Best supplements for testosterone.

Supplements with evidence for supporting healthy testosterone, most effective when you're correcting a deficiency rather than chasing 'boosts'.

Written to our editorial standards · reviewed against published research· Updated 2 Jun 2026
Each pick is evidence-graded · we don't sell supplements
  1. 1Vitamin D3 + K2StrongSupports mood, immune function, bone health, and calcium routing. Especially valuable indoors or above 40° latitude.5000 IU D3 + 90 mcg K2 · morning · ~$12/mo
  2. 2Magnesium GlycinateStrongBioavailable, gentle, non-laxative magnesium. Supports deep sleep, calms the nervous system, eases muscle tension.400 mg elemental · evening · ~$14/mo
  3. 3Ashwagandha KSM-66StrongA clinically-studied adaptogen that lowers cortisol under chronic stress while preserving daytime alertness.600 mg standardised · evening · ~$17/mo
  4. 4Zinc PicolinateStrongCritical for immune function, testosterone synthesis, taste, and skin health. Most modern diets fall short.15 mg · evening · ~$9/mo
  5. 5Maca RootModeratePeruvian root vegetable studied for libido and energy in both men and women, without affecting hormones directly.3 g powder · morning · ~$18/mo
  6. 6Tongkat AliModerateMalaysian botanical that supports free testosterone, libido, and HPA-axis recovery from stress. Best results in men over 35.400 mg standardised · morning · ~$28/mo
  7. 7Boron GlycinateModerateTrace mineral linked to free testosterone, vitamin D activation, and calcium routing into bone.5 mg · morning · ~$9/mo
  8. 8D-Aspartic AcidModerateA non-essential amino acid concentrated in the pituitary and testes. Stimulates LH and may temporarily raise testosterone.3 g · morning · ~$24/mo
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Common questions

What supplements increase testosterone?
Correcting low vitamin D, zinc and magnesium helps most if you're deficient. Ashwagandha (via lower cortisol), boron, and tongkat ali have supportive evidence; D-aspartic acid's effect is modest and short-lived.
Do testosterone boosters actually work?
Most 'boosters' do little in men with normal levels. The biggest levers are sleep, training, body fat, and fixing deficiencies. Test your level before spending on supplements.

Educational use only, not medical advice. Always consult a qualified clinician before starting supplements, especially if you take medication or are pregnant or nursing.