market might be slightly inferior compared to overseas.
In this press release, we will introduce the TOP 5 of the 21 ranked ingredients.
*Please refer to the actual article for scoring details, lower-ranked ingredients, and cited data.
1st Place: TestoIncrease (Score 6.156 points)
The testosterone booster with the highest score among the 21 investigated ingredients was TestoIncrease.
TestoIncrease has reported a high free testosterone level increase rate of 74.12% in clinical trials, showing the highest increase rate among the ingredients investigated this time.
The subjects who participated in the study were 60 healthy men with an average age of 40.
Since young and healthy subjects generally have high baseline testosterone levels before the start of the study (before intake), the increase rate is often low in such cases. However, the fact that TestoIncrease achieved a high value of 74.12%, which is not found in other boosters, makes it a rare presence.
Furthermore, a notable point is that TestoIncrease has also reported favorable changes in "IIEF," an international index for academically evaluating male sexual function.
The fact that changes have been confirmed not only in hormone levels but also in indicators related to male condition is a major feature of this ingredient.
Despite being a study targeting young and healthy male subjects, favorable changes have been reported in multiple evaluation items, making TestoIncrease one of the most noteworthy options in this survey for health management conscious of testosterone and supporting daily vitality and condition maintenance.
2nd Place: Tesnor (Score 4.5 points)
Tesnor, which possesses very diverse clinical trial data, ranked second.
Although Tesnor's maximum increase value was yielded to TestoIncrease (1st place), it recorded a 48.28% increase in free testosterone over a short intake period of 8 weeks, boasting excellent values compared to most ingredients in the market.
Tesnor's greatest strength is that it has multiple clinical trial data targeting a wide range of age groups, from young people in their 20s to the elderly with reduced vitality.
Accompanying its testosterone-enhancing effect, it is a rare ingredient being researched in various fields of male healthcare, such as daily stress care, boosting vitality, improving sleep quality, and enhancing body recomposition efficiency.
3rd Place: Furosap (Score 2.9925 points)
In third place was Furosap, which achieved a 46.5% increase in free testosterone, closely approaching Tesnor in second place.
Furosap is extracted from fenugreek seeds using a unique patented manufacturing method, with protodioscin, which is key to its bioactivity,