More good news for people who can't function in the morning without a cup of coffee.

Researchers from the University of South Florida and University of Miami have found that higher caffeine consumption -- a big source being coffee -- is linked with a delayed onset of Alzheimer's disease, even in older adults who already have mild cognitive impairment (thought to be an early sign of Alzheimer's and/or dementia).

"These intriguing results suggest that older adults with mild memory impairment who drink moderate levels of coffee -- about 3 cups a day -- will not convert to Alzheimer's disease -- or at least will experience a substantial delay before converting to Alzheimer's," study researcher Dr. Chuanhai Cao, a neuroscientist at USF, said in a statement.

Researchers conducted the study, published in the Journal of Alzheimer's Disease, on 124 people ages 65 to 88; some of the study participants had mild cognitive impairment.

They found that the study participants who went on to develop dementia over the next two to four years had 51 percent lower blood caffeine levels than people whose MCI did not progress over that period of time. The researchers said that high blood caffeine levels were a sign that a person regularly consumed caffeine.

Researchers cautioned that the study doesn't mean drinking coffee is guaranteed to save someone from Alzheimer's, but rather coffee may help to lower the risk of Alzheimer's.

And of course, there is such thing as too much of a good thing -- and it's important to drink coffee in moderation. Excessive coffee consumption is associated with cardiovascular problems, including an increased heart rate or blood pressure and irregular heartbeats, Harvard Health Publications reports. And all that caffeine can become addictive. Experts tend to agree that the good largely outweighs the bad for most people, but remember to consume in moderation (and skip calorie-heavy add-ins like sugar and cream).

For more health benefits of coffee, click through the slideshow:

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  • Coffee (Or At Least, The Caffeine!) Can Help You Proofread Better

    The caffeine in coffee could actually help you to <a href="http://psycnet.apa.org/psycinfo/2011-23154-001/" target="_hplink">spot grammatical errors</a>, according to a new study in the <em>Journal of Experimental Psychology</em>. Researchers found that <a href="http://bodyodd.msnbc.msn.com/_news/2011/10/26/8498728-tank-up-on-java-unleash-your-inner-editor-says-study?ocid=twitter" target="_hplink">caffeine helped students to correct errors</a> in subject-verb agreement and verb tense, MSNBC reported. However, the caffeine still didn't seem to make a difference at identifying misspelled words -- sorry.

  • Coffee Could Lower Women's Depression Risk

    Women who drink a few cups of <a href="http://www.huffingtonpost.com/2011/09/27/coffee-cuts-depression-women_n_982122.html" target="_hplink">caffeinated coffee have a lower risk of depression</a> than women who don't drink any coffee, according to a Harvard study. That research, published in the <em>Archives of Internal Medicine</em>, shows that women who drink two to three cups of coffee a day have a 15 percent lower risk, while women who drink four or more cups of coffee a day have a 20 percent lower risk. Study research Dr. Albert Ascherio <a href="http://www.huffingtonpost.com/2011/09/27/coffee-cuts-depression-women_n_982122.html" target="_hplink">told HuffPost</a> earlier that "caffeine is known to affect the brain," because it "modulates the release of mood transmitters." "I'm not saying we're on the path to discovering a new way to prevent depression," he said. "But I think you can be reassured that if you are drinking coffee, it is coming out as a positive thing."

  • Coffee Could Save Your Brain

    ... Well, maybe. A study in the <em>Journal of Alzheimer's Disease</em> suggests that there's something in coffee -- though researchers have yet to determine what exactly that "something" is -- interacts with caffeine to boost the levels of granulocyte colony stimulating factor (GCSF), a growth factor that seems to be able to <a href="http://www.huffingtonpost.com/2011/06/24/coffee-could-ward-alzheimers_n_882931.html" target="_hplink">fight off Alzheimer's disease in mice</a>. The amount of coffee needed in the study is equivalent to about four or five cups of coffee for humans. Researchers said <a href="http://www.j-alz.com/press/2011/20110621.html" target="_hplink">GCSF likely has this effect</a> because it causes stem cells in the bone marrow to come into the brain and remove the beta-amyloid plaques associated with Alzheimer's disease. It also has a role in forming brain cell connections and creating new brain neurons, researchers said.

  • Coffee Could Lower Men's Prostate Cancer Risk

    A Harvard School of Public Health study shows that men who drink six cups of coffee a day have a 60 percent decreased <a href="http://www.huffingtonpost.com/2011/05/18/coffee-can-cut-prostate-c_n_863472.html" target="_hplink">chance of developing a dangerous form of prostate cancer</a>, as well as a 20 percent decreased chance of developing any other kinds of prostate cancer. The study, published in the <em>Journal of the National Cancer Institute</em>, also shows that just <a href="http://jnci.oxfordjournals.org/content/early/2011/05/17/jnci.djr151.abstract" target="_hplink">drinking just some coffee a day</a> -- just one to three cups -- could still cut prostate cancer risk by 30 percent.

  • Coffee Could Ward Off The World's Most Common Cancer

    New research presented at the American Association for Cancer Research conference shows that coffee could help to <a href="http://www.huffingtonpost.com/2011/10/24/coffee-most-common-cancer_n_1025089.html" target="_hplink">ward off basal cell carcinoma</a>, the most common cancer in the world. Researchers from Brigham and Women's Hospital and Harvard Medical School found that women who drink three or more cups of caffeinated coffee a day have a 20 percent lower risk of the skin cancer, while men had a 9 percent lower risk. Decaf coffee didn't seem to have the same protective effect -- so "our study shows that the inverse association with BCC appears due to caffeine, not other components in the coffee consumption," study researcher Fengju Song, Ph.D., earlier <a href="http://www.huffingtonpost.com/2011/10/24/coffee-most-common-cancer_n_1025089.html" target="_hplink">told HuffPost</a>.

  • Coffee Could Protect You From Type 2 Diabetes

    Drinking coffee is associated with a <a href="http://archinte.ama-assn.org/cgi/content/abstract/169/22/2053" target="_hplink">lower Type 2 diabetes risk</a>, with more coffee consumption linked to a greater decrease in risk, according to an <em>Archives of Internal Medicine</em> review of studies from 2009. In that review, researchers looked at data from more than 450,000 people in 18 studies, and found that for every extra cup of coffee drank a day, a person's risk of Type 2 diabetes decreased by 7 percent. However, researchers cautioned that "the putative <a href="http://archinte.ama-assn.org/cgi/content/abstract/169/22/2053" target="_hplink">protective effects of these beverages</a> warrant further investigation in randomized trials."

  • Coffee Could Decrease Parkinson's Risk

    Drinking <a href="http://www.ncbi.nlm.nih.gov/pubmed/20182023" target="_hplink">a few cups of coffee a day</a> could lower the risk of developing Parkinson's disease by as much as 25 percent, according to a study published last year in the <em>Journal of Alzheimer's Disease</em>. In that review of studies, which was published in the <em>Journal of Alzheimer's Disease</em>, researchers examined 26 studies that involved 125,000 British people, to find that <a href="http://www.telegraph.co.uk/health/healthnews/7815087/Coffee-can-cut-chances-of-developing-Parkinsons-disease-according-to-new-research.html" target="_hplink">two or three cups of coffee</a> seemed to have the optimal effect, <em>The Telegraph</em> reported.

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