Gwyneth Paltrow vows to live on just $29 worth of food for a week as part of a charity challenge - but is already under fire from critics for her 1,000 calorie-per-day menu The 42-year-old mother-of-two tweeted a picture of her $29 grocery shop, which included eggs, vegetables, brown rice and black beans Gwyneth is taking part in the New York City Food Bank Challenge, which aims to raise awareness and funds for the city's food banks The city's weekly food stamp allowance is just $29 per person per week Gwyneth's healthy food choices have already come under fire from critics who claim they contain nowhere near enough calories for a whole week Gwyneth Paltrow has vowed to live on just $29 worth of food for a week, after agreeing to take on a charity challenge aimed at raising awareness and funds for New York's food banks. The 42-year-old mother-of-two, who founded popular lifestyle wesbite Goop, posted a picture of her $29 grocery shop on her Twitter account yesterday afternoon, showcasing a range of healthy options, including a variety of fresh vegetables, some brown rice and some black beans. 'This is what $29 gets you at the grocery store - what families on SNAP (i.e. food stamps) have to live on for a week,' she wrote alongside the image http://i.***************/i/pix/2015/04/10/20/27708D4F00000578-3034212-Food_focused_Actress_turned_lifestyle_guru_Gwyneth_Paltrow_will_-a-9_1428695726912.jpg Unsurprisingly, although the grocery store no doubt offered a wealth of cheaper, yet more unhealthy, food options, lifestyle guru Gwyneth opted to stick to what she knows best, choosing only the healthiest and greenest of ingredients for the challenge. It looks as though Gwyneth might be going for a Mexican theme on at least one of the days of the challenge, including gluten-free tortillas, black beans, and avocado in her food haul - all the makings of a very healthy Mexican-inspired feast. In a second tweet posted yesterday, she said of the challenge: 'We're walking in their shoes to see how far we get.' She then proceeded to nominate popular American chef Roy Choi, tagging him by his Twitter username @RidingShotgunLA. Gwyneth also encouraged her fans to head over to the Food Bank NYC website, take up the challenge themselves, and donate to the cause. There are those, however, who are already criticizing Gwyneth's attempt to experience what living on food stamps is really like; although the actress has vowed to live on just $29 for the week, many suggest that her bizarrely healthy food choices demonstrate just how out of touch she is with the average person.