Shopping list and life style changes :

Natural testosterone boosters:

Ashwagandha
Vitamin D from Sun preferably
Maca
Creatine
Oysters
Avoid BPA
Caffeine
Avoid chlorine
Avoid Flouride
Tongak Ali
Heavy SQUADS training
Sleep 8h minimum.
No soy products
Reduce carbs and sugars by 50%
100mts sprints all out
Boron
Magnesium
Fish oil
Fenugreek
Tribulus
Testro
Garlic
Vit C
Choline , alpha GPC
DHA
L-Carnetine
L-Argenine
Zinc
Selenium

Claims are: Science based research conclusion.

Sources:

Pubmed, Ben Greenfield, Bulletproof executive, Examine.com, Suppervisity.com, journal of sport and medicine.