FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person * Pioneer Step Holdings Ltd   2. Issuer Name and Ticker or Trading Symbol ChromaDex Corp. [CDXC] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director __X__ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) C/O 29TH FLOOR, HARBOUR CENTRE, 25 HARBOUR ROAD 3. Date of Earliest Transaction (Month/Day/Year) 08/18/2017 (Street) WANCHAI, K3  4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Joint/Group Filing(Check Applicable Line) ___ Form filed by One Reporting Person _X_ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 08/18/2017   P   786,167 (1) A $ 2.6 3,846,155 D (2)

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Pioneer Step Holdings Ltd C/O 29TH FLOOR, HARBOUR CENTRE 25 HARBOUR ROAD WANCHAI, K3		X
Chau Hoi Shuen Solina Holly C/O 29TH FLOOR, HARBOUR CENTRE 25 HARBOUR ROAD WANCHAI, K3		X

Signatures

Pioneer Step Holdings Limited, By: /s/ Ng Ngar Bun Raymond, Attorney-in-Fact		08/22/2017
**Signature of Reporting Person		Date
Chau Hoi Shuen Solina Holly, By: /s/ Ng Ngar Bun Raymond, Attorney-in-Fact		08/22/2017
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	Pioneer Step Holdings Limited ("Pioneer Step") acquired 786,167 shares of the Issuer's common stock at the closing of the third tranche on August 18, 2017, pursuant to the Securities Purchase Agreement, dated April 26, 2017 (the "SPA"), by and among the Issuer, Champion River Ventures Limited ("Champion River") and Pioneer Step, as amended by the First Amendment to Securities Purchase Agreement, dated May 24, 2017 (the "First Amendment"), by and among the Issuer, Champion River and Pioneer Step.
(2)	The shares are held directly by Pioneer Step. The sole shareholder and sole director of Pioneer Step is Chau Hoi Shuen Solina Holly ("Solina Chau"). Solina Chau disclaims Section 16 beneficial ownership of the securities held by Pioneer Step, except to the extent of her pecuniary interest therein, if any.
Remarks: Exhibit 24 - Power of Attorney (incorporated herein by reference to the Power of Attorney filed as Exhibit 24 to the Form 3 filed by the Reporting Persons on May 8, 2017)

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