Inflammation is controlled by cholesterol, and cholesterol is controlled by PPARs and CREB, and PPARs and CREB is controlled by.. Yes.. The 'Mammalian target of rapamycin complex 1'
And yes "it is in the food". And yes you can fix it with diet.

A LOT of research:
cf. Acne, ketogenic diet:
'Nutrition and Acne: Therapeutic Potential of Ketogenic Diets' - A. Paoli et al.

cf. tumour suppression, lifespan, longevity:
'Many forks in the path: cycling with FoxO' - K. K. Ho et al.

cf. ketogenic diet and cancer:
'Effects of a ketogenic diet on the quality of life in 16 patients with advanced cancer: A pilot trial'
- Melanie Schmidt et al.

'The Ketogenic Diet and Hyperbaric Oxygen Therapy Prolong Survival in Mice with Systemic Metastatic Cancer'
- Angela M. Poff et al.

cf. ketogenic diet cancer, PCOS, acne, neurological diseases etc.:
'Beyond weight loss: a review of the therapeutic uses of very-low- carbohydrate (ketogenic) diets'
- A Paoli et al.

cf. Cancer/autophagy/mtorc1:
'Regulation of autophagy by polyphenolic compounds as a potential therapeutic strategy for cancer'
- N Hasima et al.

'mTORC1/2 targeted by n-3 polyunsaturated fatty acids in the prevention of mammary tumorigenesis and tumor progression'
- Z Chen et al.

cf. Neurological Diseases:
'Recent Updates in the Treatment of Neurodegenerative Disorders Using Natural Compounds'
- Mahmood Rasool et al.

cf. Acne,western diet, paleolithic diet:

'Potential role of FoxO1 and mTORC1 in the pathogenesis of Western diet-induced acne.'
- Melnik BC, Zouboulis CC

'Over-stimulation of insulin/IGF-1 signaling by western diet may promote diseases of
civilization: lessons learnt from laron syndrome'
- Bodo C Melnik et al.

cf. Acne, Androgens, 5-alpha-reductase:
'Oily Skin: An Overview
- Thais H. Sakuma, Howard I. Maibach'

cf. Cardiac disease, mtorc1:
'Mammalian Target of Rapamycin Signaling in Cardiac Physiology and Disease'
- Sebastiano Sciarretta et al.

cf. Western diet, diabetes type 2, acne:
'Leucine signaling in the pathogenesis of type 2 diabetes and obesity'
- Bodo C Melnik

cf. Autophagy, western diet (high leucine content):

'Leucine and mTORC1/ a complex relationship'
- Kayleigh M. Dodd , Andrew R. Tee

cf. Seborrheic dermatitis - androgen connection:
'The Bacteriologic Flora in Seborrheic Dermatitis'
- Elliott A Pachtman et al.

cf. acne:

Diet in acne: further evidence for the role of nutrient signalling in acne pathogenesis. B. Melnik

Dietary intervention in acne. Attenuation of increased mTORC1 signaling promoted by Western diet. - B. Melnik

Over-stimulation of insulin/IGF-1 signaling by Western diet may promote diseases of civilization: lessons learnt from Laron syndrome. - B. Melnik

Family history, body mass index, selected dietary factors, menstrual history, and risk of moderate to severe acne in adolescents and young adults. - Landro et. al.

Mediterranean diet and familial dysmetabolism as factors influencing the development of acne.
- Skroza et. al.

Diet and acne update: Carbohydrates emerge as the main culprit. Mahmood, Bowe

Potential role of FoxO1 and mTORC1 in the pathogenesis of Western diet-induced acne. - Melnik

Are therapeutic effects of antiacne agents mediated by activation of FoxO1 and inhibition of mTORC1? - Melnik

cf. PPARs, CREB, mTOR, Cholesterol, inflamation:

Major involvement of mTOR in the PPAR-induced stimulation of adipose tissue lipid uptake and fat accretion. - Blanchard et al.

CREB controls hepatic lipid metabolism through nuclear hormone receptor PPAR-
- Herzig et al.

regulation of peroxisome proliferator-activated receptor-gamma activity by mammalian target of rapamycin and amino acids in adipogenesis - Kim JE

The mammalian target of rapamycin regulates cholesterol biosynthetic gene expression and exhibits a rapamycin-resistant transcriptional profile.
- Wang et al.

So now we know what acne is and we know the same pathway can cause a lot of bad diseases, and we also know how to fix it, so why do we keep looking for quick fixes in magic pills?
(By the way with 'we' I mean you. I did fixe acne with 2 months paleo.)