Holland & Barrett, the UK's biggest health food retailer, is reportedly to be bought by a Russian billionaire for £1.8bn.
Private equity firm Carlyle acquired Nature's Bounty, including Holland & Barrett, in 2010 for $3.8 billion.
"We believe that the company is well-positioned to benefit from structural growth in the growing £10bn health and wellness market and has multiple levers for long-term growth and value creation".
It is headquartered in Nuneaton, Warwickshire, and has stores in 1,150 locations worldwide and more than 4,200 associates and staff.
Holland & Barrett, whose products range from vitamins and homeopathic remedies to "free from" foods for allergy sufferers, says it has grown same-store sales for 32 consecutive quarters, with revenues topping 610 million pounds in 2016.
"We will create a board that features the best possible combination of skills to support the leadership team and take Holland & Barrett to the next level", he said.
Mr Aldis said: "We have upgraded much of our core store portfolio to concept stores to deliver additional in-store theatre and increased customer engagement. We look forward to building on this track record as we enter the next chapter with L1 Retail".
L1 Retail is the retail investment arm of LetterOne.
Latham is advising Carlyle with a team led by London corporate partner Mike Bond, while L1 Retail is being advised by fellow United States firm Jones Day.
They are joined by Clive Humby, co-founder of customer data company Dunnhumby.