Every single time she sells a product, an alert pings on Lucy Goff's phone, updating her customer list. What a roll call! We already know that Gwyneth Paltrow is a fan of Lucy's eye-wateringly expensive skincare and supplement brand.
So too are Jennifer Lopez, Victoria Beckham, Meghan Markle, Kim Kardashian and Kate Hudson.
But let's not be sexist here. Does she have high-profile male celebrity customers on that list, I ask, thinking I might tease out a George Clooney-esque confession?
'Oh yes. You'd be amazed at the names. There are world leaders on there – although I'm not sure that's much of a benchmark at the moment, given the state the world is in.'
Hold on. There are presidents and prime ministers buying £500-a-pop skincare solutions from this mother-of-two from Leeds?
Lucy Goff's company Lyma Life, has been quietly doubling its sales every year since 2018
Victoria Beckham is a fan of Lucy's eye-wateringly expensive skincare and supplement brand
She nods. 'These are people at the top of their world-leading game,' she confirms.
What people? President Biden? She can't possibly say. Putin? She purses her lips (plump; line-free). I feel a little queasy.
Fans say that consistent use of her products leaves them not just with dazzlingly dewy skin, but with almost super-human energy.
Do we really need a super-charged Putin feeling like he's a teenager again? 'It's OK,' she reassures me. 'We don't ship to Russia.'
Little wonder Lucy, who is 50 (but looks 38, tops) says she wants to pinch herself.
Her company, Lyma Life, has been quietly doubling its sales every year since 2018 (it has been ranked the 11th-fastest growing business in Britain in today's Sunday Times), after being endorsed by a whole host of A-listers.
And having been sold in Harrods and Harvey Nichols, it now appears to have gained a foothold in the mainstream market.
Last week it was reported that the latest product – a serum and skin cream combo, which will cost (eek!) £495 for just 100ml – has attracted a waiting list of 30,000, despite the horror price tag.
Lyma devotees have already proved themselves ready to fork out £5,000 a year for a single supply of upmarket supplements, which come in a hammered copper vessel (rather than in the plastic pots you might pick up in Boots) and almost £2,000 for a laser skincare system, which can be used at home as you watch television.
Sales last year surpassed £24 million.
Lucy herself is attracting quite a following, so the idea of her as Britain's very own Gwynnie is plausible.
When I am granted an audience with her she kicks off by citing her own version of one of Paltrow's films as a pivotal moment.
'My Sliding Doors moment came when I was in Geneva, recovering from being so ill after having my daughter that I thought I would die.
'I met a professor of longevity – I didn't even really know what that was – who said he would send me some supplements. In three or four weeks, my life had changed.'
It was her mother who had whisked her off to Geneva, reportedly to a spa, to recuperate after she nearly died following the birth of her first child.
Gwyneth Paltrow has also been won over by the burgeoning skincare and supplement brand
Sales for Lucy Goff's luxury beauty company, Lyma Skincare, last year surpassed £24 million
'It wasn't a spa, more of a clinic, and my mum had exhausted all other options trying to help,' she corrects me.
Popping to a Geneva clinic wasn't a normal thing in your family?
'Oh no. My mum is a down-to-earth M&S woman, but when you see your daughter at death's door and all these physicians say there is nothing they can do, you will do anything.'
She had clearly suffered a serious trauma, developing septicaemia after her daughter Zarah was born in one of London's leading private hospitals in 2012.
'The whole birth was traumatic. I'd had pre-eclampsia and it was an emergency.
'They tried to give an epidural, but it didn't work so I had a general, but when the baby came out she was floppy. I didn't even see her for 24 hours and was at the point of thinking, 'Is my baby even alive? Are they lying to me?' '
She was convinced there was something wrong with herself afterwards – 'I felt so bad I thought I was going to die. I thought I'd never leave hospital' – but was discharged and told there was nothing wrong.
Shortly after she was rushed to A&E, though, where septicaemia was confirmed.
'I would have died if I hadn't got antibiotics,' she says. Her life may have been saved, but she was not out of the woods.
In the weeks afterwards she was so low on energy that she could barely hold her baby.
'It's hard to describe but my brain just wasn't stable,' she recalls. 'I felt permanently on the verge of collapse.'
Some of us might have just concluded this was simply motherhood, but, in Geneva, her encounter with Professor Paul Clayton, an expert on degenerative disease, changed everything.
He sent her a 'protocol' of supplements which had her bouncing with energy within weeks.
Not only did she feel herself again, but her hair was shining and her skin was smooth. Friends kept asking her if she'd had 'work'.
READ MORE: The British well-being guru who charges £500 for face cream...and believe it or not she has a waiting list of 30,000
<!- - ad: https://mads.dailymail.co.uk/v8/us/femail/none/article/other/mpu_factbox.html?id=mpu_factbox_1 - ->AdvertisementWhether you believe the science or not – the jury is still out on that – it's simply astonishing that a woman with no scientific qualifications, and no real experience of the business world (she had worked in public relations) could have built an empire from this point.
Lucy says even her mum, who has always been her greatest supporter, finds it hilarious.
'I left school with two Es – in geography and home economics, so I could identify a cumulus cloud and make a roux sauce. That's it.'
She was dyslexic, so perhaps formal academic success was going to be tricky, but was there any hint of entrepreneurial zeal at school? She laughs.
'At careers fairs, everyone else was being told, 'Oh, be a doctor or a solicitor,' but when it got to me they said it was doubtful if I'd even get in to secretarial college.
'They did actually say to me – 'Lucy, you're going to have to marry well.' '
She and her husband, Simon, who had experience with tech companies, remortgaged their London home to start Lyma Life, going into partnership first with Professor Clayton, then other doctors who work in the field of degenerative disease and preventative care.
Where did the name come from? 'Lyma means 'the origin' or 'the source' in ancient Greek, and that kind of struck me because we were using ingredients that were sourced from thousands of years ago.'
The business philosophy was bang up to date, though. She cites the beauty entrepreneur Jo Malone as an inspiration.
'She took a functional item, a candle, and turned it into a lifestyle statement for the home. Adding that 'brand' element was essential.'
Other influences were 'Tom Ford, Apple and Nike – all lifestyle brands'. So hello Lyma – not simply a load of vitamins and supplements in a pot, but a lifestyle choice.
This was where Lucy's PR background proved perhaps the key ingredient. She had worked with department stores so had experience of the luxury market.
She also understood the power of celebrity, so when Lyma supplements were first launched, they were sent to various famous women to try.
The first social media endorsement ('and no, we didn't pay her') came from singer Ellie Goulding.
As soon as Goulding raved about how wonderful the product was, they were inundated with people asking to be part of the Lyma experience.
The first product was the supplements, but then came some exciting news from Germany, where Dr Clayton had been observing the effects of low-level laser treatments in elderly patients.
'They'd been using it to rebuild cartilage, but while the other doctors were looking at X-rays, he was struck by the skin on the man's knees. On the one that had been treated, it looked 20 years younger.'
Lucy sat up. Within months she was trying out a hand-held laser torch herself on her knees. 'They looked like a 90-year-old's knees. I'd sit at night, using the laser on them.
After a month I thought 'Is this working?' but after eight weeks, I compared pictures and, oh my God, I looked like I'd had a knee lift. I'd found our next product.'
She is almost evangelical about this laser. 'I knew we had the power to transform the whole industry.'
What industry, though? This is a relatively new world, straddling the health supplement industry, the cosmetic industry and the almighty lifestyle brand.
The company literature strives to distance Lyma from traditional supplements, stressing the 'science'.
There is much talk of things like 'epigenetic breakthroughs' and 'bioavailability'. The supplements include things such as turmeric extract, Vitamin D, Smart Nootropic (said to improve cognitive function) and ashwagandha root, commonly used to combat stress. Is this piffle?
Well there is peer-reviewed research to suggest that some of these supplements do have health benefits, but little to back up claims.
The skincare industry is much more highly regulated than the supplement one, though, and a research paper into this side will be published later this year.
Preliminary findings on Lyma products' efficacy have delighted Lucy. 'It works! It works!' she says. 'It's in a completely different league to anything else out there.'
Whatever, you can see why customers – especially perimenopausal women, the core target – are tempted. The promise of sleep, calm AND glossy skin?
Take my credit card now. But isn't this exploitative?
'It would be if it didn't work,' says Lucy. But her own lifestyle suggests that the Lyma experience is not a quick route to being on top of your own life.
For her well-being is a much wider concept. She rises to warm water with a slice of lemon and then heads to the gym.
She eats a non-processed food diet, rarely drinks alcohol, likes to sit cross-legged and be at one with her thoughts.
Gwynnie could probably come and stay and feel quite at home, I imagine.
Has she met Gwynnie. Meghan et al? 'I've met a lot of people,' she smiles.
Is the celeb skin as good up close? 'I think Gwyneth looks absolutely amazing.'
We love Gywnnie, but she can seem smug. Lucy insists her feet are definitely on the ground.
'I'm from Leeds, for crying out loud. You can't get more real. Anyway, I don't think it is smug because what I'm saying is all this is hard work. If you want to be super-human, you also have to pay attention to your diet, to exercise, sleep.'
In the midst of building a business empire, Lucy had a second child, this time by IVF.
Zach has just turned one, but Lucy has spent the first year of his life jet-setting across the Atlantic to build her brand.
Yes, she knows about working parent guilt. Her own miracle products may help her live her high-octane life, but there are limits.
'They don't look after the children,' she says.
When she does launch the product that will sort out childcare as well as crepey necks, world domination will be hers.
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