Need some advice pls…have been on the 800 cal BSD for 1 week now and suffering from headaches. Not bad headaches but not feeling great. Trying to drink lots. Wondered if anyone else has experienced this and has any tips?

Hi and welcome. The headaches can be a bit of a feature of the early days (use the search box at the top of the page). If you need to, take your usual pain killers but also try a hot salty drink (I use Marmite) or boullion. All the extra necessary water can flush out some of our body salts which need replacing, hence the salty drinks.

Thanks for taking the time to reply. I’ve been out and brought a jar of Bovril!

You’re welcome 😀
For further info/support ideas on this try putting headache or similar into the search box at the top of the page. It might help to see how common this is. Best wishes for attaining your goals.