http://www.bbc.com/sport/formula1/41416402
Hamilton is walking down a path a number of high-profile athletes have already taken.
Tennis stars Venus and Serena Williams both went fully vegan in 2012 and a few months later they combined to win the doubles at the London Olympics. Novak Djokovic has adopted a mostly vegan lifestyle and last year opened a vegan restaurant.
Bournemouth and England footballer Jermain Defoe has also transitioned to veganism after reading that the diet could help the 34-year-old extend his playing career.
There are also several snooker players who are vegans. Like F1 drivers, they have to concentrate and be alert for long periods of time.
"Lewis Hamilton will benefit greatly, especially long term as well. It seems to be that athletes on a plant-based diet are extending their careers a lot longer than people would think. There are people in their 40s, 50s and even 60s doing things that they just shouldn't be able to do.
"It is really good of him to come out about it as well. When you have arguably the best F1 driver in the world advocating it and giving it a go it is great for everyone. He is inspirational and an idol to a lot of people."
The timing of Hamilton's dietary change may not be ideal but there are plenty of high-profile athletes who have successfully transitioned to a vegan diet, thriving even.
And while most studies suggest testosterone levels are lower in vegans than in those on a meat-based diet, research by the British Journal of Cancer suggests a vegan diet actually increases them.
see
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2374537/pdf/83-6691152a.pdf 
