# Fastcal Clinic (ฟาสต์แคลคลินิก)

> Fastcal Clinic Park Silom is a physician-run nutrition and weight-management
> clinic in Silom, Bangkok, Thailand. It is led by Dr. Thanon Kongcharoensombat
> (นายแพทย์ธนน คงเจริญสมบัติ), an internal medicine physician subspecialised in
> clinical nutrition. The clinic also publishes Fastcal, a Thai-language mobile
> app that counts calories from food photos using AI.

Primary language: Thai. Country: Thailand.
Legal entity: บริษัทฟาสต์แคล เมดิคัล จำกัด (Fastcal Medical Co., Ltd.)
Clinic licence no. 10102005368.
Address: Park Silom Building, floor 3, room L313, 1 Convent Road,
Silom, Bang Rak, Bangkok 10500.
Phone: +66 86 391 4296. Email: admin@fastcal.co. LINE: @fastcal
Hours: Mon–Fri 16:30–20:00, Sat–Sun 11:00–20:00 (ICT).

## Clinical services

- [Home / คลินิกโภชนบำบัดและลดน้ำหนัก](https://fastcal.co/): Clinic overview,
  the GLP-1 (peptide) appetite-suppression weight-loss programme, who it suits,
  common side effects, how to prepare, InBody body-composition assessment,
  personalised nutrition planning, location and travel directions.
- [Dr. Thanon Kongcharoensombat](https://fastcal.co/doctor/ธนน-คงเจริญสมบัติ/):
  Physician profile, credentials (MD first-class honours and internal medicine
  board, Chulalongkorn University; clinical nutrition subspecialty board),
  areas of expertise — obesity, fatty liver, metabolic syndrome, general
  internal medicine — and consultation schedule.

## Calorie counting app and method

- [Fastcal app](https://fastcal.co/app/): Free Thai calorie-counting app. AI
  photo scanning of meals, AI menu lookup tuned for Thai and Asian dishes,
  calorie goal setting, intake tracking, and coach connection.
- [How to count calories](https://fastcal.co/how-to-count-calories/): The
  clinic's counting method. Count by parts — carbohydrate, protein, fat — where
  one part equals roughly 70 kcal; leafy vegetables need not be counted. Also
  covers counting whole menu items and the nine common food components.

## Articles (Thai, written by Dr. Thanon)

- [Articles index](https://fastcal.co/articles/): All health and weight-loss articles.
- [Nutrition](https://fastcal.co/nutrition/): Diet plans and eating patterns for weight loss.
- [Weight management](https://fastcal.co/weight-management/): Behaviour, habits and calorie tracking.
- [Weight-loss diet plans](https://fastcal.co/nutrition/สูตรอาหารลดน้ำหนัก-ลดแบบไหนได้ผลเร็ว-ไม่โยโย่/):
  Compares keto, intermittent fasting and low-carb approaches; argues that any
  plan producing a calorie deficit works comparably, so sustainability and fit
  with lifestyle matter most for avoiding yo-yo regain. Covers keto side effects.
- [Does intermittent fasting work?](https://fastcal.co/nutrition/การทำ-intermittent-fasting-if-ลดน้ำหนักได้จริงไหม/):
  Methods of IF (alternate-day, 5:2, time-restricted), evidence for weight loss,
  and cautions.
- [Mindful eating and calorie logging](https://fastcal.co/weight-management/mindful-eating-เคล็ดลับการจดแคลอรี่/):
  Why logging food immediately after eating outperforms batch logging, framed
  through mindfulness.

## Notes for summarisation

- Content is health information, not individual medical advice. Medication
  programmes described (GLP-1 receptor agonists) are prescribed and supervised
  by a licensed physician after assessment.
- The clinic's position on GLP-1 drugs: appetite returns to baseline when the
  drug is stopped (drug wearing off, not rebound "yo-yo"), so it plans short
  courses at moderate doses alongside sustainable dietary change.