I did the keto diet two years ago and it was wonderful for energy and alertness.
Literally ate only two meals a day, two black coffees and plenty of water.
I found throughout the day my mind was constantly alert and my energy levels remained constant all day without ups or downs.
Last year i ran a vegetarian diet for six months. The first half was great as i was eating plenty of greens, pasta etc. But the second half went down hill as our home life was a bit nuts with work and kids, so it was vegetarian food but tonnes of frozen, less greens etc.
I think from my own experience the best types of diets consist of :
- Plenty of leafy greens
- Fruit multiple times a day
- Seeds and nuts
- Vitamins and minerals
- Carb sources such as pasta, rice and noodles. Porridge for breakfast.
- Multiple protein sources but, not in excessive amounts and organic where you can i.e fish, chicken, lamb.
- Keep Meat sources to 2 - 3 times a week.
You will find that it would be very hard to eat enough of these foods to put on weight.
It is important to stay away from :
- Processed sugars
- Too much caffeine
- Sweets, crisps and biscuits.
- Too much dairy
If you're having issues with guts like some people in this thread the following can help :
- Probiotics to help with gut bacteria
- Pineapple and pure pineapple juice contains compounds which help digest and break down food
- Digestive enzymes to help break down food
- Keeping a food dairy to see what foods trigger your symptoms.
And finally i would suggest a minimal amount of exercise if you cant make the gym. A 30 - 45 min walk a day can help keep your guts flowing, blood pumping around your body, oxygen flowing which all helps in feeling better and having an efficient system.
One of my main aims this year is to have one of the healthiest years i have ever had.
I will be following more or less the diet above mainly veg and leafy greens with pasta / noodles. Meat sources twice a week. Fish twice. And plenty of exercise !