According to the study conducted insufficient amounts of vitamin 'C 'in a male's diet can lead to agglutination(clumping)of sperm.Thus leading to inhibiting maximal movement of the sperm.vitamin C is helpful in a person who smokes and have abundant amounts of abnormally formed sperm.Smoke of cigarettes is absorbed through our lungs and enters our circulatory system.this may happen to an active smoker or a passive smoker(a person who stay in an envoirment where people smoke) Once these toxins reach male's bloodstream they find their passage to the semen and this in turn leads to less than optimal sperm count and their function to fertilize the egg ,they intially become weak and may die before forming a zygote

The research shows that vitamin C helps to neutralize the toxic effects of the smoke from a cigarette on the sperm and make the sperms to stick together (a condition called agglutination)and the fertility is reduced. Vitamin C reduces sperm agglutination,(3) increasing the fertility of men with this condition is reduced. The recommended dietary allowance of vitamin C for an adult males is 60 milligams/day.according to the reserch performed it is said that intake of 200 to 1000 milligrams/day boost the sperm count and their logivity to survive in the passage and stay alive till it fertilizes an egg in the woman's body.
Diet:-- it is good if a male quit the use of tobacco and smoking and have natural food rich in vitamin C most of the citrus fruits contain vitamin Ceven green leafy vegetable have vitamin C present in them .Amla is very rich in vitamin C.The finding have shown that a green chilly contains 7 times more vitamin C than an orange .if you eat seven oranges and just have one chilly it is comparatively same.
Guava is rich in vitamin C -- 1/2 fruit contains 188 mg of vitamin C and 56 calories
1/2 cup of raw red sweet pepper(capsicum) contains 142 mg of vitamin C and 20 calories. If cooked a 1/2 cup pepper provides 116 mg of vitamin C.It could be eaten in salads.
or Green sweet peppers it offer 60 mg of vitamin C in half cup, with low calories of just 15.
Grapefruit juice(mosambi) supplies almost the same amount of vitamin C as we get in green peppers that is 3/4 cup has 50 to 70 mg of vitamin C and 71 to 86 calories.
Strawberries are rich in fiber and are antioxidants in nature, they have vitamin C.
Brussels sprouts:--This veggie is packed with both 48 mg of vitamin C, and vitamin K and just small amount of calories.
cantaloupe has vitamin C
Kiwi fruit is rich in vitamin C too. One medium kiwi contains 70 mg of the nutrient and 46 calories.
One orange may contains 70 mg of vitamin C and 62 calories you can have orange juice it you want in undiluted form
Here is a great myth :---
Women should avoid mega doses of vitamin C because it can dry up cervical fluid i them, preventing the sperm from reaching the egg and finally becoming a zygote. Limit the intake to the dose included in your prenatal vitamin.
Vitamin E is said to be an essential vitamin for fertility and reproduction.The potent antioxidant plays important part in mens' sperm production.Research shows that lack of vitamin E inhibits the formation of sperms.If the vitamin E level is low it can cause a decline in the formation of important sex hormones and enzymes which are responsible for producing sperm .
fertility in men improves due to protective effect of vitamin E on the sperm cell membranes. Supplement of Vitamin E may also aid in improving sperm's motility or death before fertilizing the egg in the female body.The required Dose is 400 IU regularly.
the food rich in vitamin E :- Fortified and ready to eat cereals will give you 1.6 to 12.8 mg of vitamin E per/bowl serving.
1 ounce of roasted sunflower seeds provide 7.4 mg of vitamin E and 165 calories to us. Sunflower oil is also a good source for vitamin E so we can use it for cooking to get benefited.
Almonds too provides 7.3 mg of vitamin E and 164 calories per ounce.

Hazelnuts provides 4.3 mg of vitamin E and 178 calories per ounce. Mixed dry nuts provide 3.1 mg of vitamin E and 168 calories per ounce. and peanuts too provide 2.2 mg of vitamin E and 166 calories per ounce. they are also rich in other nutrient.
One tbsp of cottonseed oil provides 4.8 mg of vitamin E
A half cup of turnip greens has 2.9 mg of vitamin E and just 24 calories.
The greens on turnip are just as edible as they are nutritious. In addition to Vitamin E, a 1/2 a cup of turnip greens(leaves) have 441 mg of vitamin A which is present in the form of beta carotene and also is enriched with Vitamin C, folate, Vitamin K and calcium .they're much more nutritious than the turnip root.One can have young soft crunchy leaves as a salad, Even mustard greens and dandelion greens are rich in these nutrients and provide similar benefits
A half cup of tomato paste has 5.6 mg of vitamin E and 108 calories even tomato puree provides same benefits.
Peanut butter have 2.5 mg of vitamin E and 192 calories per two tbsps
1/2 avocado consists 2.1 mg of vitamin E and 161 calories

Selenium:--
A study published in the Journal Science states that a diet low in selenium could be a big cause of male infertility. Selenium helps prevent oxidation of the sperm cell and thus aiding in maintaining sperm cell integrity. Good sources of selenium is red meat, liver and seafood. The recommended dietary allowance for selenium is 70 micrograms per day for an adult male.one specific sea food that may enhance fertility is an oyster.Its has abundant amount of zinc. and it is said that adequate amount of zinc is important for maintaining optimum volume of semen and blood testosterone levels in men.

Zinc:--is involved in over 200 proteins and enzymes and is important to raise male fertility. Zinc is also involved in the activation of the key sperm enzymes in the males, and moves into the prostate with the help of testosterone. shortage of zinc leads to lowering of testosterone level, It shrinks testicle size and produces unhealthy sperms,Upon restoring a daily dose of 15 milligrams, the testosterone and the sperm count levels rebounds to a reasonably acceptable levels within a year. Take zinc with a full glass of water.have multivitamins with zinc ask your doctor once you get a good idea after reading this article and also help your self with the nutritative food so that you can over come your problem of infertility in men .

Added new findings:--

Strengthening the sperm count of the male:

Take linseed along with black pepper and honey to increase the sexual potency of a male and cure the seminal problems.