Researchers contradicted the common idea that probiotic bacteria can strengthen the immune system and correct adverse effects of antibiotics in the intestines, noting that this has never been proven, Xinhua news agency reported.
The study showed that the effect of 11 strains from the most common probiotic bacterial families vary from person to person and may even harm some people.
In the study, volunteers were divided into two groups, and only the first one received a probiotic preparation. The results showed that the degree of colonisation of the probiotic strains varied significantly from person to person.
For some volunteers, probiotic bacteria settled in the large intestine and in the others the bacteria were completely "expelled".
The team showed that it was possible to predict what would happen to the probiotic bacteria in each patient, according to the gene activity in his digestive system.
The researchers wrote that probiotics should not be given to the public but must be personalized to each patient.
The study also found that treatment with probiotics prevented the reintroduction of the microorganisms in the human body into their original form prior to antibiotic treatment.
The White House said in a statement that the US delegation will be headed by Deputy Secretary of State John Sullivan, who will also be joined by US Treasury Secretary Steve Mnuchin, Efe reported.
The US representation will be rounded out with the US ambassador to Israel, David Friedman, and the assistant to the president and special representative for international negotiations, Jason Greenblatt.
The president suggested last week that he might attend the inauguration, but finally decided against it.
Trump promised last December that he would move his country's embassy from Tel Aviv to Jerusalem, a decision in defiance of the international consensus not to recognize any sovereignty over that city until Israelis and Palestinians reach a peace accord.
At present no country has an embassy in Jerusalem, only consulates, because the understanding is that an embassy there would signify a de facto recognition of Israeli sovereignty over the city, whose eastern part is considered by the international community to be Palestinian territory occupied by Israel.
Ever since the US president indicated he would recognize Jerusalem as the capital of Israel and announced that the US embassy would be moved there, Honduras, Romania, Guatemala and the Czech Republic have publicly stated that they would do the same.
Palestinians consider this act a provocation that disqualifies the Trump administration as an honest broker in the Palestinian-Israeli peace process.
Since then the head of the Palestinian National Authority (ANP), Mahmoud Abbas, and other representatives of that organization have refused to meet with the US negotiating team.
US President Donald Trump administration announced on Wednesday that it recognizes Jerusalem as Israel's capital city and the relocation of the US Embassy from Tel Aviv to Jerusalem.
"The Chairperson of the African Union Commission, Moussa Faki Mahamat, notes with deep concern the decision of the United States Government to recognize Jerusalem as the capital of the State of Israel," AU indicated in a statement released on Thursday, Xinhua reported.
According to the statement, the decision "will only increase tensions in the region and beyond and further complicate the search for a solution to the Israeli-Palestinian conflict."
"The Chairperson of the Commission reiterates the solidarity of the African Union with the Palestinian people and its support to their legitimate quest for an independent and sovereign state with East Jerusalem as its capital," the statement added.
The chairperson further called for renewed international efforts to find a just and lasting solution to the conflict, "based on the existence of two States, Israel and Palestine, living side-by-side in peace and security, within the framework of relevant African Union and United Nations pronouncements."
US President Donald Trump's declaration on Wednesday to recognize Jerusalem as Israel's capital drew strong condemnation from the Arab states and the Islamic world, despite Israel hailing the move as "courageous and just decision."
According to senior administration officials, Trump will make the major announcement along with his policy from the White House tonight.
"The President would say that the US government recognises that Jerusalem is the capital of Israel. He views this as recognition of historic reality," a senior administration official told reporters.
"Jerusalem has been capital of Jewish people since ancient times and modern reality that it has been the seat of government, important ministries, its legislature, the Supreme court," the official said, speaking on condition of anonymity.
In taking this action, Trump will fulfill a major campaign promise that has been made by a number of previous presidential candidates, another senior official said.
In his remarks, Trump will also direct the State Department to initiate the process of moving the US embassy from Tel Aviv to Jerusalem.
Noting that finding appropriate land and construction of a new embassy would take at least a couple of years, officials said Trump would continue to give waiver as required by the Congress - for not moving its diplomatic mission to Jerusalem.
Trump's action enjoys broad bipartisan support in the Congress, the official said.
The move, which is being opposed by the countries in the Middle East, is unlikely to have an impact on the two- state solution to the Israel-Palestine conflict, the official said.
"Trump remains committed to achieving a lasting peace agreement between the Palestinians and Israel, and is optimistic that peace can be achieved," the official said, adding that not recognising Jerusalem as capital of Israel has done nothing to achieve peace for more than two decades.
Trump recognises that the specific boundaries of Israeli sovereignty are subject to final status negotiations, the official said.
Trump has decided to go ahead with his plan, ignoring dire warnings from Saudi Arabia's King Salman and Egyptian President Abdel Fattah al-Sisi, one of his closest allies in the Middle East.
Terming it a "dangerous step", Salman cautioned the move will "provoke the feelings of Muslims around the world".
Sisi warned that the move will complicate the situation and "jeopardise the chances of peace in the Middle East".
The international community considers east Jerusalem illegally occupied by Israel and most countries have their embassies in Tel Aviv.
Responding to questions, senior administration officials said the President believed that the move would have no impact on the peace process and the deal is within reach and can be achieved.
Earlier, Trump spoke over phone with a number of leaders in the Middle East to share his decision on Jerusalem, the White House said.
Trump spoke separately with Israel Prime Minister Benjamin Netanyahu, Palestine President Mahmoud Abbas, King Abdullah II of Jordan, Sisi and King Salman.
"This announcement does not change US policy over these specific borders," the senior administration official said, while another official asserted that the President is not taking a decision that affects any of the boundaries and sovereignty.
Trump's anticipated announcement received mixed message from lawmakers.
Senator Ted Cruz described this as a "historical" announcement.
"I strongly encourage and would unequivocally support President Trump formally recognising Jerusalem as Israel's capital and beginning the important process of moving our embassy from Tel Aviv to Jerusalem," he said.
Meanwhile, Senator Bernie Sanders said he was extremely concerned over Trump's plan.
"There's a reason why all past US administrations have avoided making this move, and why leaders from all over the world, including a group of former Israeli ambassadors, have warned Trump against doing it. It would dramatically undermine the prospects for an Israeli-Palestinian peace agreement, and severely, perhaps irreparably, damage the US' ability to broker that peace," Sanders said.
"What the US should be doing now is bringing adversaries in the Middle East together to seek common solutions, not exacerbating tensions in this highly volatile region," he said.
Meanwhile, the State Department warned US embassies around the world to prepare for possible protests and violence and banned travel by government employees and their families to Jerusalem's Old City and the West Bank.