Hello dear,
The delay in appearance of facial hairs can be due to decreased
testosterone levels.
Kindly consult an
Endocrinologist & get a hormonal assay done.
Regarding the issue of increase in height, it is determined by Genetics, Environmental & Nutritional factors and Hormonal factors (most important the
Growth Hormone secreted by
pituitary gland in brain)
An individual stops growing in height after the fusion of the Epiphyses (growth plates) of the long bones, which occurs by the age of 17-21 yrs in males.
So...as you are 19 years now, there is still chance of further increase in height.
An X ray for bone age determination can be taken to look for the fusion of epiphyses.
Make sure that you are taking a healthy & balanced diet, exercise regularly & avoid stress.
Protein rich diet like soya, groundnut, pulses, etc should be incorporated in your
diet plan.
One more thing, please do not get influenced by any advertisement or health product which claim to boost your growth hormone & increase height...it may be harmful.
Wishing you Good Health.
Take care.