Best Testosterone Booster for Erectile Dysfunction | 2025

Erectile dysfunction (ED) affects millions of men in the United States and the rest of the world, and low testosterone is a major contributor. As men age, their testosterone levels naturally decline, which can cause fatigue, emotional instability, muscle loss, increased fat around the abdomen, and, above all, ED.

We took the trouble of researching and compiling a list of top natural testosterone and ED solutions on the market today. We’ll start with TestoPrime, the best testosterone booster for erectile dysfunction; however, all of the products on our list are worth considering, as each brings its unique perks.

Best Testosterone Boosters for Erectile Dysfunction: First Look

1. TestoPrime – Overall best testosterone booster for erectile dysfunction
2. Innerbody Testosterone Support – Best for paleo and keto dieters
3. Testosil – Best for fast-acting testosterone supplement
4. Testo-Max – Best for strength and energy
5. Testogen – Best testosterone booster for beginners
6. D-Bal Max – Best testosterone booster for bodybuilders
7. Prime Male – Best for overall vitality
8. XWERKS Rise – Best testosterone booster for sexual performance
9. Provacyl – Best testosterone booster for males over 60

How To Choose the Right Testosterone Booster for ED

If you’re an older man exploring natural ways to support erectile dysfunction and overall vitality, choosing the right testosterone booster can feel overwhelming. Here’s what to keep in mind to make an informed choice.

Factors to Consider

First, you have to remember a few key factors:

• Ingredient Profile: Prioritize ingredients that are scientifically known to help with testosterone, blood flow, or sexual function, like tongkat ali, DAA, L-arginine, zinc, and vitamin D.
• Dosage: Even good ingredients won’t work if there’s not enough of them. Look for products that list specific amounts for each ingredient (not just a “proprietary blend”) and ensure those amounts match what scientific studies suggest is effective.
• Brand Reputation: Choose a brand you can trust. This includes companies that are open about their sourcing, manufacturing practices, and third-party testing. A reputable brand is more likely to produce a safe and high-quality product.
• Reviews: Read what other real users are saying on Reddit or Quora. Look for consistent themes in reviews about effectiveness for ED, energy, and overall vitality. Be wary of reviews that sound too good to be true or those that only focus on minor details. Also, check for mentions of side effects.

Natural vs. Synthetic Options

It’s crucial to understand the difference between natural testosterone boosters and synthetic options. Natural boosters use vitamins, minerals, and herbal extracts to support your body’s ability to produce testosterone. They don’t introduce external hormones.

On the other hand, synthetic options, like prescription testosterone replacement therapy or TRT, involve directly administering synthetic testosterone into your body.

For ED, natural boosters are an over-the-counter supplement route, while TRT is a medical treatment for diagnosed low testosterone and requires doctor supervision due to potential risks.

Warnings for Specific Medical Conditions

Before taking even the best testosterone booster for erectile dysfunction, especially if you have existing health issues or are on medication, always consult your healthcare provider. Certain ingredients might interact with prescription drugs or worsen specific conditions.

For example, some herbs could affect blood pressure, blood sugar, or interact with blood thinners. Men with prostate cancer, heart disease, or sleep apnea should be particularly cautious. Your doctor can assess if a supplement is safe for your unique health profile and advise on appropriate dosages.

Detailed Reviews of the Best Testosterone Boosters for Erectile Dysfunction

Read our in-depth reviews of the best testosterone supplements for erectile dysfunction on the market to find the one that’s right for you.

1. TestoPrime – Best Testosterone Booster for Erectile Dysfunction Overall

Pros

• Gluten-free, dairy-free, and made without GMOs
• Shared by over 500 clinicians on FrontrowMD
• 60-day guarantee
• 15% off when you subscribe

Cons

• It may cause digestive discomfort

Overview

TestoPrime was created by Wolfson Brand Limited, a company that specializes in the development of natural remedies. It includes natural ingredients that may support those with erectile dysfunction by targeting factors related to healthy blood flow and testosterone.

Plus, it includes vital ingredients for libido and sexual performance, thereby offering indirect support for issues related to erectile dysfunction.

Dosage

• 4 capsules daily, first thing in the morning

Pricing

• 1 month: $64.99 or $55.24 for subscribers
• 3 months: $129.99 or $110.49 for subscribers
• 5 months: $194.99 or $165.74 for subscribers

User Testimonials

Customer experiences are mixed; Michael appreciated the company but felt the product itself didn’t work well. In contrast, Yizhak praised both the product and customer service as “great,” but expressed significant dissatisfaction with shipping, as it took two months to receive the order [1] [2].

>>Find the best price for TestoPrime

2. Innerbody Testosterone Support – Most Potent

Pros

• Gluten-free and non-GMO
• Third-party tested
• Paleo and keto-friendly
• Save up to 40% when you subscribe

Cons

• Relatively expensive than its competitors

Overview

Though newer to the market, Innerbody’s T-booster fills gaps often overlooked by top competitors. It’s third-party tested and contains all the essential botanicals, vitamins, and minerals you need. Plus, the blend includes key testosterone-optimizing nutrients that are crucial for hormonal balance and are compatible with both paleo and keto dietary principles.

Dosage

• 4 capsules daily

Pricing

• 1 month: $78 or $66.30 for subscribers
• 3 months: $234 or $163.80 for subscribers
• 6 months: $468 or $280.80 for subscribers

User Testimonials

On the official website, Diana shared that her husband found this product incredibly effective over the past year, significantly improving his workouts. She also praised their customer service for quickly reissuing an order sent to the wrong address. Carlos likewise noted the product “works pretty well but cautioned users not to expect miracles but to focus on consistent workouts [3].

>>Buy Innerbody Testosterone Support here

3. Testosil – Best for Fast Results

Pros

• Recommended by over 300 FrontrowMD physicians
• Transparent and standardized ingredient list
• BBB-accredited manufacturer
• Installment payments for bulk orders

Cons

• May cause bloating and indigestion for some

Overview

Manufactured by Leading Edge Health, Testosil focuses on relevant herbs and a precise blend of vitamins and minerals, all in standardized forms. This means Testosil stands out as the best testosterone booster for erectile dysfunction by ensuring you receive a consistent, effective dose of each key active compound.

Dosage

• 4 capsules daily

Pricing

• 1 month: $69 or $59 for subscribers
• 3 months: $177
• 6 months: $294

User Testimonials

On Amazon, one user noted a “slight energy burst” and improved focus without a crash, but questioned if the “bit pricey” tag justified the results, planning to re-evaluate after finishing the bottle. In contrast, Kevin simply stated he “Took for 2 months and did not notice anything [4] [5].”

>>Learn more about Testosil benefits

4. Testo-Max – Best for Strength and Energy

Pros

• Suitable as a pre-workout
• Fast delivery within 24-48 hours
• Buy 2, get 1 free
• Includes key vitamins and minerals

Cons

• May cause headaches for some

Overview

CrazyBulk, a trusted name in dietary supplements, claims its Testo-Max T-booster is a powerful strength and energy aid. They also state that when paired with targeted workouts and a suitable diet, Testo-Max is reputed to be effective in fast muscle gains, strength and stamina, fast recovery, and is known to support both bulking and cutting cycles.

Dosage

• 4 capsules per day
• Take 20 minutes before your breakfast on both workout and non-workout days
• Use for 2 months on and 1.5 weeks off

Pricing

• 1 month: $64.99
• 3 months: $129.98

User Testimonials

On the r/supplements subreddit, one user noted Testo-Max’s low ingredient doses but found it acceptable since it could be easily stacked with other CrazyBulk supplements. Meanwhile, Brian on Trustpilot praised both the “Great service and product,” reporting noticeable results after just one month of using Testo-Max alongside DecaDuro (another CrazyBulk supplement) [6] [7].

>>Buy Testo-Max directly from CrazyBulk

5. Testogen – Best for Beginners

Pros

• Free worldwide shipping on all orders
• Suitable for vegans and vegetarians
• No proprietary blends
• Free lifestyle guides with every purchase

Cons

• Lacks vitamin D

Overview

Founded by Andy Slack, Health Nutrition is a one-stop platform for fitness supplements, and it offers Testogen as the best natural testosterone booster for erectile dysfunction for beginners. The supplement provides foundational male health support with essential minerals without overly complex ingredients or extremely high stimulant loads.

Dosage

• Take 4 capsules each morning

Pricing

• 1 month: $54.99 or $43.99 for subscribers

User Testimonials

On Amazon, Rick noted the pros of timely delivery and a perceived increase in testosterone, but disliked the high price and the need to take four pills daily. Meanwhile, another user found the product ineffective, unwilling to continue a four-capsule-a-day regimen for minimal results, and suggested reducing fillers to lower the daily dose [8] [9].

>>Get Testogen here

6. D-Bal Max – Best for Bodybuilding

Pros

• 60-day refund policy
• Soy and gluten-free
• Massive multibuy savings
• Buy now, pay later with Sezzle

Cons

• Free shipping only on orders over $89.99

Overview

For bodybuilders, D-Bal Max is the best testosterone booster for ED due to its multi-faceted approach. Expect ingredients crucial for energy production, muscle function, and testosterone synthesis, all of which support sexual health and improve erectile function.

Dosage

• 4 capsules with a glass of water 30 to 45 minutes before lifting

Pricing

• 1 month: $69.99
• 3 months: $139.99
• 5 months: $209.99

User Testimonials

On the r/supplements subreddit, a user reviewing D-Bal Max noted its ample ashwagandha but pointed out the absence of D-aspartic acid and fenugreek. They also observed that while it provides key nutrients, it contains vitamin C and B6 instead of vitamin D3. Positively, the user praised its inclusion of caffeine and amino acids [6].

>>Try D-Bal Max risk-free for 60 days

7. Prime Male – Best for Overall Vitality

Pros

• Vegan capsules
• Free Prime Male Vitality T-Shake with all orders
• Suitable for those sensitive to stimulants
• Several combo deals

Cons

• Limited 30-day return policy

Overview

Prime Male is manufactured by Roar Ambition, a reputable sports nutrition company. It includes a blend of 12 ingredients, all vital for natural testosterone production, and may help reduce stress and improve energy.

Dosage

• Take one capsule four times per day with a meal or snack

Pricing

• 1 month: $75
• 2 months: $150
• 5 months: $225

User Testimonials

On Amazon, Roger criticized Prime Male as “way too expensive for what this product provides”. That said, Eli, a long-term user of Roar Brand supplements, including Prime Male, reported two years of positive effects like muscle gain, fat loss, increased confidence, and improved overall vitality [10] [11].

>>Find the best deal for Prime Male here

8. XWERKS Rise – Best Male Testosterone Booster for Libido

Pros

• Straightforward formulation
• Pay in 2 interest-free installments
• No fillers or dyes
• Sugar-free

Cons

• Not a very comprehensive T-boosting blend

Overview

XWERKS offers science-based supplements to optimize performance and health. Rise, with tongkat ali, shilajit, and zinc, is well-suited for supporting erectile dysfunction and low libido by enhancing male sexual function and boosting vital testosterone production.

Dosage

• 2 capsules daily

Pricing

• 1 month: $49 or $46.55 for subscribers

User Testimonials

While one reviewer appreciated the product’s effectiveness on the official page, they found the high volume of daily emails disruptive to their experience. Another user, after 30 days, noted increased energy and better sleep. Jason, a fan of the product, praised its boost to energy and performance but strongly advised taking it with food to avoid discomfort [12].

>>Buy XWERKS Rise here

9. Provacyl – Best Testosterone Booster for Males Over 60

Pros

• Try risk-free for 67 days
• Bulk order up to a year’s supply
• Offers a wide range of herbs and amino acids
• Pay in 4 interest-free installments with Sezzle

Cons

• Not vegan-friendly

Overview

This is another T-booster from Leading Edge Health, but targeted at older men with erectile dysfunction. As the best testosterone booster for 50-year-olds or older, Provacyl combines a wide range of amino acids and botanicals to support energy, mood, and cognitive health. Provacyl provides a multi-faceted approach to improving sexual function and overall well-being.

Dosage

• 4 capsules daily

Pricing

• 1 month: $59.95
• 3 months: $154.95
• 6 months: $268.95
• 12 months: $388.95

User Testimonials

While Provacyl’s manufacturer has excellent reviews on Trustpilot, specific product feedback is absent. For more targeted information, consider checking forums like Quora or Reddit [13].

>>Boost your T levels with Provacyl

Understanding the Link Between Testosterone and Erectile Dysfunction

When testosterone levels aren’t quite right, it can sometimes lead to issues like erectile dysfunction (ED). Let’s break down how these two are connected.

The Role of Testosterone in Libido, Erectile Function, and Performance

Testosterone is the main driver behind your libido (sex drive), influencing how often you desire sexual activity. While it doesn’t directly cause an erection, it’s crucial for the series of events that lead to one.

Those events usually affect factors like the sensitivity of tissues and the overall health of blood vessels, including the production of nitric oxide, a key molecule that increases blood flow. When levels are healthy, testosterone supports strong erectile function and overall sexual performance.

Symptoms of Low Testosterone

Low testosterone, often called “Low T,” can show up in several ways that go beyond just sexual issues. These symptoms can slowly creep up, so they’re sometimes overlooked. The common ones include

• Noticeable drop in sex drive
• Feeling less energetic than usual
• Difficulty building muscle or an increase in body fat
• Mood changes like irritability or depression
• General lack of vitality

How Low T Levels May Lead to or Worsen ED

While low testosterone isn’t the only cause of erectile dysfunction, it can certainly contribute to or worsen it. When T levels are low, your desire for sex can decrease significantly, which is a key part of the process.

Low testosterone can also affect the health of your blood vessels and nerves, making it harder for the penis to receive and maintain the necessary blood flow for an erection.

What Are Testosterone Boosters?

Testosterone boosters are a category of dietary supplements designed to naturally increase the body’s production of testosterone. Unlike prescription medications, these boosters typically use a blend of natural ingredients that are believed to support the body’s hormone-making processes.

The goal is to help men improve energy levels, muscle growth, libido, and overall vitality without the direct hormonal intervention of medical treatments.

Why Choose a Supplement Over Medication?

Supplements are often preferred because they aim to work with your body’s natural systems, rather than directly supplying synthetic hormones. This often means they have fewer and less severe potential side effects compared to prescription TRT, which requires strict medical supervision.

Supplements are also generally more accessible, do not require a prescription, and are seen as a less invasive option for those looking to support their T levels or address mild symptoms.

Key Ingredients To Look for in a Testosterone Booster

Here we review the science that backs the benefits of key t-boosting ingredients.

• D-Aspartic Acid: Studies in both humans and rats show that D-aspartic acid (DAA) can boost the release of important hormones: luteinizing hormone (LH) and testosterone [14].

• Fenugreek: Based on a review of four clinical trials, fenugreek extract shows a significant ability to increase testosterone levels in men [15].

• Zinc: Zinc is vital for keeping testosterone levels optimal, which can help reduce inflammation and protect the health of blood vessels in the penis. This ultimately supports improved erectile function and overall male sexual activity [16].

• Ashwagandha: In an 8-week study, participants with lower sexual desire took either 300 mg of ashwagandha or a placebo. The results showed that ashwagandha significantly improved their perceived sexual well-being and increased testosterone levels [17].

• Vitamin D: A study found that men taking 83 μg (3,332 IU) of vitamin D daily for one year saw a significant increase in their total, bioactive, and free testosterone levels [18].

• Tribulus Terrestris: A review of clinical trials suggests that Tribulus terrestris supplementation shows only weak evidence for improving erectile function in men [19].

• Maca Root: In a 12-week double-blind placebo-controlled study, maca supplementation showed an improvement in sexual desire starting after 8 weeks of use [20].

Tips on How To Boost Testosterone Naturally

Want to naturally support your testosterone levels? While supplements can play a part, some of the most powerful changes come from your daily habits. Here are simple, natural ways to help your body produce more testosterone and improve your overall vitality.

• Diet and Nutrition

• • Eat Healthy Fats: Include sources like avocados, nuts, olive oil, and fatty fish.
  • Prioritize Protein: Get enough lean protein from meat, fish, eggs, and legumes.
  • Limit Processed Foods: Cut down on sugar, unhealthy fats, and refined carbs.
  • Ensure Adequate Micronutrients: Focus on foods rich in vitamin D, zinc, and Magnesium.

• Resistance Training

• • Lift Weights: Incorporate heavy lifting exercises like squats, deadlifts, and bench presses.
  • Compound Movements: Focus on exercises that work for multiple muscle groups.
  • Consistent Workouts: Aim for 3-4 strength training sessions per week.

• Stress Management

• • Practice Mindfulness: Try meditation, deep breathing, or yoga to calm your mind.
  • Engage in Hobbies: Dedicate time to activities you enjoy to reduce tension.
  • Limit stressors: Identify and minimize sources of chronic stress in your life.

• Better Sleep:

• • Aim for 7-9 Hours: Prioritize consistent, quality sleep each night.
  • Maintain a Schedule: Go to bed and wake up at roughly the same time daily, even on weekends.
  • Create a Good Environment: Ensure your bedroom is dark, quiet, and cool.

• Avoiding Endocrine Disruptors:
  • Reduce Plastic Use: Limit food and drinks stored in plastic containers, especially when heated.
  • Choose Natural Products: Opt for personal care and cleaning products free from parabens, phthalates, and BPA.
  • Filter Your Water: Reduce exposure to chemicals often found in tap water.

When To See a Doctor

It’s natural for testosterone levels to change as you age, but sometimes they drop too low and can significantly affect your well-being. Knowing when to simply try natural boosters versus when to seek medical help is crucial.

Signs You Might Need Medical Intervention

It might be time to see a healthcare provider if you’re experiencing persistent and bothersome symptoms like

• Significant drop in sex drive
• Ongoing fatigue
• Unexplained weight gain (especially around the belly)
• Loss of muscle mass
• Depression
• Difficulty getting/maintaining erections

These symptoms, especially when severe or impacting your quality of life, could indicate clinically low testosterone levels that require professional evaluation.

Importance of Hormone Testing

You can’t know your exact testosterone levels without getting them tested. If you suspect low T, seeing a doctor for blood tests is the first essential step. These tests measure your total and free testosterone levels, along with other relevant hormones.

The objective data helps your doctor determine if your levels are indeed low. If so, explore the underlying causes and discuss the most appropriate treatment options, whether that’s lifestyle changes, supplements, or medical intervention like TRT.

FAQs

If you’re considering natural testosterone boosters to help with erectile dysfunction (ED), you likely have some important questions. Here, we’ll answer the most common ones in simple terms to help you make an informed decision.

Do Testosterone Pills Help With Erectile Dysfunction?

Yes, testosterone pills can help with erectile dysfunction, especially if your ED is caused by low testosterone levels. However, they are not a guaranteed solution for all types of ED, as ED can have various causes not related to testosterone.

What Ingredients Should I Look for in a Testosterone Booster for ED?

Key ingredients often include D-aspartic acid, fenugreek, ashwagandha, and tongkat ali, which can help optimize natural testosterone. For direct ED support, look for L-arginine (or L-citrulline, which converts to arginine). Essential vitamins and minerals like vitamin D, zinc, and magnesium are also crucial.

How Long Does It Take for Testosterone Boosters To Improve Erectile Function?

You might start noticing subtle improvements in libido or energy within a few weeks, but more significant changes in erectile function often take 1 to 3 months of consistent use. Full benefits typically become more apparent after several months as your body adjusts and testosterone levels gradually optimize.

Can Older Men Benefit From Testosterone Boosters for Erectile Dysfunction?

Yes, older men can often benefit from natural testosterone boosters for erectile dysfunction. These supplements support the body’s remaining capacity to produce testosterone and provide nutrients that enhance blood flow and overall vitality. While they may not fully resolve severe ED caused by other medical conditions, they can often improve symptoms and quality of life.

Best Testosterone Booster for Erectile Dysfunction: Final Take

Hopefully, this guide will help you make an informed decision about the best testosterone booster for erectile dysfunction.

Remember, while the natural decline in testosterone can bring unwelcome changes like fatigue, muscle loss, and ED, there are effective and affordable natural options that may help.

We’ve highlighted top contenders like TestoPrime that can help you regain vitality, boost libido, and improve erectile function. Choosing the right supplement, combined with healthy lifestyle choices, can truly make a difference in your energy, mood, and overall confidence.

But don’t forget to speak with a doctor or a healthcare provider before taking any supplement.

>Find the best price for TestoPrime

References

1. “Michael Macedo Gave TestoPrime 3 Stars. Check out the Full Review.” Trustpilot, https://www.trustpilot.com/reviews/6529b2b6a7bc3aa862b83832. Accessed 6 July 2025.
2. “Yizhak Lin Gave TestoPrime 3 Stars. Check out the Full Review.” Trustpilot, https://www.trustpilot.com/reviews/63b58ec22338b6d417afa48c. Accessed 6 July 2025.
3. “Testosterone Support.” Innerbody Labs, https://shop.innerbody.com/products/testosterone-support. Accessed 6 July 2025.
4. “Check out This Amazon Review of Leading Edge Health Testosil.” Amazon.com, https://www.amazon.com/gp/aw/review/B0CZ7N4XZN/R2WL3CYHK5PGYR. Accessed 6 July 2025.
5. “Check out This Amazon Review of Leading Edge Health Testosil.” Amazon.com, https://www.amazon.com/gp/aw/review/B0CZ7N4XZN/R1P8LJFMEL1XNK. Accessed 6 July 2025.
6. Rafael_Inacio. “Trying to Pick the Top 5 Testosterone Boosters for More Energy and Gains.” Reddit, https://www.reddit.com/. Accessed 6 July 2025.
7. “Brian Gave CrazyBulk 5 Stars. Check out the Full Review.” Trustpilot, https://www.trustpilot.com/reviews/64bbb6dc83b9e8f557f1dd1e. Accessed 6 July 2025.
8. “Check out This Amazon Review of TestoGen: Natural T-Level Supplement for Men, 90 Capsules – Male Enhancement Herbal Blend w/Magnesium, Zinc, Tribulus Terrestris, Horny Goat Weed & More for Stamina, Endurance & Energy Support.” Amazon.com, https://www.amazon.com/gp/aw/review/B07GT5W3WX/R29N8MTR1ODU3O. Accessed 6 July 2025.
9. “Check out This Amazon Review of TestoGen: Natural T-Level Supplement for Men, 90 Capsules – Male Enhancement Herbal Blend w/Magnesium, Zinc, Tribulus Terrestris, Horny Goat Weed & More for Stamina, Endurance & Energy Support.” Amazon.com, https://www.amazon.com/gp/aw/review/B07GT5W3WX/R34H2IQLHL9ZMR. Accessed 6 July 2025.
10. “Check out This Amazon Review of PRIME MALE Vitality – Natural Testosterone Booster for Men Over 30 – Energy, Strength, Libido & Muscle Support – 120 Capsules (30-Day Supply).” Amazon.com, https://www.amazon.com/gp/aw/review/B08VP1YMHW/R2OA1POTT36K7J. Accessed 6 July 2025.
11. “Check out This Amazon Review of PRIME MALE Vitality – Natural Testosterone Booster for Men Over 30 – Energy, Strength, Libido & Muscle Support – 120 Capsules (30-Day Supply).” Amazon.com, https://www.amazon.com/gp/aw/review/B08VP1YMHW/R1B6JDZT22B0KN. Accessed 6 July 2025.
12. “XWERKS Rise.” XWERKS, https://xwerks.com/products/rise. Accessed 6 July 2025.
13. “Leading Edge Health Is Rated ‘Excellent’ with 4.4 / 5 On.” Trustpilot, https://www.trustpilot.com/review/leadingedgehealth.com. Accessed 6 July 2025.
14. Topo, Enza, et al. “The Role and Molecular Mechanism of D-Aspartic Acid in the Release and Synthesis of LH and Testosterone in Humans and Rats.” Reproductive Biology and Endocrinology: RB&E, vol. 7, no. 1, 2009, p. 120, doi:10.1186/1477-7827-7-120.
15. Mansoori, Anahita, et al. “Effect of Fenugreek Extract Supplement on Testosterone Levels in Male: A Meta-Analysis of Clinical Trials.” Phytotherapy Research: PTR, vol. 34, no. 7, 2020, pp. 1550–1555, doi:10.1002/ptr.. 6627.
16. Besong, Elizabeth Enohnyket, et al. “Zinc Improves Sexual Performance and Erectile Function by Preventing Penile Oxidative Injury and Upregulating Circulating Testosterone in Lead-Exposed Rats.” Redox Report: Communications in Free Radical Research, vol. 28, no. 1, 2023, p. 2225675, doi:10.1080/13510002.2023.2225675.
17. Chauhan, Sanjaya, et al. “Effect of Standardized Root Extract of Ashwagandha (Withania Somnifera) on Well-Being and Sexual Performance in Adult Males: A Randomized Controlled Trial.” Health Science Reports, vol. 5, no. 4, 2022, p. e741, doi:10.1002/hsr2.741.
18. Pilz, S., et al. “Effect of Vitamin D Supplementation on Testosterone Levels in Men.” Hormone and Metabolic Research, vol. 43, no. 3, 2011, pp. 223–225, doi:10.1055/s-0030-1269854.
19. Vilar Neto, José de Oliveira, et al. “Effects of Tribulus (Tribulus Terrestris L.) Supplementation on Erectile Dysfunction and Testosterone Levels in Men – A Systematic Review of Clinical Trials.” Nutrients, vol. 17, no. 7, 2025, p. 1275, doi:10.3390/nu17071275.
20. Gonzales, G. F., et al. “Effect of Lepidium Meyenii (MACA) on Sexual Desire and Its Absent Relationship with Serum Testosterone Levels in Adult Healthy Men.” Andrologia, vol. 34, no. 6, 2002, pp. 367–372, doi:10.1046/j.1439-0272.2002.00519.x