Multi vitamin, fish oil, gingko biloba and l-theanine. Would these supplments be good for me?

Supplements. If you're not eating a balanced diet then a multivite might offer you some benefit. The fish oil, gingko et al have proven benefits across the board so 'good for me' can't be answered with any confidence.

Related Questions

Is eating 100g parsnip, carrots, sweetcorn, asparagus, broccoli, banana, multi-vitamin and fish oil supplement a day enough to live a healthy life?

Nutrition. In order to have a healthy diet, yours is lacking protein and variety for that matter. Make sure not to forget to exercise in order "to live a healthy life". Read more...
Many components to. health. Eat healthfully w at least 5 servings of vegetables & 4 of fruit /day (organic is best). Increase nutritional fiber. Avoid refined sugar & junk carbohydrates. Avoid sweetened juices, soda & caffeinated beverages. Watch portion sizes. No tobacco, illicit drugs & low to no alcohol use. Aim for 7.5 to 8 hrs sleep /night. Hydrate w at least 64 oz of water / day. Maintain good hygiene. Daily. Read more...
No. This diet is severely lacking in protein. It's similar to the diet that caused endemic pellagra, mental illness and death here in Mississippi. The only source of iron and B12 is the multi-vitamin, and you're likely to run low on calcium and some others. Trying this would be psychotic. Further, a "healthy life" includes exercise, love, pursuing meaningful goals, and much more. Read more...