• To be in the range of 18 and 65 years of age (Exception for 17 year-olds with Birth Certificate and written authorization signed by the parent or legal guardian)
• To weigh more than 110 pounds (50kg)
• To be clinically healthy on the day of donation (no symptoms of fever, pain, etc.)
• To not suffer from any kind of cancer
• Not organ transplanted
• Not be taking drugs
• To not suffer from anemia
• Neither pregnant nor breast feeding women
• No risky sexual behavior
• To not have Hepatitis, Aids, Syphilis, or Chagas
• To be infection free (cavities count as infection)
• Blood pressure equal or more than 90/60 and up to 150/00
• Not have taken antibiotics for the last 7 days
• Not have taken pain killers for the last 3 days
• Not have undergone surgery, had a major accident, mononucleosis, toxoplasmosis, or meningitis in the last 6 months.
• For women: Not to have given birth, had a C-section or an abortion in the last 6 months
• To not have traveled to areas with epidemic out brakes, nor had received any of the following vaccines: Tuberculosis, polio, measles, rubella, mumps, yellow fever, cholera, or influenza.  However, donors who had received tetanus or diphtheria toxoid are accepted.
• Not have ingested alcoholic beverages, narcotics, marijuana, nor any sort of opioids for the last 12 hours. 

• Accutane, Roaccutane (Isotretinoin)
• Avodart (Dutasteride)
• Jalyn, Duodart (Dutasteride / Tamsulosin)
• Propecia (Finasteride)
• Proscar (Finasteride)
• Bovine Insulin
• Anti-platelet drugs
• Antibiotics: Donors taking antibiotics are eligible to donate 24 hours after their last dose
• Blood thinners (such as Coumadin, Heparin, Lovenox, Warfarin)
• Hepatitis B Immunoglobulin 
• Human Growth Hormones
• Un-licensed vaccines (usually linked to research) 
• Diluyentes de la sangre (como Coumadin, heparina, Lovenox, Warfarina)
• Inmunoglobulina de la hepatitis B
• Hormonas de crecimiento derivadas del ser humano
• Vacunas sin licencia (generalmente asociadas con la investigación)

• You must be in good condition to give blood, and meet general requirements
• The intake of iron rich food within the following month is recommended to enable a good hemoglobin level.  i.e.: Plantain, legumes, and meat
• No alcoholic beverages 48 hours’ prior blood donation
• Keep a low fat diet four days’ prior donating
• Not have had body piercings or tattoos in the last 6 months
• If you are undergoing a malaria or acne treatment, you must wait for 6 months before donating
• You must not suffer from a permanent poor blood circulation in any bodily area
• In the event of having suffered from episodes of heavy allergies, wait for at least one month before donating
• In the event of having received any vaccines, wait for at least one month before donating
• In the event of having been at the dentist, wait for at least one week before donating
• Hepatitis B Immunoglobulin
• Human Growth Hormones
• Un-licensed vaccines (usually linked to research) 

• You must attend rested, calmed, clean, and sober
• You must be hydrated and have had a low fat breakfast, two hours’ prior donation
• You must take your usual medication early in the morning
• Show your photo ID to the front desk clerk
• Assistance staff will take your personal information, and the type of donation you will provide, and enter it to a confidential data file
• Health care personnel will go ahead and take a few samples to test your hemoglobin levels, blood type, and whether you suffer from anemia
• A file will be opened with information on your vital signs, donor questionnaire, blood donating consent, and test results
• You will be interviewed and given a general physical assessment
• The information you provide as donor must be honest and in good faith
• You have the right to ask any questions, and be given easy to understand information
• You must confirm whether you understand donation information provided to you 
• If you are in good condition, you will be extracted one unit of blood and taken samples, with sterile material, for infectious disease testing
• You will be given a blood donation certificate  
• The whole process takes less than 35 minutes

After you give blood the body assesses changes occurred, making the needed adjustments for circulation to operate suitably.  Simultaneously, blood production elements will be stimulated until previous donation values are leveled up.

In order to promote the adjustments your body performs, you must:

• Remain calmed
• Wait for those adjustments at least 5 minutes before changing posture
• Enable the closing of puncture site, avoiding frequent friction and removing the Band-Aid after 2 hours.
• Hydrate little by little with 16 ounces of liquids (500 ml) for the first 2 hours
• Not smoke for the next 2 hours
• Not drink alcoholic beverages for 24 hours
• Not perform any intense physical effort for a period of 6 hours.