Originally Posted by
himespau
The one problem with this plan for using raspberry extract to lose weight is that, in my experience, it's only in their second year of growth after planting cuttings that the raspberry plants begin to bear much in the way of fruit. So you'll need to add "wait a year and go for some nice long bike rides to pass the time" to your plan. Unless of course, you want to skip that part of the process and go looking for wild black raspberry plants (my preference is the yellows) and, in particular, those right next to a bear den. Make lots of noise while harvesting the berries and then get ready to run.
I grow raspberries in my garden. In fact, I grow and pick far more than I can eat. While most raspberries don't bear the first year and only give fruit on last year's growth, that is not the case with all of them. I have some varieties that bear on both this year's and last year's growth. I start picking in May and don't stop until December, although there is a period in the late summer/early fall when the yield is low since some plants are winding down their production on last year's growth and some are starting up on this year's.
We used to host a chess instructor from Moscow every June. His wife and daughter thought raspberries were the best fruit in the world. He would tease them by eating large bowls of fresh raspberries while talking to them on Skype.
Anyway, I think the only aspects of raspberries that are likely to significantly contribute to weight loss are the calories expended in growing them and the time away from other snacks while tending/picking them.