Introduction
It is important to understand the large role that nutrition plays in a sugar glider’s life.  Sugar gliders are quite capable of living 10 to 15 years in captivity.  The majority of health issues that occur in sugar gliders have been traced back to nutritional improprieties.  Problems that stem from improper diet not always become rapidly apparent.  Many times, these issues build over an extended period of time and actual physical complications become visible only after irreparable damage has occurred.  A responsible approach to providing a proper diet is to verify that a sugar glider’s nutritional needs are being met on a daily basis.  The following text provides an up close look at a sugar glider’s nutritional requirements.

Micronutrients
Sugar gliders require high calcium levels.  Therefore, calcium (a micronutrient) becomes an integral part of the sugar glider’s diet.  Another micronutrient, phosphorus, can inhibit the absorption of calcium into the body.  In order to prevent this, a sugar glider’s diet should present these two micronutrients in a 2:1, calcium to phosphorus ratio.  That means for every one part phosphorus present in their diet, there should be 2 parts calcium included. Supplying lower levels of calcium will result in a calcium deficiency over time.  Calcium deficiencies can be both debilitating and life threatening for a sugar glider. The best way to supply a sugar glider with calcium is to select fruits and vegetables that are rich in calcium and incorporate those into the sugar glider’s diet.  Even still, some calcium supplementation may be required to achieve a proper ratio.  However, the sugar glider’s body more efficiently processes natural sources of calcium.  An accurate listing of the calcium and phosphorus amounts found in many common foods is available through the USDA’s nutritional database. The database can be located at the following links: 

Calcium  http://www.nal.usda.gov/fnic/foodcomp/Data/SR16/wtrank/sr16a301.pdf

Phosphorus  http://www.nal.usda.gov/fnic/foodcomp/Data/SR16/wtrank/sr16a305.pdf

A comparison example of select foods and their calcium to phosphorus ratios can be found at the bottom of this page.

Vitamins
Vitamin D is a necessary component for the proper absorption of calcium.  Sunlight naturally stimulates the body to manufacture vitamin D.  This poses a problem for nocturnal animals like the sugar glider.  Sugar gliders rely heavily upon the nourishment that they receive to supply their bodies with vitamin D.  The most logical solution would seem to be implementing the use of reptile vitamins.  Reptile vitamins generally contain an ample amount of vitamin D, but using them is a bad idea. Reptile vitamins are designed for use in reptiles, not sugar gliders.  The high levels of vitamin D that most reptile vitamins provide will cause vitamin D to build up in the sugar gliders body over time and generate other health issues.  The best way to supply a sugar glider with vitamin D is to select foods that are a good source of vitamin D.  Naturally occurring vitamin D, when found in suitable food sources, is the safest for a sugar glider and the most readily absorbed into its body.

Protein
Currently, American sugar glider diets trend toward supplying only 25% protein and 75% fruits and vegetables.  However, it has been discovered that captive sugar gliders that are fed diets so low in protein tend to display a greater number of incidences directly related to calcium deficiency.  Proteins play an integral role in the absorption of calcium.  Diets that supply a higher ratio of 50% protein sources to 50% fruits and vegetables have been shown to provide a marked decrease in the number of calcium deficiencies that occur in sugar gliders.  Increased protein levels also have been shown to beneficially influence the reproduction process.  In the wild, sugar gliders typically breed during the period of their highest protein consumption.  In captivity, the maintenance of higher protein levels has shown an increase in sugar gliders’ reproductive rates.  During periods of lactation, the female sugar glider’s body uses additional protein.  Therefore, it has been suggested that the female sugar glider’s diet be modified to supply a 60% protein to 40% fruits and vegetables composition throughout lactation.

Insects
Insects are an important part of any sugar glider’s diet.  It has been discovered that sugar gliders in the wild will consume a diet composed almost entirely of insects as long as availability of that food source exists.  Insects are not only a good source of highly digestible protein, but they also provide necessary mental stimulation to captive gliders.  Approximately 20 to 30 extra-large mealworms, or another insect in equivalent proportions, should be fed to each individual glider at a rate of three times per week.  If the glider is overweight, the amount of mealworms should be reduced accordingly.  Be careful to supply insects that are captive raised and of known origin in order to ensure that they are free of harmful pesticides and other potential toxins.

Supplements
More research is now being done on the dietary requirements of captive sugar gliders.  As a result, supplementation is increasing in its popularity.  Many of the most balanced diet regimens are still forced to rely on some form of supplementation in order to meet all of the nutritional goals required by a sugar glider.  Supplementation can be a beneficial part of a proper nutritional regimen provided that three simple rules are followed.  First, never use supplements that are designed for anything other that a sugar glider unless specifically instructed to do so by the diet of choice.  Secondly, never mix and match supplementations.  Use only the exact supplementation that corresponds to the diet that was chosen.  Last, but not least, never over supplement!  To avoid future health complications, use only the precise amount of supplement that the chosen diet calls for.

Red Flagged Food Sources
In order to meet a sugar glider’s nutritional needs and still keep its diet interesting, a variety of different foods are required.  However, some food can be harmful to a sugar glider.  As a responsible owner, it is necessary to be aware of which of these foods can pose a health risk to them.  Some of the things that should never be fed to a sugar glider are quite obvious, such as tea, coffee, and soda.  All three of these items can prove toxic to a sugar glider once ingested.  Other issues can result simply from the improper preparation of their food.  Protein sources such as meat and eggs should never be served raw due to the numerous health issues that could result.  All fruits and vegetables, especially leafy greens, should be thoroughly washed to remove pesticides and to prevent parasitic or bacterial infections from occurring.  Red meat, cottage cheese, avacados, nuts, and sunflower seeds should all be avoided due to their high fat content and/or phosphorus levels, among other potential problems.  Broccoli, brussel sprouts, cauliflower, peas, and turnips are all fine when served in moderation, but have been said to repress thyroid functioning when served too frequently.  Stay away from foods that are high in artificial preservatives and sugar.  Canned foods are a good example of these.  Do not feed sugar gliders peanuts or insects that are raised on corn mash.  Peanuts and these types of insects can contain toxic metabolites, called aflatoxins, which are known to cause liver disease.  Hard foods, such as cat food, can cause an impacted salivary gland condition referred to as “lumpy jaw” and pose a risk for intestinal blockage.  Birdseed and millet are also capable of causing intestinal blockage in sugar gliders.  Fruits and vegetables should be peeled and pitted whenever possible.  Pitting the fruits reduces the risk of choking and prevents the glider from ingesting potentially dangerous toxins contained within the pit or seed.  Peeling both fruits and vegetables aids in removing parasites, bacteria, pesticides, and other toxins that may be present either in or on the skin.  It is also believed that sugar gliders have difficulty processing milk proteins.  They may experience digestive problems, such as diarrhea, from the excessive consumption of dairy products.  Nectar should be served in moderation as well.  Due to its extremely high sugar content, nectar should be served in moderation in an effort to prevent diarrhea or obesity from occurring.  Garlic and members of the onion family, including scallion, chives, leeks, and ransoms, have been found to promote the development of anemia in many domestic animal species and could prove fatal to a sugar glider.  Be sure that these items are not present if baby food is used as a lickable bonding treat.  Finally, never serve your sugar glider insects caught inside or outdoors.  These insects may have been in contact with fertilizers or insecticides and could prove harmful to a sugar glider.  A complete listing of “danger food” is available through the Glider University website. To access this listing, please click the following link: http://www.glideruniversity.org/nutrition/recipes.htm#danger