As my regular readers will know, I am a great fan of green tea and if you want the absolute best for your health then you need Japanese matcha which is a very rare and special green tea. It is full of antioxidants, helps raise energy levels, elevates mood, lowers cholesterol, is anti-ageing, can help with weight loss, help prevent heart disease and can boost your metabolism by up to 40 per cent.

Organic matcha from specialty company Teapigs comes from the renowned Nishio region in Japan, where the tea leaves are grown under cover for the last few weeks to produce the maximum amount of amino acids and the chlorophyll that gives it the green colour. The leaves are then dried and very slowly ground by a granite stone to a very fine powder, which is then packed and sealed immediately to lock in all the nutrients. Just a quarter teaspoon of this bright green powder gives you the same health benefits as equivalent of15 cups of regular green tea and contains 70 times the antioxidants of orange juice, 90 times the beta carotene of spinach plus vitamins A, B and C.

What more can you want? The thing I particularly like about green tea is that it is both energising and calming and because matcha is a fine powder that you mix with hot or cold liquid there is no waste as you have the whole leaf in powder form. Matcha can be drunk like any normal green tea – with hot water – though I prefer to start the day with it on an empty stomach and mix it with juice or a smoothie. It feels odd to be glugging down a green liquid, but the result is worth it. When I am packing for a stint as a speaker on a cruise ship, it’s the first thing into the case!

If you have had an overindulgent Christmas and New Year followed by this debilitating cold weather then that can really impact your health. A simple way to remedy that is to use matcha in a smoothie recipe for breakfast to set you up for the day. This delicious recipe was devised at Jamie Oliver’s Fifteen Restaurant in London

In a blender put the following:

2g (approx 1/2 teaspoon) matcha

1/2 apple

1/4 stick celery

2 sprigs mint

1/2 banana

1/2 pear

Blend and drink- delicious