I met one of the world's foremost sleep researchers and experts, Matthew Walker at his Airbnb in London when he was over recently. Ironically, his rented flat was opposite Tiger Tiger which closes at 4am. So the world’s top sleep guru hadn’t had a great night’s sleep.

It was the perfect chance for him to talk me through his own sleep schedule, as well as look at other important sleep issues including;

• The best time to go to sleep

• The optimum way to prepare in the final hour before bed

• The perils of bad sleep (frankly terrifying)

• How to deal with insomnia

• Sleep tips for parents (I need these)

• The importance of bright light exposure.

• The truth about sunglasses (surprising - if you are a sunglasses wearer make sure you listen)

• Getting the temperature right in your bedroom. (Clue - the older you get, the cooler it needs to be.)

I’m sure that after listening to this you’ll change more than one thing about your bedtime routine. And if you enjoy it, perhaps you’ll share it with someone else you know who could do with a better night’s sleep.

Is a Carnivore diet good for you? Is it sustainable? Would it destroy the environment, even if it is helpful for you and your health?

Joining me is the man who eats liver, duck eggs and cooked fat for breakfast

And he has salad in his name, yet doesn't touch it.

Top Salad-dodger Paul Saladino of the foremost names in the carnivore community

He was trained at the University of Arizona with a focus on Integrative Medicine, obtaining his M.D. in 2015. He is a certified Functional Medicine practitioner (IFMCP) through the Institute for Functional Medicine. 

I'm not spiritual. Should I be? It's a dilemma. I feel connected to the world, to others, perhaps even to a higher purpose. But I struggle to describe myself as spiritual. Maybe Martina Coogan could help.

Do we need to be spiritual to live a good life? Is it even worth thinking about such higher concepts?

Martina Coogan runs the Modern Mystery School here in London. They run huge seminars and workshops all focused on spiritual awareness and personal empowerment. She has taught in Ireland, England, Sweden, Turkey, USA, Canada, Singapore, South Africa and the Middle East.

Over the years, through her healings and teachings, Martina has enabled many people to rediscover and remember their true selves. She has reignited the spark within many, and empowered them to live their lives with love and joy, striving to achieve their highest and truest potential.

It's another ZestHacks episode, featuring the world’s cleanest vodka, an update on the Footpads we spoke about last week, zero drop footwear that my feet love (this is an ongoing quest), the top clean sunscreen, a great way to cook healthy with my top gadget currently, and an eco-friendly clothing brand we love.

Starting with the vodka. The idea is that the less impurities in an alcohol, the less likely you are to react to it. In other words, the less likely it is to give you a stinking hangover. And I am unfortunately Mr Sensitive these days when it comes to booze. But I might have cracked it with my new fave voddie. Listen on to find out more.

Health hacks, biohacks and life hacks coming up including:

Footpads that draw the toxins out of your feet, and the amazing story around this.

Amber necklaces and the history and power behind them (i am sceptical of these!)

Meditation and how it dramatically reduces your pulse rate

What happens when poker players don't trust their instinct?

And lots more.

As always it was brilliant to chat with friend of the show Dr. Stephen Simpson.