Vitamins in high dosages have been know to cause toxicity! This is a guide to the values known for this of them vitamins mentioned:-
VITAMIN A - More than 50,000IU daily, if taken for many months
can produce toxic effects in adults.
The Vitamin A will help prevent the Vitamin C from Oxidising along with its immune function aiding, shortening disease durations and increasing T-Cells.
VITAMIN C - Over 10,000mg daily can cause diarrhea, skin rashes
& excessing peeing.
The Vitamin C is used to prevent Nitrosamine the cancer causers. It is used for its high free-radical scavenging, aid the immune system & offers protections against many forms of cancer. Stops many bacterial and viral infections.
SELENIUM - 2400mcg have produced toxicity but dont go over
300mcg generally. Effects are garlicy breathe
yellowish skin, brittle nails & gastrointestinal
disorders.
Selenium increases the immune system and add electrons which destroys the free-radicals. Its well known to fight cancer. It helps produce Glutathione peroxidase the number one anti oxidant in every cell.
ZINC - 1000mg can cause gastrointestinal disorders,
copper deficiency & immune system disfunction.
Zinc helps with the production of SOD natural anti-oxidant. Help maintain a balanced Acid/Alkaline body which is important. Helps with the DNA synthesis, accelerates healing, promotes growth
B17 as Amygdalin or Laetrile is not toxic in large dosages like taking B17 straight from seeds.
Please check on Hydrazine Sulphate