Victoria Beckham's go-to green drink has been upgraded to give even more health benefits

We always love getting a sneak peek inside celebs' health, beauty and wellness routines, and one product that we've spotted time and time again over the years is dissolvable green powder AG1.

This all-in-one drinkable supplement has been spotted in Gwyneth Paltrow's fridge, and Rita Ora and Victoria Beckham are reportedly also fans (although VB may now have switched over to husband David's own brand of vitamin drink, IM8).

A multivitamin in powder form made up of over 70 different ingredients, AG1 is recommended to be drunk first thing in the morning and claims to support the body in a number of ways, from reducing tiredness to improving skin, hair and nail health. I've taken this in the past and really noticed the benefits – you can read my full review here – but the iconic formula has recently been reformulated to be better than ever.

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Designed to be mixed with water or in a smoothie every day, AG1 claims to offer daily support for energy, hormone function, the immune system and skin, hair and nails. Being in powder form, it's also easier and quicker for the body to absorb than other supplement forms.

Shoppers can buy AG1 as a stand-alone pouch or as a monthly subscription service directly from the AG1 website, with prices starting from £79 a month. Your first purchase getting you a welcome kit that also includes a tin, bottle, scoop and some other extras.

To compete with rival products such as IM8, AG1's new formula now includes five new clinically studied bacterial strains and is shown to increase friendly bacteria in the gut by times 10. Additionally, it also now includes more magnesium, in a tasteless form of that is easy on the gut and well absorbed.

In addition to glowing testimonials from celebrities and health experts – and myself – AG1 has over 50,000 verified five-star reviews online:

"I see a change in my energy, my mood, focus, amount of food needed," one reads.

"First positive effects: I no longer feel tired during the day and I feel focused and concentrated," one shopper called Harry reports.

"I no longer have a constant feeling of being bloated, it's completely gone," a third review reads.

In fact, when I tried out the original formula, I noticed that I had the same amount of energy as I usually would immediately after a cup of coffee, but without the slump that usually comes afterwards. While AG1 doesn't claim to support weight loss (only that it may help to suppress cravings), I found that I was also less hungry throughout the day; I'd fancy my breakfast at 11am instead of 9:30am-10am, and then didn't need to eat again about about 3pm. I even quite liked the taste.

The one major downside to AG1 is the cost; at £79 a month, it's not the cheapest habit to keep up – and experts do recommend being consistent with taking supplements in order to see results. However, IM8 – which I've also tried – is even more expensive, at £89 a month.

A slightly cheaper alternative that could be worth trying instead is Huel Daily Greens, which costs £45 per month or £50 for a one-off purchase.