Unexpected pregnancy, halted periods, hair loss, leg cramps, nausea, rash and a general feeling of coldness.
Meet the possible side effects of Australia's new fad diet, as listed on its own website: the Cambridge Weight Plan. Around 10,000 people in Australia have already used it, the company says, some to spectacular effect. Lisa Dow (pictured) lost more than half her body weight using the diet.
But a government regulator is now investigating whether the product can be legally sold in Australia.
And the diet is so low in nutrients it has been described as "dangerous" by a health professional, and falls below recognised non-binding international standards for low-calorie diets. 
A spokesman for Cambridge said the diet was perfectly safe, scientifically validated, and has helped thousands of Australians.
"In more than 30 years of trading Cambridge Weight Plan have never had a customer experience a serious side effect," the spokesman said. He said the side effects were "not long-lasting and do not have a long-term effect".
A packet full of calories
The Cambridge Weight Plan was brought to Australia in 2012 by two Greek-Australians, who had already had significant success selling the diet in Cyprus.
But the diet is much older than that. The Plan is the result of research originally conducted in England in the late 60s and early 70s, and followed up by a Polish scientist in Poznan.
It works in six stages.
The first is the most severe: dieters reduce their intake to 440 calories a day. The Tony Ferguson Very Low Calorie Diet, by comparison, prescribes 800 calories a day, Optifast 600-800.
A day on Cambridge's first stage is typically made up of three servings of the Diet's shakes, soups, porridges and chocolate bars.
"Some people are terrified, but only the first three days are the worst," the diet's inventor professor Alan Howard said in an interview published by Cambridge. Now aged in his 70s, Mr Howard still consumes the diet's shakes and soups every day.
"Then the body enters into a state triggered by chemical reactions which totally reduces the feeling of hunger. It is similar to being euphoric after having one drink. People who diet talk, laugh, are happy.
But going down that low is "a really bad idea", says Tania Ferraretto, a practicing dietician and spokesperson for the Dieticians Association of Australia, who was speaking in a personal capacity.
"There's absolutely no evidence for this diet. It's dangerous. We don't want people eating less than 600 calories a day, that's not enough food."
Diets like Cambridge are attractive because of the rapid weight loss they bring in the first few days. But that was all water-weight, not fat, Ms Ferraretto said.
Cambridge's shakes and soups - $4.30 a packet. Photo: Cambridge Weight Plan
An investigation
Women of average height eat three soups or shakes - made out of packets sold by Cambridge - a day.
That totals about 43 grams of carbohydrate and 43 grams of protein per day; below the minimum 50 grams of each required by the United Nations international standards.
Those standards are non-binding in Australia, but the Weight Management Council of Australia (of which Cambridge is not a member) advises that any very-low-calorie-diet sold should meet them.
A spokesman for Cambridge said the company chose not to follow those standards because "CWP products are not foods for special medical purposes".
A EU scientific report handed to the commission in 2015 recommended total diet replacements offer no fewer than 600 calories a day.
There are also questions about whether Cambridge meets Australian standards. Formulated meal replacement products are required to have at least 200 calories a serving under Australian law, a number Cambridge's products do not come close to meeting.
A spokesman for the Department of Health & Human Services confirmed the agency was investigating Cambridge's products to "assess their compliance" with those standards.
A Cambridge spokesman said the program was a total diet replacement, not a formulated meal replacement, and as such was not regulated by those standards. There are no binding standards for total replacement diets in Australia.
The cost of a few calories
While Cambridge cuts the calories, it is no cut-price diet. Expect to spend more than $400 a month on the program.
Each Cambridge dieter who signs up gets assigned a personal consultant, who works one-on-one with the client. Their doctor is also notified that their patient has begun the program.
The meal replacements cannot be bought at other retailers - they are only available through the consultants, effectively locking in dieters.
To become a consultant, another consultant needs to sponsor you. They work as a business mentor - while also getting a "fee for monitoring, conducting regular appraisals and surveying their clients," the spokeswoman confirmed.
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