I have done talks on a variety of subjects to an array of charitable groups. Examples of previous talks:
Jewish Blind and Disabled: running various hour workshops through zoom, to support the residents with nutritional information: from understanding blood sugar levels to how food can affect sleep patterns.
Mildmay Mission Hospital: 3 week workshop for HIV out-patients on consuming a whole food diet and why this is important for maintaining health
Cancer Kin: a breast cancer charity at The Royal Free Hospital, about using food to optimise energy
Various Primary Schools: talks for parents on how to deal with fussy eaters and general healthy eating guides for young children